Recent Changes for "Aphids" - Davis Wiki

Aphids

TheAmazingLarry — 2009-04-10 07:46:25

the bastards are back!!!

Differences for Aphids

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	+ + [[Image(aphids-planning-the-attack-b.jpg, "Aphids, craftily piecing together their plan of attack.", 300, thumbnail)]]

Aphids

TheAmazingLarry — 2009-04-10 07:45:58

Upload of image aphids-planning-the-attack-b.jpg.

Aphids

JabberWokky — 2008-09-09 19:43:53

The wiki cannot be grateful enough for AlphaDog's contributions.

Differences for Aphids

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- [[Image(fauna_aphids2.jpg, "Aphids ''love'' ["roses"] and ["ants"] will protect aphids from natural predators.", 480, left, thumbnail)]]	+ [[Image(fauna_aphids2.jpg, "Aphids ''love'' ["roses"] and ["ants"] will protect aphids from natural predators.", 480, left, thumbnail, noborder)]]
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- [[Image(fauna_aphids3.jpg, "These spring rose buds are almost completely covered by aphids.", 360, right, thumbnail)]]	+ [[Image(fauna_aphids3.jpg, "These spring rose buds are almost completely covered by aphids.", 360, right, thumbnail, noborder)]]

Aphids

TheAmazingLarry — 2008-06-14 19:48:58

exoskeleton pic

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	+ [[Image(white-bugs-on-petunia-stem.jpg, "As aphids grow, they shed and leave their exoskeletons behind.", 300, right, thumbnail)]] +

Aphids

TheAmazingLarry — 2008-06-14 19:48:03

Upload of image white-bugs-on-petunia-stem.jpg.

Aphids

AlphaDog — 2006-10-18 08:39:05

+damn hackberries

Differences for Aphids

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- Aphids may be green, yellow, brown, red, or black depending on the species and the plants they feed on. A few species may appear waxy or woolly, but all are small, pear-shaped insects with long legs and antennae. Wooly Aphids are perhaps the most conspicuous of Davis aphids. During spring they are often collected on unsuspecting ["bicycling" bicyclist's] shirts or hair. The white "wool" of the aphids is waxy sugar which causes a sticky mess when it drops off of ["town flora" trees]. Generally adult aphids are wingless, but most species also occur in winged forms, especially during spring and fall when populations are high. Aphids often feed in dense groups and do not move rapidly when disturbed. On roses in particular, you may see large numbers of aphids clustered on buds and near rose heads.	+ Aphids may be green, yellow, brown, red, or black depending on the species and the plants they feed on. A few species may appear waxy or woolly, but all are small, pear-shaped insects with long legs and antennae. Wooly Aphids are perhaps the most conspicuous of Davis aphids and infest Chinese hackberry trees -- the white "wool" of these aphids is waxy sugar which causes a sticky mess when it drops off ["town flora" trees]. Generally adult aphids are wingless, but most species also occur in winged forms, especially during spring and fall when populations are high. Aphids often feed in dense groups and do not move rapidly when disturbed. On roses in particular, you may see large numbers of aphids clustered on buds and near rose heads.

Aphids

JabberWokky — 2006-08-20 12:14:33

rm comment bar (there's an edit button, no reviews of insects are likely)

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- - [[Comments]]

Aphids

MatthewTom — 2006-08-20 10:03:42

Adding comments to all the insect/arthro pages

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	+ + [[Comments]]

Aphids

JabberWokky — 2006-07-18 21:07:25

-br

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- [[BR]][[BR]][[BR]][[BR]][[BR]]

Aphids

JasonAller — 2006-01-28 17:02:56

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
- [[Thumbnail(fauna_aphids2.jpg, left, 480, "Aphids ''love'' ["roses"] and ["ants"] will protect aphids from natural predators.")]]	+ [[Image(fauna_aphids2.jpg, "Aphids ''love'' ["roses"] and ["ants"] will protect aphids from natural predators.", 480, left, thumbnail)]]
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- Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on ["Culinary Plants" vegetables] such as ["Squash" squashes], ["cucumbers"], ["pumpkins"], ["melons"], ["beans"], ["potatoes"], ["lettuce"]s, ["beets"], chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["mantids" praying mantis'] frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.	+ Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on ["Culinary Plants" vegetables] such as squashes, cucumbers, pumpkins, melons, beans, potatoes, lettuces, ["beets"], chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["mantids" praying mantis'] frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.
Line 10:	Line 10:
- [[Thumbnail(fauna_aphids3.jpg, right, 360, "These spring rose buds are almost completely covered by aphids.")]]	+ [[Image(fauna_aphids3.jpg, "These spring rose buds are almost completely covered by aphids.", 360, right, thumbnail)]]
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- Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. Another way to get rid of aphids is to make a nicotine tea by soaking cigarette butts in water then spraying the resultant tea on plants -- aphids don't like nicotine. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on encouraging your beneficials to stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or ["weather" when it is very hot] and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.	+ Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. Another way to get rid of aphids is to make a nicotine tea by soaking cigarette butts in water then spraying the resultant tea on plants -- aphids don't like nicotine. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on encouraging your beneficials to stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or ["weather" when it is very hot] and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some roses, ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.

Aphids

JackHaskel — 2005-06-11 12:33:00

wooly aphid info. it's sugar right?

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 6:	Line 6:
- Aphids may be green, yellow, brown, red, or black depending on the species and the plants they feed on. A few species may appear waxy or woolly, but all are small, pear-shaped insects with long legs and antennae. Generally adult aphids are wingless, but most species also occur in winged forms, especially during spring and fall when populations are high. Aphids often feed in dense groups and do not move rapidly when disturbed. On roses in particular, you may see large numbers of aphids clustered on buds and near rose heads.	+ Aphids may be green, yellow, brown, red, or black depending on the species and the plants they feed on. A few species may appear waxy or woolly, but all are small, pear-shaped insects with long legs and antennae. Wooly Aphids are perhaps the most conspicuous of Davis aphids. During spring they are often collected on unsuspecting ["bicycling" bicyclist's] shirts or hair. The white "wool" of the aphids is waxy sugar which causes a sticky mess when it drops off of ["town flora" trees]. Generally adult aphids are wingless, but most species also occur in winged forms, especially during spring and fall when populations are high. Aphids often feed in dense groups and do not move rapidly when disturbed. On roses in particular, you may see large numbers of aphids clustered on buds and near rose heads.

Aphids

AlphaDog — 2005-05-04 17:03:09

fix link

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 8:	Line 8:
- Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on ["Culinary Plants" vegetables] such as ["Squash" squashes], ["cucumbers"], ["pumpkins"], ["melons"], ["beans"], ["potatoes"], ["lettuce"]s, ["beets"], chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["praying mantis"]' frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.	+ Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on ["Culinary Plants" vegetables] such as ["Squash" squashes], ["cucumbers"], ["pumpkins"], ["melons"], ["beans"], ["potatoes"], ["lettuce"]s, ["beets"], chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["mantids" praying mantis'] frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.

Aphids

AlphaDog — 2005-05-03 16:01:34

+links

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
- [[Thumbnail(fauna_aphids2.jpg, left, 480, "Aphids ''love'' ["roses"]!")]]	+ [[Thumbnail(fauna_aphids2.jpg, left, 480, "Aphids ''love'' ["roses"] and ["ants"] will protect aphids from natural predators.")]]
Line 8:	Line 8:
- Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on vegetables such as squashes, cucumbers, pumpkins, melons, beans, potatoes, lettuces, beets, chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["praying mantis"]' frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.	+ Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on ["Culinary Plants" vegetables] such as ["Squash" squashes], ["cucumbers"], ["pumpkins"], ["melons"], ["beans"], ["potatoes"], ["lettuce"]s, ["beets"], chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["praying mantis"]' frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well.
Line 13:	Line 13:
- * Aphids especially love flowering plums, ["roses"], tulip trees, ["crape myrtle"]s, apples, and many vegetables. Expect aphids when you grow these plants.	+ * Aphids especially love flowering ["plums"], ["roses"], tulip trees, ["crape myrtle"]s, ["apples"], and many ["Culinary Plants" vegetables]. Expect aphids when you grow these plants.
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- Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. Another way to get rid of aphids is to make a nicotine tea by soaking cigarette butts in water then spraying the resultant tea on plants -- aphids don't like nicotine. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on encouraging your beneficials to stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.	+ Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. Another way to get rid of aphids is to make a nicotine tea by soaking cigarette butts in water then spraying the resultant tea on plants -- aphids don't like nicotine. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on encouraging your beneficials to stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or ["weather" when it is very hot] and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.
Line 18:	Line 18:
- [http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7404.html UC Integrated Pest Management] program provides a wealth of information on pest control, especially in the ["Davis"] area. To learn more about the various plants growing in our town, visit our ["Town Flora"], and check out our ["Town Wildlife"] to see what other bugs and such terrorize our neighborhoods.	+ [http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7404.html UC Integrated Pest Management] program provides a wealth of information on pest control, especially in the ["Davis"] area. Don Shor of ["Redwood Barn Nursery"] has also written an informative [http://redwoodbarn.com/DE_aphidstrategies.html article] on tools for battling aphids. To learn more about the various plants growing in our town, visit our ["Town Flora"], and check out our ["Town Wildlife"] to see what other bugs and such terrorize our neighborhoods.

Aphids

AlphaDog — 2005-04-13 15:18:28

incorp. comment, +pic

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
- [[Thumbnail(fauna_aphids2.jpg, left, 360, "Aphids ''love'' ["roses"]!")]]	+ [[Thumbnail(fauna_aphids2.jpg, left, 480, "Aphids ''love'' ["roses"]!")]]
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	+ [[Thumbnail(fauna_aphids3.jpg, right, 360, "These spring rose buds are almost completely covered by aphids.")]]
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- Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on ensuring that your beneficials stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.	+ Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. Another way to get rid of aphids is to make a nicotine tea by soaking cigarette butts in water then spraying the resultant tea on plants -- aphids don't like nicotine. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on encouraging your beneficials to stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.
Line 18:	Line 19:
- - ''One way to get rid of aphids is to soak cigarette buts in water, pour the water into a spray bottle, and spray the plants. Aphids don't like nicotine.'' --["SummerSong"]

Aphids

AlphaDog — 2005-04-13 15:14:14

Upload of image fauna_aphids3.jpg.

Aphids

AlphaDog — 2005-04-06 08:04:26

+pic

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
	+ [[Thumbnail(fauna_aphids2.jpg, left, 360, "Aphids ''love'' ["roses"]!")]] + [[BR]][[BR]][[BR]][[BR]][[BR]] +

Aphids

AlphaDog — 2005-04-06 08:01:45

Upload of image fauna_aphids2.jpg.

Aphids

SummerSong — 2005-04-03 17:31:58

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
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	+ + ''One way to get rid of aphids is to soak cigarette buts in water, pour the water into a spray bottle, and spray the plants. Aphids don't like nicotine.'' --["SummerSong"]

Aphids

AlphaDog — 2005-04-03 15:37:00

+plants affected by horticultural oils

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
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- Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on ensuring that your beneficials stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.	+ Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on ensuring that your beneficials stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products; there are some precautions for use on impatiens, ["fuchsia"], hibiscus, some ["roses"], ornamental ["olive trees" olive] and some carnation varieties. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees.

Aphids

AlphaDog — 2005-04-03 15:20:15

Differences for Aphids

Deletions are marked with - .	Additions are marked with +.
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	+ '''Aphids''' are tiny, soft-bodied insects with long, slender mouth parts that they use to pierce and suck out plant fluids from tender plant parts and new growth; spring is an ideal time for aphid colonies to establish feeding grounds. Almost every plant has one or more aphid species that occasionally feed on it, but low to moderate numbers of aphids typically cause little significant damage. + + Aphids may be green, yellow, brown, red, or black depending on the species and the plants they feed on. A few species may appear waxy or woolly, but all are small, pear-shaped insects with long legs and antennae. Generally adult aphids are wingless, but most species also occur in winged forms, especially during spring and fall when populations are high. Aphids often feed in dense groups and do not move rapidly when disturbed. On roses in particular, you may see large numbers of aphids clustered on buds and near rose heads. + + Though aphids can curl leaves and produce sticky honeydew, they rarely kill plants and can often be washed off with water. Large populations cause curling, yellowing, and distortion of leaves and stunting of shoots; they can also produce large quantities of a sticky honeydew, which often turns black with the growth of a sooty mold fungus. Some aphid species inject a toxin into plants, further distorting growth, and may transmit viruses on vegetables such as squashes, cucumbers, pumpkins, melons, beans, potatoes, lettuces, beets, chards, and bok choy; these cause mottling, yellowing, or curling of leaves and stunting of plant growth. When aphid numbers get high, natural enemies such as ["ladybugs"], parasitic ["wasps"], lacewings and ["praying mantis"]' frequently feed on them, eliminating the need for pesticides. Insecticidal soaps and oils, such as neem oil, are less toxic pesticides that can be used when treatment is necessary; be aware however, that pesticides and oils can adversely affect beneficial insects as well. + + Aphid infestations can occur in backyard gardens as a result of some of the following situations: + * Overfertilization can cause large volumes of lush new growth, which creates prolific feeding grounds for aphids. Use organic fertilizers or slow-release products to control plant growth. + * Aphids especially love flowering plums, ["roses"], tulip trees, ["crape myrtle"]s, apples, and many vegetables. Expect aphids when you grow these plants. + * ["Ants"] protect aphids as well as ["scale insects"] from their natural enemies. Reducing ant infestations on plants can help control both these populations. + + Reduce aphid populations by pruning infested leaves and stems, knocking populations off plants by shaking or spraying with a strong stream of water, protecting seedlings with covers or aluminum soil mulches. If you can simply ignore them, most aphids are heat-intolerant and will be gone from the Davis area by mid-June. For continuing problems, beneficial insects can be purchased at most nurseries; see our page on ["ladybugs"] for tips on ensuring that your beneficials stay within your yard. Alternatively, insecticidal oils and soaps are the next safest products and work by smothering aphids, so application must be thorough. Don't apply oils/soaps to drought-stressed plants or when it is very hot and be sure to read the literature to find out which plants are sensitive to these products. Oils and soaps, however, won't kill aphids hidden within curled leaves -- these must be pruned out. Of the oil and soap controls, insecticidal soaps, soap-pyrethrum mixtures, or neem oils are often applied on vegetables or small bushes like roses, while narrow range oils, like parafinic, supreme or superior oils, are appropriate for larger trees. + + [http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7404.html UC Integrated Pest Management] program provides a wealth of information on pest control, especially in the ["Davis"] area. To learn more about the various plants growing in our town, visit our ["Town Flora"], and check out our ["Town Wildlife"] to see what other bugs and such terrorize our neighborhoods.