Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
The European hazelnut weevil, Curculio nucum, is a long-snouted beetle whose larvae develop inside hazelnuts, consuming the kernel and often causing blank nuts and…
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Currant aphid, Cryptomyzus ribis, is a sap-sucking pest of currants that feeds mainly on the undersides of young leaves. Feeding produces raised blisters, puckering,…
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The spotted asparagus beetle, Crioceris duodecimpunctata, is a reddish-orange leaf beetle marked with twelve black spots. Adults chew tender asparagus spears and fern growth,…
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The asparagus beetle, Crioceris asparagi, is a chewing leaf beetle that feeds almost exclusively on asparagus. Adults attack emerging spears, causing brown scars, hooked…
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The brown garden snail, Cornu aspersum, is a nocturnal, plant-feeding land snail that damages vegetables, fruit, seedlings, ornamentals, and young trees. It chews irregular…
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Swede midge, Contarinia nasturtii, is a tiny invasive fly whose larvae feed on the growing points of cabbage-family crops. Injury causes puckered, swollen or…
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Brown soft scale, Coccus hesperidum, is a sap-feeding soft scale insect found on citrus, avocado, holly, houseplants, and many other broadleaf plants in the…
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The Mediterranean fruit fly, Ceratitis capitata, is a highly polyphagous tephritid pest that attacks ripening fruit and some fruiting vegetables. Females pierce the skin…
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The European wheat stem sawfly, Cephus pygmaeus, is an introduced stem-boring pest of wheat and other grasses in parts of eastern North America. Larvae…
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The horse chestnut leaf miner, Cameraria ohridella, is a small moth whose larvae tunnel between the layers of horse chestnut leaves. The resulting pale…
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Pear sawfly, also called pear slug or cherry slug, is a foliage-feeding sawfly whose slimy larvae skeletonize leaves of pear, cherry, plum and related…
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