Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
The southern root-knot nematode, Meloidogyne incognita, is a microscopic soil-dwelling pest that invades plant roots and induces characteristic galls. Infested plants may wilt during…
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The northern root-knot nematode, Meloidogyne hapla, is a microscopic soil-dwelling pest that penetrates plant roots and induces feeding sites and characteristic galls. It is…
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The Hessian fly, Mayetiola destructor, is a small midge-like insect and an important pest of wheat in many U.S. grain-growing regions. Its larvae feed…
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Cabbage moth, Mamestra brassicae, is a Palearctic noctuid moth whose caterpillars chew leaves, bore into cabbage heads and may damage a wide range of…
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The rose aphid, Macrosiphum rosae, is a soft-bodied sap-feeding insect found mainly on tender shoots, buds and young leaves of cultivated and wild roses.…
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The potato aphid, Macrosiphum euphorbiae, is a large, elongated aphid occurring in green and pink forms. It feeds on phloem and commonly colonizes potato,…
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Apple leaf mining moth, Lyonetia clerkella, is a small moth whose green larvae tunnel inside leaves of apple and other rosaceous trees. The characteristic…
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The spongy moth, Lymantria dispar, is an invasive leaf-feeding moth whose caterpillars can strip trees and shrubs during spring and early summer outbreaks. Oaks,…
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The European tarnished plant bug, Lygus rugulipennis, is a mobile, polyphagous plant bug that injures growing points, flower buds, blossoms, immature fruit and developing…
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The tarnished plant bug, Lygus lineolaris, is a mobile true bug that pierces buds, flowers, shoots, fruit and developing seeds on many crops and…
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European grapevine moth, Lobesia botrana, is a serious tortrix pest of grape flowers and berries. Larvae web flower clusters, bore into developing grapes, and…
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The American serpentine leafminer, Liriomyza trifolii, is a small fly whose larvae tunnel between the upper and lower surfaces of leaves. The winding, whitish…
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