Pest
Hessian Fly
Mayetiola destructorThe 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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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Disease
Marssonina Leaf Spot of Poplar
Marssonina brunnea (Ellis & Everh.) MagnusMarssonina brunnea causes a fungal leaf-spot disease mainly of poplars (Populus spp.), especially susceptible hybrid and black-poplar types. Small brown to black spots with…
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Pest
Cabbage moth
Mamestra brassicae (Linnaeus, 1758)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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Disease
Rice blast
Magnaporthe oryzaeRice blast is a destructive fungal disease caused by Magnaporthe oryzae, best known for diamond-shaped lesions on rice leaves and damaging infections of the…
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Pest
Rose aphid
Macrosiphum rosaeThe 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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Pest
Potato aphid
Macrosiphum euphorbiaeThe 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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Disease
Charcoal rot
Macrophomina phaseolina (Tassi) Goid.Charcoal rot is a soilborne fungal disease caused by Macrophomina phaseolina. It is most damaging when hot, dry conditions stress the crop, especially during…
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Pest
Apple Leaf Mining Moth
Lyonetia clerkellaApple 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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Pest
Spongy moth
Lymantria dispar disparThe 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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Pest
European Tarnished Plant Bug
Lygus rugulipennisThe 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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Pest
Tarnished plant bug
Lygus lineolaris (Palisot de Beauvois)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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Disease
Lophodermium Needle Cast of Pine
Lophodermium seditiosumLophodermium needle cast is a fungal disease of pine needles caused primarily by Lophodermium seditiosum. It is most damaging to young trees, nursery stock…
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