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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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Pest
European Grapevine Moth
Lobesia botranaEuropean 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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Pest
American Serpentine Leafminer
Liriomyza trifoliiThe 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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Pest
Zöldséglevél-aknázólégy
Liriomyza sativaeA Liriomyza sativae apró, fekete-sárga levéltetűlégy? Nem levéltetű, hanem aknázólégy, amelynek lárvái a levelek belsejében járatokat rágnak. A kanyargó, világos aknák és a nőstények…
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Pest
Pea Leafminer
Liriomyza huidobrensisThe pea leafminer, Liriomyza huidobrensis, is a small agromyzid fly whose larvae tunnel between leaf surfaces, producing winding, pale mines often marked with dark…
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Pest
Lily Leaf Beetle (Scarlet Lily Beetle)
Lilioceris liliiLily leaf beetle, also called scarlet lily beetle, is an invasive leaf-chewing pest of true lilies and fritillaries in the United States. Bright red…
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Disease
Leveillula taurica powdery mildew
Leveillula tauricaLeveillula taurica causes an unusual powdery mildew of peppers, tomatoes and other warm-season crops. Unlike many powdery mildews, the fungus grows mainly inside the…
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Disease
Lettuce mosaic
Lettuce mosaic virusLettuce mosaic is a viral disease caused by Lettuce mosaic virus. It is especially important because the virus may arrive in contaminated seed and…
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Disease
Blackleg of Canola and Brassicas
Leptosphaeria maculansBlackleg, also called Phoma stem canker, is a serious fungal disease of canola, rapeseed and other susceptible Brassica crops. Early infections produce gray-green leaf…
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Pest
Colorado Potato Beetle
Leptinotarsa decemlineataThe Colorado potato beetle, Leptinotarsa decemlineata, is a highly destructive leaf-feeding pest of potatoes and other nightshade-family crops in the United States. Striped adults…
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Disease
Brown Spot Needle Blight
Lecanosticta acicolaBrown spot needle blight is a fungal disease of pine needles caused by Lecanosticta acicola, formerly known under names including Mycosphaerella dearnessii and Scirrhia…
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Pest
Small Brown Planthopper
Laodelphax striatellus (Fallén, 1826)The small brown planthopper, Laodelphax striatellus, is a sap-feeding insect of grasses and cereal crops, especially rice, maize, wheat, oats, and barley. Direct feeding…
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