Disease
Coral Spot Canker
Nectria cinnabarinaCoral spot canker is an opportunistic fungal disease of many deciduous trees and woody shrubs, especially tissue weakened by drought, transplant stress, winter injury,…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Pest
Green Peach Aphid
Myzus persicaeThe green peach aphid, Myzus persicae, is a small, highly mobile sap-feeding pest found on peach and many vegetable, field, ornamental, and weed hosts…
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Disease
European brown rot and blossom blight
Monilinia laxa (Aderhold & Ruhland) HoneyEuropean brown rot, caused by the fungus Monilinia laxa, is a disease of stone fruits that can kill blossoms and short shoots and rot…
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Disease
European brown rot
Monilinia fructigenaEuropean brown rot is a quarantine fungal disease caused by Monilinia fructigena. It primarily affects apples, pears and other pome fruits, but can also…
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Disease
Brown Rot of Stone Fruit
Monilinia fructicolaBrown rot of stone fruit, caused by the fungus Monilinia fructicola, attacks blossoms, twigs and fruit. In spring it can turn blossoms brown and…
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Pest
Citrus flatid planthopper
Metcalfa pruinosa (Say)The citrus flatid planthopper, Metcalfa pruinosa, is a sap-feeding true bug native to North America that attacks many woody plants, including citrus, grape, fruit…
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Pest
Common cockchafer (European cockchafer)
Melolontha melolonthaThe common cockchafer, or European cockchafer, is a large scarab beetle whose adults chew foliage while its soil-dwelling grubs feed on plant roots. Heavy…
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Pest
Javanese Root-Knot Nematode
Meloidogyne javanicaMeloidogyne javanica is a microscopic, soil-dwelling plant-parasitic nematode that invades roots and induces characteristic galls. It has a very broad host range and is…
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Pest
Southern root-knot nematode
Meloidogyne incognitaThe 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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Pest
Northern root-knot nematode
Meloidogyne haplaThe 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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Disease
Poplar Leaf Rust
Melampsora larici-populina KlebahnPoplar leaf rust is a wind-dispersed fungal disease caused by Melampsora larici-populina. It primarily affects Populus species and hybrids, producing yellow leaf spots above…
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