Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
A Liriomyza sativae apró, fekete-sárga levéltetűlégy? Nem levéltetű, hanem aknázólégy, amelynek lárvái a levelek belsejében járatokat rágnak. A kanyargó, világos aknák és a nőstények…
Details
The pea leafminer, Liriomyza huidobrensis, is a small agromyzid fly whose larvae tunnel between leaf surfaces, producing winding, pale mines often marked with dark…
Details
Lily leaf beetle, also called scarlet lily beetle, is an invasive leaf-chewing pest of true lilies and fritillaries in the United States. Bright red…
Details
The 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…
Details
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…
Details
European spruce bark beetle (Ips typographus) is a serious bark-boring pest of spruce, especially Norway spruce, that breeds beneath the bark of stressed, recently…
Details
Cottony cushion scale, Icerya purchasi, is a sap-sucking insect that attacks citrus and many woody ornamentals in the United States. Females are recognized by…
Details
The mealy plum aphid, Hyalopterus pruni, is a small sap-feeding pest of plum and other Prunus trees. Pale green aphids covered in whitish wax…
Details
European apple sawfly, Hoplocampa testudinea, is an introduced sawfly pest of apple in parts of the eastern United States. Adults fly and lay eggs…
Details
The black plum sawfly, Hoplocampa minuta, is a specialized fruit-damaging sawfly associated mainly with European plum and myrobalan plum. Adults appear around plum bloom,…
Details
The yellow plum sawfly, Hoplocampa flava, is a fruit-damaging sawfly associated primarily with European plum and myrobalan plum. Adults appear around plum bloom, and…
Details
Beet cyst nematode is a microscopic, soil-borne plant parasite that attacks sugar beets, table beets, spinach, and many Brassica crops. Feeding on roots disrupts…
Details