Pests & Diseases

Citrus Mealybug

The citrus mealybug is a major greenhouse and houseplant pest. In subtropical climates, this sucking insect is also a problem outdoors.

Black Spot

Black spot (Diplocarpon rosae) is the most serious and widespread disease of roses, thriving wherever there is adequate humidity and rainfall.

Iris Borer

Adult iris borer moths fly at night and mate during August and September.

Squash Vine Borer

Squash vine borers (Melittia cucurbitae) are a serious vegetable garden pest east of the Rocky Mountains.

Field Bindweed

Field bindweed (Convolvulus arvensis), also known as wild morning glory, creeping Jenny, corn bind, and devil’s guts, is one of the world’s worst weeds and among the most difficult to eradicate.

Fall Webworm

This native insect found throughout North America feeds on at least 88 species of deciduous trees, from apple to willow.

Apple Scab

Apple scab (Venturia inaequalis) is a problem wherever apples are grown; it’s more serious, however, in temperate areas that experience cool, wet weather in spring and early summer.