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.

Asian Lady Beetle

Also known as the Halloween lady beetle or Japanese lady beetle, the multicolored Asian lady beetle (Harmonia axyridis) was introduced to the United States in 1916 as a biological control for aphids and scale insects.

Citrus Mealybug

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

Damping-Off Fungi

Damping-off is the infection of young seedlings by a variety of different fungi, most often species of Rhizoctonia, Pythium, and Fusarium.

Mexican Bean Beetle

Mexican bean beetle (Epilachna varivestis), a member of the ladybug family, attacks many kinds of beans—bush, pole, and lima—as well as cowpeas and soybeans.

Gray Garden Slug

The gray garden slug (Deroceras reticulatum), introduced from Europe, is the most damaging slug species in the United States.

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.