Pests & Diseases

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.