Black spot (Diplocarpon rosae) is the most serious and widespread disease of roses, thriving wherever there is adequate humidity and rainfall. Read Article
Adult iris borer moths fly at night and mate during August and September.
Squash vine borers (Melittia cucurbitae) are a serious vegetable garden pest east of the Rocky Mountains.
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.
This native insect found throughout North America feeds on at least 88 species of deciduous trees, from apple to willow. Read Article
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.
The greenhouse whitefly (Trialeurodes vaporariorum) is one of the most common house-plant pests. Read Article
This common scale (Coccus hesperidum) attacks a wide range of houseplants, including anthuriums, citrus, dieffenbachia, ferns, orchids, and ornamental figs. Read Article
BIOLOGY: Voles, also known as meadow or field mice, have stocky, furry bodies, short legs, and short tails. There are 23 species of voles in the United States, but the two of greatest consequence to gardeners are the meadow and … Read Article
Introduced from Europe, the cabbage maggot (Delia radicum, formerly Hylemya brassicae) is a serious pest of vegetable gardens in the northern United States and Canada. The fly primarily feeds on crucifers such as cabbage, cauliflower, broccoli, brussels sprouts, collards, kale, … Read Article
The garlic aroma of crushed or mowed leaves readily identifies this introduced weed.