Corn

Corn: Root, stalk, and ear rots

Corn: Root, stalk, and ear rots categories: Corn Corn Diseases Vegetables revision date: 2022-12-07 12:00 Corn stalk rot causing brown decayed rootsPhoto by: OSU slide library Biology Several fungi cause rots of roots, stalks, and ears of corn. These fungi may be carried on the seed, and may result in poor germination and seedling death. […]

Corn: Seed rot and seedling blight (damping-off)

Corn: Seed rot and seedling blight (damping-off) categories: Corn Corn Diseases Vegetables revision date: 2022-12-07 12:00 Damping-off of cucumber seedlingsPhoto by: R.S. Byther Biology Several fungi can cause seed rots and seedling blights of corn. These can be carried on the seed, or can overwinter in the soil or infected plant debris. Seeds planted in […]

Corn: Smut

Corn: Smut categories: Corn Corn Diseases Vegetables revision date: 2022-12-07 12:00 Corn head smutPhoto by: R.S. Byther Biology Two types of smut occur on corn in the Pacific Northwest. Both are fungal diseases. Common smut may occur on any above-ground portion of the plant, causing gall-like swellings. The galls are initially covered with a greenish […]

Corn: Brown marmorated stink bug

Corn: Brown marmorated stink bug categories: Corn Corn Insects Vegetables revision date: 2023-04-04 12:00 Brown marmorated stink bugs feeding on corn, damage to kernelsPhoto by: Gerald Brust, Univ of Maryland Biology The brown marmorated stink bug (BMSB) is an introduced pest species from Asia that is spreading quickly across the United States. Nymphs and adults […]

Corn: Corn aphids

Corn: Corn aphids categories: Corn Corn Insects Vegetables revision date: 2023-04-04 12:00 Corn aphids on sheathPhoto by: Unknown Biology Aphids are small, soft-bodied, pear-shaped insects. They may vary in color from yellow to green to dark. Aphids typically feed in colonies on the leaves, often preferring the newer growth. Infested leaves turn yellow and may […]

Corn: Corn earworm

Corn: Corn earworm categories: Corn Corn Insects Vegetables revision date: 2023-04-04 12:00 Corn earworm damagePhoto by: A.L. Antonelli Biology The corn earworm is the caterpillar of a light to dark brown moth with a 1 1⁄2″ wingspan. The caterpillars are up to 1 1⁄2″ long at maturity. They vary widely in color, but typically have darker stripes […]

Corn: Cutworms and armyworms

Corn: Cutworms and armyworms categories: Corn Corn Insects Vegetables revision date: 2023-12-02 09:17 Tan armyworm caterpillar Photo by: K. Grey Biology Cutworms and armyworms are the larvae of noctuid moths. These common moths are medium-sized with fairly dull coloration. The greenish, grayish, or tan caterpillars are hairless, nocturnal, and generally spotted, striped, or otherwise marked. […]

Corn: Earwigs

Corn: Earwigs categories: Corn Corn Insects Vegetables revision date: 2022-12-07 12:00 Adult European earwigPhoto by: M. Bush Biology Earwigs are reddish-brown insects about 3⁄4″ or less in length. Both males and females have pincers at the rear end. Earwigs are largely beneficial, feeding on many pests such as aphids, mites, and nematodes, as well as […]

Corn: Spider mites

Corn: Spider mites categories: Corn Corn Insects Vegetables revision date: 2022-12-07 12:00 Spider mite damage on leafPhoto by: A.L. Antonelli Biology Spider mites are tiny, eight-legged mites which may range in color from yellowish to green or red. They typically feed on the underside of leaves, causing a yellowish to bronze stippling or speckling of […]

Corn: Western spotted cucumber beetle

Corn: Western spotted cucumber beetle categories: Corn Corn Insects Vegetables revision date: 2023-04-04 12:00 Western spotted cucumber beetlePhoto by: K. Grey Biology The western spotted cucumber beetle is a pest of many ornamentals and vegetables. About 1⁄4″ long, the adult beetles have yellow wing covers with black spots. The rest of the body is black. […]