Asparagus: Asparagus aphid categories: Asparagus Asparagus Insects Vegetables last review date: 2026-02-12 08:23 Aphid colony on leafPhoto by: A.L. Antonelli Biology Asparagus aphids are small (1⁄16″), powdery gray to gray-green insects. They may be winged or wingless. They feed in colonies on the ferns of asparagus and are typically found at the base of leaves. […]
Asparagus: Asparagus beetle categories: Asparagus Asparagus Insects Vegetables last review date: 2026-02-12 08:45 Spotted asparagus beetle adultPhotographer unknown. Biology Two species of beetles feed on asparagus. Both are about 1⁄4″ long. The asparagus beetle is blue-black, with yellow and red markings. The overwintering adult beetles feed on emerging spears in the spring, sometimes causing distortion […]
Asparagus: Cutworms and armyworms categories: Asparagus Asparagus Insects Vegetables last review date: 2026-02-12 09:04 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 gray to tan caterpillar are hairless, nocturnal, and generally spotted, striped, or otherwise […]
Beet, Chard: Damping-off categories: Beet, Chard Beet, Chard Diseases Vegetables last review date: 2026-02-27 11:14 Damping-off of cucumber seedlingsPhoto by: R.S. Byther Biology Damping-off is caused by fungi that remain in the soil for long periods of time. Infected seeds decay without germinating. Seedlings may be infected and fail to emerge from the soil. Emerged […]
Beet, Chard: Downy mildew categories: Beet, Chard Beet, Chard Diseases Vegetables last review date: 2026-02-27 11:19 Downy mildew on beet plantsOSU slide library Biology Downy mildew can infect any aboveground portion of beets and Swiss chard. The fungus can infect young cotyledon leaves, causing them to appear yellow, mildewed, and to curl downward. Larger leaves […]
Beet, Chard: Aphids categories: Beet, Chard Beet, Chard Insects Vegetables last review date: 2026-02-27 09:49 Aphid colony on leafPhoto by: A.L. Antonelli Biology Aphids are small, pear-shaped, soft-bodied insects. They may range in color from yellowish to dark green. Aphids typically feed on the underside of leaves, sucking sap from the plant tissues. Aphid feeding […]
Beet, Chard: Beet or spinach leafminer categories: Beet, Chard Beet, Chard Insects Vegetables last review date: 2026-02-27 11:06 Spinach leafminer damagePhoto by: A.L. Antonelli Biology The beet or spinach leafminer is the larva of a small (1⁄4″) gray fly with black hairs. Eggs are laid on the leaves of beets, chard, spinach, and weeds including […]
Bean: Bean aphids categories: Bean Bean Insects Vegetables last review date: 2026-02-16 02:59 Bean aphid on leafK. Grey Biology Bean aphids are small, pear-shaped, dark green to black insects. These soft-bodied insects often feed in clusters on the shoot tips and leaves of new growth. Severe infestations can result in curled or deformed leaves and […]
Bean: Bacterial blights categories: Bean Bean Diseases Vegetables last review date: 2026-02-16 02:43 Halo blight on green bean foliage C. Vanderstoep Biology Three distinct bacterial blights may affect beans in the area: halo blight (Pseudomonas syringae pv. phaseolicola), common bacterial blight (Xanthomonas axonopodis pv. phaseoli) bacterial brown-spot (Pseudomonas syringae pv. syringae). Bacteria pathogens require an […]
Bean: Common and yellow mosaics categories: Bean Bean Diseases Vegetables last review date: 2026-02-16 03:30 Bean yellow mosaic virus symptomsR.S. Byther Biology Bean common mosaic and bean yellow mosaic are virus diseases typically transmitted by aphids. The bean common mosaic virus is also seed-transmitted. Typical symptoms of these virus infections include blue-green, green, or yellowish […]
Bean: Brown marmorated stink bug categories: Bean Bean Insects Vegetables last review date: 2026-02-16 03:24 Brown marmorated stink bug adultPhoto by: M. Bush 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 feed on a wide variety of plant […]
Bean: Curly top (Beet curly top virus) categories: Bean Bean Diseases Vegetables last review date: 2026-02-16 03:38 Curly top virus symptoms on beanPhoto by: G.Q. Pelter Biology Curly top of bean is caused by Beet Curly Top Virus, a virus transmitted by beet leafhoppers. Many crops are affected, including tomato, bean, squash, cucumber, and pepper. […]
Bean: Damping-off categories: Bean Bean Diseases Vegetables last review date: 2026-02-18 03:00 Damping-off of cucumber seedlingsPhoto by: R.S. Byther Biology Damping-off is caused by fungi that remain in the soil for long periods of time. Seeds may be rotted, and seedlings may be infected and fail to emerge from the soil. Emerged seedlings are also […]
Bean: Cutworms and armyworms categories: Bean Bean Insects Vegetables last review date: 2026-02-18 02:35 Climbing cutworm, dark brown and hairlessPhoto 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, […]
Bean: Fusarium root rot categories: Bean Bean Diseases Vegetables last review date: 2026-02-18 03:07 Fusarium root rot on beanR.S. Byther Biology Root rot is a fungal disease which attacks the roots and underground stems of beans. Young, infected plants show reddish-brown streaking on the stem or taproots. The streaks spread until the entire lower stem […]
Bean: Spider mites categories: Bean Bean Insects Vegetables last review date: 2026-02-18 03:27 Spider mites under microscopePhoto by: L.K. Tanigoshi Biology Spider mites are tiny, eight-legged mites which may range in color from yellowish to green or red. Several species may occur on beans. They typically feed on the underside of leaves, causing a yellowish […]
Bean: Thrips categories: Bean Bean Insects Vegetables last review date: 2026-02-18 03:35 White speckling damage on pea leaf caused by thripsPhoto by: A.L. Antonelli Biology Thrips are tiny (≤1⁄20″), elongate, yellowish to dark insects. They typically feed in flower buds and blossoms. Thrips feeding can cause buds to fail to open. Blossom drop may also […]
Bean: Gray mold categories: Bean Bean Diseases Vegetables last review date: 2026-02-18 03:15 Botrytis gray mold on bean podsR.S. Byther Biology Gray mold of green beans is a fungal disease. It can affect any aboveground portion of the plant. Initial infection often occur on old flowers which remain on the plant. After initial infection, gray mold […]
Bean: Rust categories: Bean Bean Diseases Vegetables last review date: 2026-02-18 03:22 Early summer bean rust sporulationR.S. Byther Biology Bean rust is a fungal disease which typically affects leaves but can also be found on stems and pods. Small white blisters develop on the upper surface of infected leaves early in the summer. The underside […]
Bean: White mold (Sclerotinia rot) categories: Bean Bean Diseases Vegetables last review date: 2026-02-18 03:43 Sclerotinia white mold on bean pods and stemsPhoto by: R.S. Byther Biology White mold is a fungal disease which may attack stems, leaves, and pods of beans. Water-soaked spots appear on the lower portions of the plant. These spots soon […]