![]() White speckling or stippling on upper leaf surface, tip and margin appear scorched white cast insect skins on underside of leaves.Introduce beneficial insects into the garden. Remove infested leaves and the whole plant if infestation is serious. Whiteflies congregate on the undersides of leaves and fly up when disturbed. Clouds of tiny white insects fly when plant is disturbed. Leaves yellow shiny sticky honeydew on leaf surface.Ants farm aphids control ants with sticky barrier. They suck plant juices and leave behind sticky excrement called honeydew. Aphids are tiny, oval, and yellowish to greenish pear-shaped insects that colonize on the undersides of leaves. Leaves curl under and become deformed shiny, sticky honeydew on leaf surfaces black sooty mold may follow.Coat plants with kaolin clay to discourage feed and egg-laying. Exclude beetles from the garden with row covers. Plant late in cool regions and early in warm regions to avoid first egg laying. Japanese beetles have iridescent green wing covers. Beetles and larvae feed on undersides of bean leaves. The larva is yellow with a long black-tipped spine. Mexican bean beetle or Japanese beetle: Mexican bean beetle is a coppery-yellow bug the size and shape of a ladybug, about ¼-inch long with 16 black spots on winger covers. Hand pick mulch around plants plant resistant varieties dust with wood ashes. Striped cucumber beetle has wide black stripes on wing covers. Spotted cucumber beetle is greenish, yellowish, ¼ inch (7mm) long with black spots and black head. Holes chewed in leaves, leaves skeletonized.Cultivate to 6 inches in spring to destroy larvae and disrupt the life cycle. Bean leaf beetles are reddish to yellowish-orange about ¼-inch long with black spots on their backs and black margins on their front wings. Large irregular shaped holes in leaves.Spread diatomaceous earth around seedling. The larvae feed on roots of germinating plants. They eat small holes in the leaves of seedlings and small transplants. Flea beetles are tiny bronze or black beetles a sixteenth of an inch long. Tiny shot-holes in leaves of seedlings.Plants will outgrow and recover thrip attack. Thrips are tan to black bugs that look like slivers of wood Thrips feed on plants, rasping plant tissue. Seedlings and plants stunted leaves yellowed and distorted.Pull up the seedlings, warm the soil with black or clear plastic, and sow new seed. The soil temperature is likely below 60☏. Cold soil and weather can weaken seedlings that do emerge too early. Seedlings are stunted and never recover.Damping off is a fungus that lives in the soil, particularly where humidity is high. Seeds rot or seedlings collapse with dark water-soaked stems as soon as they appear.Cultivate to expose the larvae and disturb the life cycle. Seed corn maggots are the small yellowish-white larvae of small gray flies. Seedlings are deformed or have no growing tips or leaves when they emerge.Keep garden clean of debris and plant residue. Cutworms are gray grubs curled in soil at base of plants. Seedlings are sheared or cut at the soil level, wilt and fall over.Plant beans about 1 inch deep in early spring 2 inches deep later in the season. Beans planted at the end of spring or in summer may dry out and die if sown less than 1 inch deep. Beans planted in spring 2 inches deep or more may rot and fail to germinate. Add aged compost to the planting bed cover seed with light compost mulch (3) Seed was sown too deep or not deep enough. Delay planting until the soil has warmed (2) Soil is heavy or crusted seedlings may not be able to push through. Several possible causes: (1) Beans are a warm weather crop and seed may rot in soil less than 50° to 60° F. Bean problems: possible causes and cures: For more on vegetable garden pests and diseases see the Pest Problem Solver and the Disease Problem Solver in the Index. Here is a list of common bean problems and possible causes and cures. All of these crops share similar problems. Facebook Tweet Pin Avoid bean growing problems by growing beans when temperatures have warmed and nights are no longer chilly.īeans: garden beans–including pole, bush, and shell–lima beans, mung beans, scarlet runner beans, asparagus beans, and southern peas (which are not beans but share similar cultural requirements).
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