Keep planting beds well-drained add aged compost. Southern blight or white mold is a fungal disease that favors wet conditions. Grayish-white mold growth on the soil surface and clinging to roots Keep the garden free of weeds which can harbor disease. Leaf and root problems Inner leaves yellowed outer leaves reddish-purple roots stunted and bitterĪster yellows is a mycoplasma disease spread by leafhoppers. Common in late summer or fall but does not result in the loss of the plant. Fungal spores germinate on dry leaf surfaces when the humidity is high spores do not germinate on wet leaves. Round white powdery spots and coating on leaves Infected plants can produce edible fruit but the size and yield are reduced. Remove broadleaf weeds that serve as virus reservoirs. Mosaic virus has no cure it is spread from plant to plant by aphids and leafhoppers. Mottled light and dark green patterns on leaves leaves are distorted and may become brittle and easily broken plants are stunted Cover plants with floating row covers to exclude leafhoppers. They jump sideways and suck the juices from plants. Leafhoppers are green, brown, or yellow bugs to ⅓-inch long with wedge-shaped wings. Leaves appear scorched, yellowed, curled, and wilted If pest nematodes are persistent, solarize the planting bed. Root-knot nematode is a microscopic eelworm that attacks feeder roots. Leaves turn yellow and then brown from the bottom up the plant loses vigor Handpick at night when these pests feed or set out saucers of beer at soil level to attract and drown slugs and snails. Cultivate often to disrupt the life cycle. Spread diatomaceous earth around seedlings. The larvae feed on the roots of germinating plants. Small holes in the leaves of seedlingsįlea beetles are tiny bronze or black beetles that eat small holes in the leaves of seedlings and small transplants. They leave behind sticky excrement called honeydew which can turn into a black sooty mold. Leaf problems Leaves curl under, become deformed, and yellowishĪphids are tiny, oval, and yellowish to greenish pear-shaped insects that colonize the undersides of leaves. Keep soil evenly moist to allow for germination. Cover the seed with 1 inch of fine-aged compost or vermiculite. Warm weather or dry conditions will cause the seed to dry and not germinate. Seeds rot or seedlings collapse with dark water-soaked stems as soon as they appearĭamping off is a fungus that lives in the soil, particularly where humidity is high. (2) High temperatures can keep seeds from germinating. (1) Soil crusting: keep planting beds evenly moist until seedlings emerge protect planting beds from heavy overhead irrigation or heavy rain which will cause soil to compact and crust. Seed and seedling problems Seedlings fail to emerge Roots are tunneled rusty mush oozes from tunnels.Roots twist around each, forked, or deformed.Roots rot or have enlarged white "eyes'. Roots are long, thin, and spindly, or short and stumpy.Grayish-white mold growth on the soil surface and clinging to roots.Inner leaves yellowed outer leaves reddish-purple roots stunted and bitter.Round white powdery spots and coating on leaves.Mottled light and dark green patterns on leaves leaves are distorted and may become brittle and easily broken plants are stunted.Leaves appear scorched, yellowed, curled, and wilted.Leaves turn yellow and then brown from the bottom up the plant loses vigor.Leaves curl under, become deformed, and yellowish.Seeds rot or seedlings collapse with dark water-soaked stems as soon as they appear.Here are common carrot-growing problems with cures and controls: Good Products for Pest and Disease Control at Amazon:įor carrot growing tips see Carrot Growing Success Tips at the bottom of this post. Watch for the carrot rust fly, a dark-green fly that lays eggs in the soil near carrots, parsnips, and celery the larvae dig through the soil to the tip of the carrot and eat their way upward. Young thinned carrots can be used fresh in salads.Ĭarrots and parsnips are in the same plant family and are attacked by the same insects and diseases. For the best flavor, lift both crops before they reach maximum size.Ĭarrots and parsnips can be sown thickly later thin both from 2 to 2½ inches apart or more depending upon the variety. Size does not make for more flavorful carrots and parsnips. Carrots can be lifted as soon as they are a usable size.Ĭarrots and parsnips grow best in loose, sandy, humus-rich soil. Harvest carrots when they develop their color and the tops are 1 inch in diameter or smaller.
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