Video: How To Protect Yourself From Pests And Diseases In Cabbage
Caterpillar of the white-headed cabbage
For good yields, the soil for growing cabbage should be neutral or slightly alkaline. A dangerous pest of cabbage is the gluttonous caterpillars of the white whale - cabbage. They are green with dark dots and longitudinal yellow stripes, covered with dense, but very short hairs. Pupae overwinter in an open place, on any vertical surface. Butterflies start flying out early: in April - May.
The number of generations depends on the climatic conditions of the area. Caterpillars feed on leaves, eating them to the veins. Whitewater damages all plants of the cabbage family: turnips, rapeseed, mustard, rutabagas, etc.
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Caterpillars of the smaller white turnip bite into the head of white cabbage or cauliflower, damaging the inner leaves, contaminating them with excrement and causing decay. To prevent lesions, it is recommended to plant cabbage interspersed with tomatoes and celery. Also, when pinching tomatoes, lay out all the trimmed parts of the plant between the cabbage heads.
Eliminate the eggs of cabbage butterflies concentrated on the underside of the leaves by hand. Collect the caterpillars by hand too. For very severe damage, use biological products, for example, "Iskra - double effect" (1 tablet per 10 liters of water, consumption - 1 liter of working solution per 10 m 2), low-toxic preparation "Fitoverm" (5 ml per 3 liters of water, consumption - 1 liter per 10 m?) Or any remedies for leaf-eating caterpillars. Timely covering the plantings with a protective film will also prevent butterflies from laying eggs.
The larvae of the cabbage root latent proboscis beetle at the root collar eat round, hollow galls. These larvae harm not only kale, but also kohlrabi, radish and rutabaga. When spreading this pest, it is recommended to cover the plantings of all named plants with a net. Apply crop rotation and mixed planting with repellent plants in your garden.
Cabbage bugs with a metallic sheen feed on plant juices. In places where they are pricked, yellow spots form on the leaves, the leaves wither and dry out, and the inflorescences of cauliflower are deformed. These insects reproduce especially actively in hot weather at the beginning of summer. To get rid of cabbage bugs, simply dust the plants with wood ash, tobacco dust, or a mixture of both. If a pest is found again, repeat the procedure.
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The cabbage fly has two types - spring and summer. They differ in color and size. Larvae up to 8 cm in length, white, legless, without a pronounced head. The activity of spring cabbage flies coincides with cherry blossoms and rape blossoms when the soil warms up to 8 degrees. The emergence of the summer cabbage fly occurs in mid-June - early July, when the soil warms up to 18 degrees. Fly larvae attack stems and roots.
Over the summer, this fly gives three generations. Its larvae are especially fond of cauliflower. Young plants suddenly begin to wither, acquiring a bluish-lead hue. In the roots of cabbage, radish, radish, rutabaga, burrows eaten by larvae appear, causing woodiness.
For prophylaxis, plant seedlings as early as possible or, conversely, later and never burrow them.
Top dressing with fertilizers, timely watering, hilling increase the resistance of plants to cabbage flies. A mixed planting of cabbage with tomatoes, celery, which scares away flies, is also useful.
Process in summer and during the laying period of flies within a radius of 4–5 cm from plants. Cover plantings with a protective mesh.
Cabbage aphid. Small insects of light gray color with a waxy "down" are located in dense colonies on the underside of the leaves. By winter, they leave black shiny eggs on cabbage stumps and various plants of the cabbage family. In spring, wingless females appear from the larvae, which give birth to live larvae. In spring and in the first half of summer, aphids feed on the testes of cultivated plants and weeds. Then large colonies are formed. Larvae and adult insects feed on plant sap, multiply rapidly, giving up to 16 generations over the summer. Moderately humid and warm years are most favorable for the development of aphids.
The number of aphids is reduced by predators and parasites - larvae of serf flies, ladybugs, larvae of lacewings and hoverflies.
Aphid control - destroy stumps and weeds with hibernating eggs. Place pest-repellent tomatoes next to cabbage. It is recommended to spray with superphosphate extract (10 g per 10 l of water) mixed with potassium chloride (5 g per 10 l). Carry out the first treatment when aphids appear, the second after 15–20 days. Spraying plants with infusions of tobacco, tops of potatoes and tomatoes, onion husks, ash (2-3 times a week), and soap solution is very effective.
Keela - thickening at the roots. Plants wither and die. The fungus that causes this disease persists for a long time in the soil. Therefore, plant cabbage and other cabbage plants in one place after 5-7 years. Loosen the soil constantly. The best prior culture is bows. A direct fight with the keel is almost impossible. In order to prevent the disease, lime the soil to reduce acidity, trying to bring the pH to 7. Add additional lime to the planting holes.