In the growth process of autumn cabbage, it is very scarce to the earthworms (also known as the roots and roots), which eats the epidermis of the roots of Chinese cabbage and causes the pathogens in the soil to sneak in and out, causing the Chinese cabbage to help rot, not only reducing the yield of Chinese cabbage, but also affecting it. The edible value of cabbage. Failure to prevent and treat in time can cause damage to all fields and serious damage to vegetable farmers. The mantle that harms autumn cabbage is a larva of a radish fly. It is a oligophagous pest that mainly harms cruciferous vegetables such as cabbage and radish. First, the characteristics of occurrence Radish flies occur in each place for 1 generation every year, and they spend more than 10 months in the dormant winter. The second year of adult emergence begins mainly in early August and continues until late September. The middle and late August is the most prosperous period. Adults come out in the morning, evening or on a cloudy day every day. When sunlight is strong at noon, they are hidden in the shade of Chinese cabbage. In autumn, the climate is warm and humid, and occurs seriously. In the first 2 days after rainfall or irrigation, the number of adults significantly increases. After the adult was unearthed, eggs were laid on the topsoil of the first and second layers of the outer layer of the Chinese cabbage plant and on the surface soil around the base or soil seam around the base for 7 days. The eggs were hatched for 4 to 7 days as larvae and the larval period was about 30 days. After the emergence of the larvae, they first ate the base of the petiole adjacent to the root of the cabbage and the surrounding vegetable rags, and then ate the roots of the cabbage, which was a curved insect path or hole. When the temperature dropped, the damage was aggravated and the soft rot of the cabbage was easily induced. Second, control methods 1. Soil treatment. Prior to planting Chinese cabbage, 2.5 to 3.5 kg of phoxim granules per acre can be used, mixed with fertilizers and applied to the soil to kill the eggs and larvae of the flies. 2. Sweet and sour trapping. According to the characteristics of the radish flies having sucking sweet and sour liquid, the sedation was carried out. With sugar 0.5 kg, vinegar l kg, water 7.5 kg, plus 20 grams of trichlorfon powder, made into a mixture, in early August or so, in the field every 8 to 10 meters to dig a bowl of big pit, press Put the size of the pit into a plastic bag, pour 100 grams of the mixture, and add a mixture every 10 days or so to kill large numbers of adults. 3. The ground spray. When the Chinese cabbage grows to 2 or 3 true leaves, or 2.5% of trichlorfon powder per acre, 1 to 1.5 kg per mu, or 0.5 to 1 kg of dimethoate powder per acre, field ground dusting to prevent seed fly Into the field spawning. 4. Vegetable root application. When Chinese cabbage grows to 6-8 leaves, it can be mixed with grass ash, lime powder and 2.5% trichlorfon powder in a ratio of 2:1:1. It is applied around the vegetable root to prevent the fly from laying eggs and killing the soil. Pre-larvae. 5. Medication Irrigation. When it is found that the Chinese cabbage in the field is damaged by roots, 90% of crystals of trichlorfon 1000 times, or 40% of dimethoate 1500 times, and 50% of phoxim EC 2000 times can be used for irrigation. Root, about 200 grams of liquid per strain, so that the medicine flow from the heart of the cabbage to the rhizosphere, to ensure that the roots of soil moisture, the general irrigation root 1 or 2 times, you can kill the earthworms. Topdressing ammonia can also prevent the occurrence of mantle. About 30 days after the cabbage is planted, use 1 kg of ammonia water, add 1 kg of clear water, and mix thoroughly and then irrigate the roots. Fill about 150-200 grams per plant. Or combined with the autumn cabbage irrigation, the ammonia slowly poured into the running water for furrow irrigation, this will not only prevent the occurrence of mantle, but also play a role in top dressing. Adult diapers are disposable urinary incontinence products, one of the adult care products, and a disposable diaper mainly suitable for incontinent adults.
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Prevention and treatment of autumn cabbage manure