Coptis pest control law
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1. Powdery mildew (known as “winter melon powder†by drug farmers): It occurs in late May and is seriously damaged from July to August. At the beginning of the disease, round or oval yellow-brown spots appear on the back of the leaf and gradually expand into lesions. The surface of the leaf was spotted brown, grew White Powder, and spread from the old leaves to the new leaves. The white powder gradually covered the leaves of the whole plant, gradually dried the leaves, and the whole plant died. Control methods: 1 adjust shade, increase lighting and pay attention to drainage; 2 early stage of disease, use Qingfengmycin 80 units or 70% thiophanate-methyl 1500 times, spray every 7 to 10 days, even spray 2 ~ 3 times; 3 Breeding disease-resistant varieties, increasing phosphorus and potassium fertilizers to increase plant resistance to disease; 4 Implement rotation. 2. Anthracnose: Onset in early May, oily spots on the leaves, enlarged lesions, purple-brown edges, gray in the middle. Perforation in the center of the late lesions; purple-brown lesions on the petiole were also produced, and the whole plant died when severe. Control methods: 1 winter garden, concentrated diseased leaves burned; 2 with 1:1:100 ~ 150 Bordeaux mixture or 80% mancozeb WP 800 ~ 1000 times spray, spray every 7 to 10 days , Even spray a few times; 3 disease after the removal of diseased leaves, spray 50% carbendazim 800 ~ 1000 times liquid or 60% anthrax Fumei 400 ~ 600 times liquid, 7 days, and even spray 2 ~ 3 times. 3. Biliary disease: often occurs in summer and autumn. The pathogenic bacteria first invaded the roots, and the posterior leaves were purple-brown or orange-yellow, and the entire plant died. White rhizome filaments and rapeseed-like sclerotia appear at the rhizomes. Control methods: 1 The diseased plants were immediately removed and burned, and the diseased points were treated with lime powder, or watered with 50% carbendazim WP 800 times; 2 The disease was sprayed with 50% TBV 500 times, 7 days 1 Times, 2 to 3 times in a row; 3 and corn rotation for more than 5 years. 4. When: parasites in the roots of berberine, sucking juice with a sucker, so that the growth of berberine to stop, in serious cases, the whole plant withered. Control methods: 1 When parasites were found, roots and soil were dug together and replaced with new soil; in the middle and middle of the month of 27th, before the seeds matured, combined weeding would be eliminated. 5. Aphid: It is a mollusc. It can be damaged during the whole growth period of Coptis chinensis and it can eat fresh leaves. During the daytime, it is lurking in the damp and wet place, and it is harmed to climb out at night. It is heavier to rain. Control methods: 1 Use 50% phoxim 0.5 kg and 50 kg of fresh grass to mix wet, and then throw it into the field in the evening to slay and kill; 2 Lime around the rake to prevent worms from crawling into the casket. 6. 蛴螬, è¼è›„: bite the base of the petiole. Control methods: 1 Organic fertilizer should be fully cooked or killed by high temperature compost to kill pests before use; 2 with black light trap to kill the adult, the lamp placed under the container of insects, the amount of water inside, the water drops a little kerosene; 3 wheat bran fried Fragrant, with 90% crystal trichlorfon 30 times, the bait mix wet or fresh grass cut into 3 ~ 4 cm long, with 50% phoxim EC 0.5 kg wet, spread in the evening around the trap to kill. 7. Rat pests and animal pests: scorpions, golden pheasants, rodents, etc., damage the young leaves, calyx, seeds and even rhizomes. Preventive measures: 1 Set up a fence to prevent the beast from entering; 2 Spread the mouse drug into the field or mouse hole.