What are the common pests and diseases of the heavy building? How to effectively prevent pests and diseases?
Heavy medicinal resources, such as rot disease, root rot, stem rot, leaf spot, brown spot, gray mold, etc.; common pests in heavy buildings include underground pests, noctuids, thrips, red spiders, plaques Snorkeling, etc., so we must master the corresponding pest control measures when planting heavy buildings, and then Xiaobian will specifically talk about the prevention and control measures of these pests and diseases. (1) Diseases 1. Tripping disease a. Hazard: The disease is a disease at the seedling stage. Generally, the disease is severe when it is cold and rainy from April to May. Symptoms of the disease are from the base of the stem, the initial onset is water-stained, and quickly spread to the ground, and sometimes the cotyledons or leaves are still green when they suddenly fall; b. Control method: select disease-free seeds or seedlings; seedbed is mixed with 50% carbendazim WP 600 times solution + 58% metalaxyl Mn-Zn wettable powder 600 times solution; Frosting Manganese-Zinc WP 600 times solution, 68.75% silver-Fly (Fluoridum and Downy Mildew) Suspension 2000 times liquid to pour plants and root soil. 2. Root rot a. Hazard: damage to the underground rhizome. After the infection of the pathogen, the root system gradually turns yellow-brown and rot, and the edge of the upper part of the leaf turns yellow and banana, causing the whole plant to die and the leaves to dry up; b. Control method: choose sloping cultivation to avoid wind and sun; mix seedlings with grass ash when sowing or transplanting, use 75% chlorothalonil 600 times solution, 25% metalaxyl manganese hexahydrate 600 times solution, 70% generation for initial onset One of the liquids of Senn Manganese Zinc 600 times solution, 64% antivirus 矾 600 times solution, 80% carbendazim 500 times solution, etc.; when underground pests are found, it is sprayed with 50% phoxim emulsifiable concentrate 800 times. Root control. 3. Leaf rot a. Hazard: harms the leaves and stems of the plants, and produces water-stained small spots at the initial infestation, resulting in decay and pour of the roots and stems; b. Prevention and treatment methods: in winter and spring, the dead branches should be removed, the diseased leaves should be burnt down, and the wintering base of the pathogen should be reduced. In the early stage of the disease, 58% of the toxic mycelium 500 times solution, 72% of the metalaxyl manganese zinc 600 times solution, and 75% of the bacteria are used. One of the liquid medicines such as 600 times liquid, 80% mancozeb 500 times liquid, and 68.75% silver method (fluorine bacteria, chlorfenapyr) 2000 times liquid is sprayed and prevented. 4, leaf spot disease a. Hazard: It is mainly caused by damage to leaves, low-lying water, poor ventilation, insufficient light, improper fertilizer and water, etc. b. Prevention and treatment methods: timely clear the treatment of serious diseased leaves; use 50% carbendazim, 30% fulfluring (fluoxazole) 1000 times solution for 10 minutes before transplanting; 75% chlorothalonil 100 at the beginning of the disease One solution of doubling solution, 40% Fuxing (flusilazole) 3000 times solution, 10% Shigao (oxyxazole) water-dispersible granules, 30% Teflon (fluoxazole) wettable powder 1000 times solution, etc. Spray leaf control. 5. Brown spot a. Hazard: In the early stage of the disease, the diseased part is water-stained, then chlorotic and yellow, and the lesions expand or develop with the disease, the lesions merge, and the edge of the leaves is swept; b. Prevention and treatment methods: timely remove and destroy the diseased body; increase the application of organic fertilizer to improve the disease resistance of the 滇é‡æ¥¼; use the chemical control in the early stage of the disease, and refer to the leaf spot disease agent for disease control. 6, gray mold a. Hazard: Mainly infecting leaves, stems and flower buds, water-stained plaques at the beginning of the disease, the diseased part gradually expands, and the gray part of the diseased part is formed in the later stage; b. Prevention and treatment methods: timely clearing and destroying the sick body; paying attention to drainage and reducing humidity; increasing the application of organic fertilizer to improve the disease resistance of 滇é‡æ¥¼; 40% Mingdi (fluazidin + iprodione) 3000 times in the early stage of the disease One of the liquid, 40% pyrimethanil 1000 times solution, 50% boscalid 1200 times solution, 50% quick-knot 2000 times solution, sprayed and sprayed the plant. (2) Pests 1. Underground pests a. Hazard: underground pests include cockroaches, tigers, and golden worms, which mainly damage the base of the roots and tender stems; b. Control method: deep-turn the soil in autumn and winter; apply decomposed organic fertilizer to prevent adult eggs from spawning; use 50% phoxim emulsifiable concentrate 1 000 times solution and 10% imidacloprid 1500 times solution to prevent and control the adult. 2. Leaf miner a. Hazard: The larvae drilled the leaf tissue of the host leaf tissue, causing the leaves to wither and fall, and the yield decreased; b. Control methods: ploughing the soil before sowing, removing weeds and removing the worm leaves to burn or deep burying; adult worms use yellow worms or 3% brown sugar liquid plus a small amount of trichlorfon crystals to spray and trap adults In the case of leaf sporadic insects, one of the agents is sprayed with 1.8% avermectin EC 2000 times solution, 40% speed smashing 1000 times solution, 1.8% Affordin emulsifiable concentrate 1500 times liquid solution. 3. Red spider a. Hazard: yellow needle-like spots appear on the leaves, causing the plants to grow weak; b. Control method: thoroughly remove the dead leaves and surrounding weeds after harvesting; use 75% Bileba WP 1500 times solution, 10% imidacloprid 1500 times solution or 4% chlorpyrifos 2000 times solution. A kind of positive and negative spray control of the blade. 4. Thrips a. Hazard: The species of thrips mainly include flower thrips, melons, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses, horses b. Control methods: remove the weeds and dead branches in the field, burn them out or bury them deeply; use the blue plate to trap the adults; use sporadic 10% imidacloprid 1500 times, 5% acetamiprid 2000 times, 20% chlorpyrifos EC One of the 1500 times, 4.5% high-chlorine emulsifiable concentrate 1000 times, 5% cypermethrin 1000 times, etc., is sprayed on the front and back sides of the blade. 5, locusts a. Hazard: The adult nymph and the nymph suck the sap of the young leaves to make the leaves yellow and the growth of the plants blocked; b. Prevention and treatment methods: pay attention to water spray and drought resistance; make winter weeding and tumbling, clean the field; use one of imidacloprid, acetamiprid and matrine according to the instructions for use. 6. snails a, hazard: mainly harmful sprouts, leaves; b. Prevention and treatment methods: artificially catching after rain or stacking grasses in the drainage ditch; sporadic occurrence of 90% trichlorfon crystal 1000 times liquid, 50% phoxim 1000 times liquid, 48% scorpion 200 times liquid and other pharmaceutical sprays Control. 7.è›žè“ a, lurking during the day, feeding on the leaves of plants at night, directly affecting the growth of the heavy building; b. Prevention and treatment methods: keep the dry environment, remove the pastoral and autumn ploughing and destroy the habitat; apply fully decomposed organic fertilizer; use 48% scorpion emulsifiable concentrate or 6% snail granules to prepare bean cake with about 4% active ingredient. Powder or corn flour bait, thrown in the field on the evening to lure.
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