Main points of strawberry pest control
Main pest and disease control points of strawberry: Powdery mildew: Powdery mildew in strawberry nursery is common due to less rain in May-June this year. However, since the strawberry was planted in mid-September, the temperature in our province has been high, the farmers have continued to irrigate, and the humidity in the shed is too large. At present, the field powdery mildew has a multi-faceted situation. It is expected that this year's winter and spring powdery mildew will occur. Botrytis: It is expected to occur lightly, but in the case of continuous rainy weather, the hazard will increase. Aphids: Because the temperature and humidity in the shed are suitable for their occurrence and reproduction, it is difficult to completely prevent and control. In addition, the current number of locusts is high. It is expected that the locusts will be heavier, especially after March next year, the damage will gradually increase, and the ruined land may reach From large to very large. Apes: It is expected that the middle will occur lightly. Control method Strengthen the management of the shed, pay attention to insulation, ventilation and humidity. Apply agricultural and physical control measures to control the occurrence and harm of pests and diseases. Promote the application of hose drip irrigation and full coverage of the film (covering the ridges of the Qiliangou) or padding the rice straw in the ditch to control the air humidity in the greenhouse and prevent the flooding of the strawberry production area. Timely clean up the diseased leaves and diseased fruits in the strawberry production field and concentrate on destruction, and use the matching agent to kill and reduce the source of infectious diseases. It was found that the diseased strains of Verticillium wilt and anthrax were removed in time. The strawberry garden topdressing advocates the use of ternary compound fertilizer and avoids applying nitrogen fertilizer. Do a good job in the opening and closing management of greenhouse film, improve ventilation and light transmission conditions, especially when it is cloudy after fertilizing water, it should be opened in time to avoid harmful gas such as ammonia and nitrogen. Choose the right medicine, scientific and rational use of medicine. In the case of chemical control, priority is given to using biological pesticides such as plant sources and high-quality mineral oils. According to the regulations for the production of pollution-free strawberries, it is strictly forbidden to use highly toxic and high-residue pesticides, and strictly observe the safety interval of pesticides. Powdery mildew : In the early stage of the disease, you can use 99.1% mineral oil emulsifiable concentrate 300 times solution or 50% ether oxystrobin dry suspension agent 3000 times solution or 62.25% myclobutanol·manganese zinc wettable powder 600 times solution or 5% hypertonic myclobutanil 1500 times liquid or 40% fluorosilicone emulsifiable concentrate 4000 times liquid control. It can also be controlled by fumigation of “one smoked spirit†smoker. Each standard shed (6m×30m) will be put three times at a time, fumigation at night, and even 3-4 times of smoking, 7 days apart. Botrytis cinerea : For prevention, use 40% pyrimethanil suspension 800 times solution or 50% vinyl nucleoside dry suspension 1000 times solution or 80% mancozeb WP 800 times or 50% Isobacteria wettable powder 800 times liquid or 50% procymidone wettable powder 800 times liquid or 75% chlorothalonil wettable powder 800 times liquid spray control, spray every 7-10 days, even spray 2-3 Second, pay attention to the alternating medication. It can also be controlled by fumigation of “one smoked spirit†smoker. Each standard shed will be put three times at a time, fumigation at night, and even 3-4 times of smoking, 7 days apart. Verticillium wilt: When the Verticillium wilt strain is found, it is removed and replanted in time. After replanting, it is treated with 10% anti-lingering agent 80 times solution or 8% Ningnanmycin water 1000 times solution. Anthrax: When the diseased plant is found, it is removed and replanted in time. After replanting, use 25% prochloraz oil 1000 times solution or 80% Dasheng M-45 wettable powder 700 times solution or 20% thiabendone suspoemant 400 times. Liquid and other watering control, continuous control 3-5 times. Aphids: In the spotting period, 0.3% azadirachtin emulsifiable concentrate 1000 times solution or 70% imidacloprid water dispersible granules 10000 times solution or 5% acetamiprid WP 1500 times solution can be used for spray control. 螨 class: remove the worm leaves in time to reduce the source of insects. Before the flowering of the strawberry, when the amount of each leaf is 2-3, use 9.5% quinacridone EC 2000-3000 times or 15% 哒螨 乳 1500 1500 or 5% thiazolone 1200 times. Or 57% acetylene emulsifiable concentrate 2000 times liquid and other spray control. The effect of adding 99.1% green geranium 300 times solution to each of the above agents is better. 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