Cucumbers in greenhouses have higher temperature and humidity than open areas and are more susceptible to pests and diseases. In order to achieve the goal of pollution-free vegetable production, the “prevention-oriented, comprehensive prevention and control†policy should be implemented in the prevention and control of cucumber diseases and insect pests in greenhouses, aiming at different periods of temperature and humidity. Conditions and different diseases adopt different agricultural measures, biological control methods, physical control methods, improve and optimize the ecological environment of greenhouses, diagnose pests and diseases as soon as possible, grasp the symptomatic use of drugs in the early stages of disease and pests, preferentially use dust method and smoke method, and alternately use different categories. Pollution-free pesticides and strictly observe safety intervals.
1. Physical control: Use the shade net to control the temperature and use the insect net to reduce the pests.
2. Ecological control: Do a good job of temperature control, control the temperature during the day at 25-30°C, and control the temperature at night from 12-15°C. Prohibit flood irrigation, control the relative humidity below 85%, try to keep the leaves from condensation, or reduce the condensation time. Use high temperature stuffy sheds to prevent downy mildew.
3, chemical control:
(1) Downy mildew: 80% Dasheng M-45, 70% mancozeb, 70% chlorothalonil, 70% EDMA, 40% georgine 800-1000 times spray, or 45% chlorothalonil smoke agent 200-250 g per mu, divided into 4 to 5 places in the shed, ignited with dark fire, smoked in a closed greenhouse, the next morning ventilation, or 5% chlorothalonil, 10% 1 kg of anti-mildulin powder is sprayed in the morning or evening.
(2) Bacterial keratoderma: It can be used to control 500 times of agricultural bacteria in North China.
(3) Botrytis cinerea: In the early stage of disease, 50% procymidone (Sulfacin) 1500 times, 65% jebumycin or 50% polymyxin (Doxymil) 1000 times, 50% carbendazim are alternately used. Or 70% thiophanate-methyl spray 800 times, spray once every 7~10 days, or use 10% procymidone or 45% chlorothalonil smoke agent 250 grams per acre smoke, or spray in the evening 5% chlorothalonil dust agent, 1 kg per mu, spray once every 10 days or so.
(4) Powdery mildew: At the beginning of the disease, use 20% Triadimefon EC or 25% triadimefon WP 1500 times, or 12.5% ​​diniconazole or 25% Myclobutanil WP 3000 times, or 4% NR 120 Water 500 to 600 times spray agent.
(5) Epidemic disease: At the beginning of the disease, 25% metalaxyl was used as the initial disease, 50% EDHM or 64% oxaprozin manganese bromide (antivirulent) 400 times, 72% urea manganese zinc (glucose) Or 70% chlorothalonil or 40% georgine 600~800 times spray.
(6) Gualou: Can be sprayed with 10% imidacloprid wettable powder 1500 times or 2.5% D deltamethrin cream 2000 times, or 10% smoke smoke smoke.
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