Simple Control Method for Pests and Diseases in Greenhouse Vegetables

Due to the special ecological environment of greenhouse vegetables, the types of diseases and insect pests are numerous, rapid expansion and heavy damage, which are the most outstanding problems in current production. Through several years of observation and practice, I have found out the following methods of prevention and control. High temperature stuffy shed method before the seedlings stuffy shed. After the shed is completed, choose to cover the greenhouse with sunny days and close the shed for 7-10 days so that the temperature in the shed can reach 60°C or more. This will kill pathogenic spores and eggs on the soil surface and walls and reduce the production period of the vegetables. Infection probability. With Miao bored shed. With a few days before the Mong Mong shed, it is necessary to pour water for a field cleaning. Remove diseased leaves and old leaves, and take them out of the shed, spray a protective agent, and assist the stuffy shed. And select sunny noon, the greenhouse closed, so that the temperature within the shed rose to 42 °C - 45 °C, maintain 2 hours. After the treatment is completed, the vents must not be suddenly enlarged, and the temperature must be gradually reduced and the management must be strengthened. Each treatment is separated by at least 7-10 days. To strictly control the temperature, if the greenhouse temperature is lower than 42 °C, the effect of inhibiting bacteria is not good. Above 45 °C, the plants are easily injured. Seed treatment methods The pests are often hidden or mixed in vegetable seeds. Seed treatment before sowing can control the spread of some diseases and insect pests. The more commonly used seed treatments can be treated with warm scalding and chemical treatment. Hot soaking (vegetable seeds) is generally soaked in warm water of 50°C--60°C for 5-15 minutes. When soaking, the seeds should be constantly stirred so that the seeds can be heated evenly; the agent can be treated with 0.1% CuSO4, 0.1% KMnO4 or 300 times Formalin soaking seeds can also be seeded with 50% carbendazim WP in a ratio of 0.3% to 0.4%. The soil insecticide method according to the law of the annual occurrence of pests and diseases, targeted use of appropriate agents and appropriate amount of fine soil and mix well, evenly spread the surface, and then plough into soil for soil insecticide. Seedbed disinfection can be carried out using the method of laying on the cover, pay attention to keep the surface of the bed moist, so as to avoid phytotoxicity. When chemical spraying of the anti-epitaxic method is used, scientific and rational use of drugs should be used. First, according to the types of diseases and insect pests, appropriate pesticides should be selected for prevention and control; secondly, according to the occurrence and damage of pests and diseases, the optimal control period and the optimal dosage should be strictly controlled. Doing timely and appropriate use of medicines; Third, to take into account the long-term effects of spraying control, alternating use of pesticides to prevent pests to produce resistance; Fourth, when a variety of diseases and pests occur at the same time, mixed medication, making a medication can prevent and control a variety of pests Occurrence; Fifth, according to the changes in the weather flexible selection of pesticide formulations and application methods, six must strictly implement the pesticide operation and use procedures, so as not to cause poisoning accidents.

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