Prevention and cure method of vegetable pests and diseases in greenhouse

Due to the special ecological environment of greenhouse vegetables, the occurrence of many pests and diseases, rapid expansion, and serious damage are the most prominent problems in current production. Several simple prevention methods are introduced below.

High temperature suffocating method. 1 before the seedlings shack. After the greenhouse is built, it is chosen to cover the shed film on sunny days and seal the shed for 7-10 days to make the temperature inside the shed reach 60 °C or above to kill the spores and eggs on the soil surface and the wall, and reduce the disease during the vegetable production period. Probability. 2 with a seedling shed. A few days before the seedling shed, you should pour water once, carry out a field cleaning, remove the diseased leaves and old leaves, take them out of the shed, spray a protective agent, assist the shack, and choose sunny at noon, will hang the shed Closed, so that the temperature inside the shed rises to 42-45 ° C, keep 2 hours, after the treatment, the vents can not be suddenly enlarged, to slowly cool down, and strengthen management, each treatment is separated by at least 7-10 days, to be strictly controlled Good temperature, if the shed temperature is lower than 42 ° C, the effect of inhibiting the bacteria is not good, higher than 45 ° C, the plant is easily injured.

Seed treatment method. Pests are often lurking or mixed in vegetable seeds, and seed treatment before sowing can control the spread of some pests and diseases. The more commonly used seed treatment can be treated by warm soaking and chemical treatment. Soaking seeds (vegetable seeds) are usually soaked in warm water of 50-60 ° C for 5-15 minutes, stirring constantly during soaking, so that the seeds are evenly heated; 0.1% cuo4, 0.1% kmno4 or 300 times of Forma can be used for the treatment. For soaking in the forest, it can also be mixed with 50% carbendazim WP according to the ratio of 0.3%-0.4% of the seed amount.

Soil insecticide method. According to the regularity of perennial pests and diseases, select appropriate appropriate agents and mix appropriate amount of fine soil to mix well, evenly spread the surface, and then plow the soil into the soil for insecticide. The disinfection of the seedbed can be carried out by means of the upper and lower cover. It is necessary to keep the surface of the bed surface moist to avoid phytotoxicity. Spray control method. When chemical defense is used, it should be scientifically and rationally used. First, according to the type of pests and diseases, choose appropriate pesticides for prevention and control; second, according to the law of occurrence of pests and diseases, strictly control the optimal prevention period and the optimal dosage, so as to timely and appropriate medication. Third, we must take into account the long-term effects of spray control, and use pesticides alternately to prevent the development of resistance to pests and diseases. Fourth, when multiple pests and diseases occur simultaneously, the drugs should be mixed so that one drug can prevent the occurrence of various pests and diseases; According to the weather changes, the pesticide dosage form and application method can be flexibly selected. Sixth, the pesticide operation and use procedures should be strictly implemented to avoid poisoning accidents.
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