Several points should be paid attention to in disinfection of plastic greenhouse

Space disinfection should be carried out 7-10 days before sowing or planting. Each cubic meter with 4 grams of sulfur, 8 grams of sawdust mixed evenly, burning in the container, the time should be carried out at 7 o'clock in the evening, smoking sealed for 24 hours. You can also mix well with 25% chlorothalonil and 8 grams of sawn wood per cubic meter, ignite fumigation and sterilize.

Facilities disinfection scaffolding, equipment, tools and other disinfection can be washed or sprayed with 1:50-1% formalin aqueous solution.

Soil disinfection should be carried out 10-15 days before planting according to the types of diseases and insect pests in greenhouse soil. In the greenhouse where Fusarium wilt occurs seriously, 100-200 times formalin can be sprayed on the border or ditch surface, and then covered with film for 5 days. after half a month, all the chemicals have volatilized, and then they can be sown and planted. Other diseases can be sprayed with 1000 times of carbendazim, 50% topiramine or 70% dimethazone, or made into poisonous soil and turned into the soil. In the greenhouse with underground pests, a certain amount of pesticides can be added to the soil treatment.

Ditches (ponds) disinfect seriously wilted plots, and if the soil is disinfected or the disinfection quality is not good before planting, it can also be disinfected in the planting ditches (ponds). Disinfect with 50% thiophanate 1.25 kg or 50% carbendazim 0.75 kg or 70% pentachloronitrobenzene 1 kg per mu. The above chemicals should be mixed evenly according to 1 part of powder and 100 parts of fine dry soil, and then sprinkled in the planting ditch (pond).