How do you disinfect a flower greenhouse? Master these key points

Before a greenhouse is used, it must be disinfected. The chemicals used for disinfection should vary according to the greenhouse and the types of pests and diseases. In terms of disinfection procedure and content, the following 4 aspects should be addressed:

1. Space disinfection: This should be carried out 7 to 10 days before sowing or planting. For each cubic meter, mix 4 grams of sulfur and 8 grams of sawdust, place it in a container and burn it, preferably at around 7 p.m., then fumigate with the greenhouse sealed for 24 hours. Alternatively, for each cubic meter, mix 1 gram of 25% chlorothalonil and 8 grams of sawdust, ignite it and fumigate for disinfection.

2. Disinfection of greenhouse frames, equipment, tools, etc.: Mostly use a 1:50 to 1:100 formalin aqueous solution to scrub or spray.

3. Soil disinfection: Pesticides should be selected according to the types of pests and diseases in the greenhouse soil, and this should be done 10 to 15 days before planting. In greenhouses where Fusarium wilt occurs severely, a 100-fold to 200-fold formalin solution can be sprayed or poured onto the furrows or the ground, then covered with plastic film for 5 days. After half a month, the chemical will have completely volatilized, and sowing and planting can then be carried out.

For other diseases, a 1000-fold solution of 50% carbendazim, 50% thiophanate-methyl, or 70% dexon can be sprayed on the soil, or made into poisonous soil and scattered, then turned into the soil. In greenhouse plots with underground pests, a certain amount of insecticide can be added during soil treatment.

4. Disinfection of furrows (holes): In plots with severe Fusarium wilt where soil disinfection was not carried out before planting or the disinfection quality was poor, disinfection can also be done in the planting furrows (holes) using 1.25 kilograms of 50% thiophanate-methyl, or 0.75 kilograms of 50% carbendazim, or about 1 kilogram of 70% quintozene per mu. The above chemicals should first be mixed evenly with 1 part powder to 100 parts fine dry soil, and then scattered into the planting furrows (holes).