What about the key points for selecting flour mesh?...

Our first suggestion for everyone is to install 60-mesh insect-proof nets on the upper and lower air vents of the greenhouse. This can completely shield the pests such as Bemisia tabaci outside the greenhouse, and prevent virus-borne pests from bringing viruses and other germs outside the greenhouse into the greenhouse. Reduce the incidence of vegetables. However, this also has a great impact on the ventilation and cooling of the greenhouse. Even if the shading net is used to reduce the temperature, the temperature in the shed is still high due to the poor air circulation in the shed, and the maximum temperature in the shed is still maintained above 35 ° C.

The nylon mesh is a new type of agricultural covering material. It uses high-quality polyethylene as a raw material, and adds anti-aging and anti-ultraviolet chemical auxiliaries. It is made by drawing and weaving. It resembles a window screen. Proper storage life can reach about 3 to 5 years. Vegetable pest net cover cultivation is to build artificial isolation barriers on the scaffolds to prevent pests from being cut out of the net, cut off the breeding paths of pests, effectively control the spread of various pests and prevent the harm of virus transmission, and greatly reduce the use of pesticides. It is a new, simple, scientific and effective anti-insect measure.

The nylon mesh insect net has less shading. It is not necessary to cover the day and night or the front cover and the back. It should be covered in the whole process to give the insects no chance of invasion in order to receive a satisfactory insect control effect.

Soil disinfection.

After the previous crop is harvested, remove the residue and weeds from the field in time and burn them intensively. 10 days before the construction of the shed, flood the vegetable field surface with water for 7 days, drown the eggs and aerobic germs of the ground and underground pests, and then eliminate the accumulated water and let the sun be exposed for 2-3 days. insect. At the same time, the insect net should be compacted and tightly sealed to prevent pests from infiltrating the eggs. When the small arch shed is covered and cultivated, the arch shed should be higher than the crops, to avoid the vegetable leaves close to the insect net, to prevent pests such as yellow stripe jumpers outside the net from eating vegetable leaves and laying eggs on the vegetable leaves.

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