Control cotton pests and diseases during wintering

From the harvest of cotton to the second year of planting, it is the wintering period of cotton pests and diseases. During this period, the pathogens and pests of cotton hide in winter and sleep in various places. Grasping the favorable timing of the wintering dormancy period for prevention and control can reduce the number of pests and diseases in the coming year and receive twice the result with half the effort.

A variety of pests and diseases in cotton fields such as cotton bollworm, ground tiger, tick, and worms are all hidden in the soil for winter, and can be killed by deep irrigation. In winter, the winter irrigation is deeply cultivated, which destroys the living environment of the pests and diseases. Generally, more than 30% of the overwintering insects can be reduced, and the mortality of cotton bollworms can reach more than 90%. Deep ploughing depth of 30 ~ 40 cm, turn the topsoil to the bottom, the bottom soil turned to the top, to facilitate the weathering of the winter. Winter irrigation should be carried out in three or nine days. It should be irrigated and filled. The amount of water per mu should be 80-100 cubic meters. The clay should be filled slightly. The way to use the ditch irrigation is good, avoid heavy water and slow irrigation.

Clean cotton fields, such as red bollworm, red spider, aphid, anthracnose and blight, can overwinter the dead branches, fallen leaves, rotten bells and weeds left in cotton fields, completely remove dead branches, fallen leaves, rotten bells, and eradicate the fields. And weeds around, can effectively eliminate wintering pests. The debris should be burned or buried deeply in time, and should not be piled up on the edge of the field.

Eliminate the overwintering host cotton leafhopper, cotton red spider, cotton aphid, small tiger and other pests to winter over the cotton field inside or outside the ditch weeds, or use weeds as an early spring activity. Therefore, combined with winter planting fertilizer to remove weeds, many pests can be eliminated. It can also be sprayed on weeds in the spring of next year for prevention and treatment. In addition, hibiscus, pomegranate and pepper tree are not only the wintering host of cotton aphid, but also the host of the early spring field. In winter and spring, the method of cutting trees, pruning and spraying is used to treat hibiscus and pepper trees, which is to eliminate the first and second generation cotton mites. It is a good way to reduce the damage to rape and cotton.

A variety of pests such as anthrax, keratosis, red rot and red bollworm can be attached to the inside and outside of the seed for wintering. When the storage warehouse is sealed, 32-37 grams of methane bromide is smoked per cubic meter of space and sealed for 3 days, which can kill 98% of the cotton bollworm and some pathogenic bacteria. It is also possible to put the cotton seed in the "three open and one cool" hot water (water temperature about 65 ° C) to stir and soak, the insecticidal sterilization effect is also very good.

Elimination of the storage site The cotton larvae of the cotton bollworm are mainly hidden in the gaps in the walls of the warehouse where the cotton is stored and in the gaps between the drying and storage tools. Therefore, before the cotton is stored, the wall in the warehouse can be sprayed with lime slurry to fill the gap, and then sprayed on the wall with 100% dichlorvos emulsion 100 times, sealing the doors and windows, and poisoning the red bollworm. Use tools that are used for drying and storage, spray with boiling water or spray with insecticide to eliminate potential larvae. If soaked in water for one week, the insect removal effect is better.

From the harvest of cotton to the second year of planting, it is the wintering period of cotton pests and diseases. During this period, the pathogens and pests of cotton hide in winter and sleep in various places. Grasping the favorable timing of the wintering dormancy period for prevention and control can reduce the number of pests and diseases in the coming year and receive twice the result with half the effort.

A variety of pests and diseases in cotton fields such as cotton bollworm, ground tiger, tick, and worms are all hidden in the soil for winter, and can be killed by deep irrigation. In winter, the winter irrigation is deeply cultivated, which destroys the living environment of the pests and diseases. Generally, more than 30% of the overwintering insects can be reduced, and the mortality of cotton bollworms can reach more than 90%. Deep ploughing depth of 30 ~ 40 cm, turn the topsoil to the bottom, the bottom soil turned to the top, to facilitate the weathering of the winter. Winter irrigation should be carried out in three or nine days. It should be irrigated and filled. The amount of water per mu should be 80-100 cubic meters. The clay should be filled slightly. The way to use the ditch irrigation is good, avoid heavy water and slow irrigation.

Clean cotton fields, such as red bollworm, red spider, aphid, anthracnose and blight, can overwinter the dead branches, fallen leaves, rotten bells and weeds left in cotton fields, completely remove dead branches, fallen leaves, rotten bells, and eradicate the fields. And weeds around, can effectively eliminate wintering pests. The debris should be burned or buried deeply in time, and should not be piled up on the edge of the field.

Eliminate the overwintering host cotton leafhopper, cotton red spider, cotton aphid, small tiger and other pests to winter over the cotton field inside or outside the ditch weeds, or use weeds as an early spring activity. Therefore, combined with winter planting fertilizer to remove weeds, many pests can be eliminated. It can also be sprayed on weeds in the spring of next year for prevention and treatment. In addition, hibiscus, pomegranate and pepper tree are not only the wintering host of cotton aphid, but also the host of the early spring field. In winter and spring, the method of cutting trees, pruning and spraying is used to treat hibiscus and pepper trees, which is to eliminate the first and second generation cotton mites. It is a good way to reduce the damage to rape and cotton.

A variety of pests such as anthrax, keratosis, red rot and red bollworm can be attached to the inside and outside of the seed for wintering. When the storage warehouse is sealed, 32-37 grams of methane bromide is smoked per cubic meter of space and sealed for 3 days, which can kill 98% of the cotton bollworm and some pathogenic bacteria. It is also possible to put the cotton seed in the "three open and one cool" hot water (water temperature about 65 ° C) to stir and soak, the insecticidal sterilization effect is also very good.

Elimination of the storage site The cotton larvae of the cotton bollworm are mainly hidden in the gaps in the walls of the warehouse where the cotton is stored and in the gaps between the drying and storage tools. Therefore, before the cotton is stored, the wall in the warehouse can be sprayed with lime slurry to fill the gap, and then sprayed on the wall with 100% dichlorvos emulsion 100 times, sealing the doors and windows, and poisoning the red bollworm. Use tools that are used for drying and storage, spray with boiling water or spray with insecticide to eliminate potential larvae. If soaked in water for one week, the insect removal effect is better.

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