The vegetable in the greenhouse was at the end of the growing season, and the vegetable farmers began to pull out the garden. However, many vegetable farmers have no choice but to clear the garden and not clear the garden. Some farmers have even cut off the trees and left a lot of roots in the soil. This is contrary to the purpose of “cleaning the pastoral†to prevent pests and diseases.
Many vegetable farmers untied the nylon rope and put the dried stems on the ground. The stems of the sheds have dried up, and there are many spider-like nets at the junction of these nylon and iron wires. It is the net of the red spider knot. It turned out that the greenhouse crop did not promptly control the red spider, causing the outbreak of the pest, and pulled out the garden early, but he only pulled out the tree and did not clean it out of the shed in time. When the debris was cleaned up in a few days, A large number of red spider webs were found on the nylon rope.
The technical teacher believes that the uncultivated garden is a big mistake for pest control. In this way, in order to be light at the moment, the plants are dried and then cleared out of the garden, so that the pests such as spider mites have sufficient time to hide or lay eggs to sleep, and adults, eggs, etc. fall to the ground or enter the soil, increasing the difficulty of prevention and control. The next vegetable management has buried hidden dangers. Of course, it is not only a pest of red spider. In recent years, small insects such as whitefly, thrips and other diseases, and various diseases, will choose to sneak into the soil or produce spores in the harsh environment such as high temperature, and improve the resistance to harsh environments. ability.
The correct approach should be:
Immediately after the gardening, the trees are cleaned out of the shed, and the mulch film and weeds in the shed are all cleaned up, and then the high temperature shack or the agent is used to fumigate to minimize the pathogen, minimize the number of pests and reduce the number of the pests. A glimpse of the threat of vegetables.
There is also a common mistake in gardening, that is, some vegetable farmers have only cleaned out the stems for easy cleaning, and a large number of roots remain in the soil. This is also wrong. Because there are a lot of harmful pests and diseases in the soil, after the roots die, they will multiply in the residual roots and become the "bane" of the next vegetables. In particular, various root rots, stem-based rot, bacterial wilt, blight, and root-knot nematodes have already occurred in the sheds, and the roots must be thoroughly cleaned.
The sheds where the root-knot nematode occurs are more important. It is a good time to eliminate the root-knot nematodes when the garden is removed. This opportunity can be used to bring the root-knot nematodes attached to the roots to the surface, using high-temperature shacks or chemicals. Easily kill root knot nematodes. There are fewer plant residues in the soil, and the number of pathogens attached to it is naturally reduced, which can greatly reduce the chance of infection of pests and diseases of the lower crops. The removal of roots in the soil after planting the garden can also reduce the amount of self-toxic substances in the soil and reduce the risk of heavy mites.
It is best to pull out all the roots when the vegetables are pulled out. If the soil is dry, you can gently pour a water before the gardening to moisten the soil for easy extraction. If necessary, excavate with iron shovel to avoid a large amount of root breakage remaining in the soil. In addition, it is best to mark the place where the diseased plant is used before the gardening. After the garden is removed, the limestone and disinfectant should be treated with the focus on the surrounding area to completely eliminate the bacteria.
Smd Led Chip,Led Chip Smd 5050,Rgb Smd Led Chip,High Performance Smd Led Chip
Shenzhen Huangtai Photoelectric Co.,Ltd. , https://www.huangtailed.com