With the New Year's Day approaching, many sheds will soon face a change of enthusiasm. The renewal of the sheds will begin earlier in December, and the renewal of sheds will begin later in January. Winter is the period when the price of vegetables is the highest, and the time spent on changing crops is heavy. However, vegetable farmers cannot cope with it. Otherwise, it is easy to leave hidden dangers and cause various problems. Here, the author will make the following adjustments to the problems that often occur in the past, hoping to arouse the attention of vegetable farmers and avoid the appearance of similar problems again.
Vegetable residues have not been cleaned
When many farmers clean up their greenhouses, some residual leaves and a large number of root systems are left in the soil. Especially when removing melon vegetables, many vegetable farmers directly cut off the roots and leave the root system completely in the soil. If the vegetable garden is not thoroughly rooted, it will leave a large number of pathogens, pests, etc., leaving a source for the spread of future diseases. This is not an alarmist, especially when many greenhouse vegetable plants suffer from root diseases such as blight, root rot, and root knot nematodes. If the roots are not pulled out completely, the pathogens will remain in the soil and continue to harm the squat vegetables. . When vegetables are pulled out, it is an opportune time to reduce the number of pathogens such as root-knot nematodes. This opportunity can be used to completely bring root knot nematodes attached to roots. If the soil is relatively dry at the time of pulling out the garden, you can pour in small water before the garden is pulled out to moisten the soil. If necessary, you can use iron shovels to remove the roots so that they do not have to be left in the soil. Especially in the autumn and early spring when cultivating the same variety of vegetables, it is necessary to pay special attention to clean up the vegetable residues in the clean shed so as to avoid leaving more toxic substances and pathogens, and increase the incidence of diseases and insect pests of the squat vegetables.
Shed weeds and perennial vegetables are not cleaned
In winter, vegetables are changed, and most vegetable farmers clean up the plants. If there are no plant residues and weeds, they will immediately turn to the ground and set aside. Many vegetable farmers also plant vegetables such as leeks and garlic sprouts in the greenhouse. Perennial weeds and vegetables are the main source of viral disease transmission, especially the perennial fibrous root crops such as leeks. Although they do not show symptoms when infected with viruses, they are toxic in the body and can easily become the source of viral disease transmission. In general, greenhouse vegetable virus disease is high in the vents, where the humidity is low, the pests are easy to gather and pass the virus, and therefore is the place where the virus disease occurs most. The shed is planted with greenhouses such as leeks and vegetables. Viral disease starts from the front of the shed, and the incidence of ventilator infection is minimal. In recent years, there has been a serious outbreak of viral diseases in vegetables in front of greenhouses, and these perennial vegetables and weeds are the “culprits.â€
In addition, the vegetables and weeds on the front face of the greenhouse left a shelter for pests such as hummocks, leafhoppers and whiteflies, greatly increasing the number of pests, cleaning up unclean weeds and vegetables, and also early spring pests in recent years. The important reason for high rates.
It is advisable for vegetable growers to clean the front face of the greenhouse before removing all the perennial crops such as leeks and garlic, and then cover the black mulch to prevent the weeds from growing again. If you want to grow some vegetables for your own use, you should choose one year old, seed-producing, vegetables that are not easy to bring viruses, such as cabbage, lettuce, and peppers. The perennial vegetables such as leeks, potatoes, garlic, etc., mostly carry viruses, and should not be planted in front of greenhouses. The cultivation of virus-free potatoes, leeks, and other vegetables is more prosperous and the yield is higher. The most critical point is that the seedlings do not carry viruses.
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