Cabbage is the crop that most farmers grow a lot because it is in high demand in the market and is easy to sell. However, the arrival of the small full-fledged economy not only brought the excitement of the solar terms, but also brought the continuous high temperature weather. In order to make the cabbages live high, the vegetable farmers ensured the water in the growth process of the cabbage, and the frequency of watering the cabbage was greatly improved. At the same time, the evaporation of water caused by high temperature is also very fast, which greatly affects the nutrient absorption of cabbage, and this is also the period of high incidence of cabbage diseases and insect pests. Therefore, the management of pests and diseases has become the key to the harvest of cabbage. So what are the pests and diseases? How to prevent and cure? Let's take a look at the small series of Huinong.
1. Cabbage seedlings are sick. The collapse of cabbage seedlings is a common disease in the high temperature season in summer. Therefore, it is necessary to strictly control the humidity of the seedbed to prevent the spread of the disease. In the prevention and control, it is recommended to set the cabbage seedbed in a good plot to raise seedlings. In addition, the seeds should be soaked before the rapeseed is planted to kill the bacteria carried by the seeds. If the diseased plant is found, it must be removed in time.
2, soft rot. Soft rot usually occurs in the late growth stage of cabbage. Soft rot is very harmful to Chinese cabbage, and generally can directly lose about 40% of vegetable farmers, and soft rot has certain resistance to drugs, and drugs are difficult to control. Coupled with the high temperatures in the summer to spread it, it is very important to do a good job. The main measures for prevention and control include: selecting varieties with strong disease resistance; scientific fertilization and irrigation; killing chewing pests in time, cutting off the medium; and some drug control, such as allicin, chlorobromoisourea.
3, root swelling. The incidence of root disease in Chinese cabbage has become more and more serious in recent years, and it will directly affect the root development of Chinese cabbage. Therefore, it is extremely urgent to take preventive measures. It is suggested that the application of fluazinam, cyanosin, Bacillus subtilis or the like and non-cruciferous vegetable rotation before and after seeding can effectively prevent the occurrence of clubroot disease.
4, Liriomyza, aphids. The temperature of summer cabbage field is relatively high, suitable for the growth of pests such as Liriomyza sativae and aphids, which is harmful to Chinese cabbage, especially the leaves. Generally, some professional insecticides, such as avermectin and chlortetracycline, can be selected, but attention should be paid to rational use of drugs, and no drug residues should be caused, which affects the quality of Chinese cabbage.
In general, summer is an important period for the production of cabbage. Vegetable farmers must manage the field in order to ensure that the effects of pests and diseases under high temperature conditions threaten the growth of cabbage. Doing a good job of relevant prevention and control measures can effectively improve the survival rate of cabbage and increase production.
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