Causes and Control methods of Dioscorea opposita

Chinese yam, also known as Huaishan and sweet potato, is a kind of medicinal materials, which is often used to make medicinal meals, but the phenomenon of death occurs in the growth process of Chinese yam, which seriously affects the growth of Chinese yam and may lead to no harvest in serious cases. So what is the cause of the death of yam? How to prevent and cure it? Let's take a look at the detailed introduction.

First, the cause of the dead vine

In the process of yam planting, if the temperature drops, coupled with rainfall or in a hot and humid climate, the resistance of Chinese yam is weakened, and it is very vulnerable to bacteria, at this time, if the growth environment is improper or mismanaged, it will lead to the decline of yield and quality. At this time, the growth of Chinese yam is fragile, and if it is not managed properly, it is very likely to cause death. After the death of Chinese yam, the lack of leaf photosynthesis, reduced nutrition, underground tubers will stop growing, serious will lead to root death, great harm.

II. Prevention and control methods

1. put an end to the virus

In the selection of planting plots, it is necessary to choose each yam plot with an interval of more than three years, the former crops can plant rice, wheat, barley and other gramineous plants, but it is not suitable for rape and cabbage vegetables. There are few viruses in such fields, which makes the yam grow in a good environment. If there are conditions, it can be combined with land preparation for sun exposure and disinfection to reduce diseases and insect pests. When planting, we should choose Huang Liang, disease-free yam to do seed, after the incision to apply plant ash sterilization, only in this case, Chinese yam can grow healthily and avoid death.

2. Scientific management

Chinese yam likes dry environment and is afraid of waterlogging, so it is necessary to adopt the cultivation method of narrow box and deep trench during cultivation, and weed control in time after the previous harvest. In order to avoid the harm of weeds, herbicides are sprayed every half a month when the weather is fine after rain to stop the breeding of weeds. After the end of August, to clear the weather every half a month after rain is to spray fungicide anti-death vine, you can use mancozeb, methyl topiramate spray 3-4 times. In times of drought, furrow irrigation can be adopted to keep 80% of the surface moist, and pay attention to the fact that irrigation should not be carried out in the hot sun at noon, lest the yam can not stand hot and cold changes and cause physiological disorders to cause deciduous leaves and withered vines.

The above is the introduction of the causes and prevention and control methods of Chinese yam, hope to help you, want to know more related knowledge, please pay attention to us.