Analysis of the Causes of Yam Vine Death and the Latest Control Methods
Yam, also known as Chinese yam (Huai Shan) or earth potato, is a medicinal food ingredient often used to make medicinal dishes, but during the growth of yam, vine death can occur, seriously affecting yam growth and in severe cases even causing total crop failure. So what causes yam vine death? How should it be controlled? Let's take a look at the detailed introduction below.
I. Causes of Vine Death
During yam cultivation, if temperatures drop, combined with rainfall or in high-temperature and high-humidity weather, the resistance of yam weakens, making it highly susceptible to pathogen invasion. At this time, if the growing environment is unsuitable or management is improper, problems of reduced yield and quality will occur. At this point, yam is already growing weakly, and if management is improper, vine death is very likely to occur. After vine death, yam lacks leaf photosynthesis, nutrients decrease, underground tubers stop growing, and in severe cases the root system may die, causing great harm.
II. Control Methods
1. Eliminate Viruses
When selecting planting plots, choose plots where yam has not been planted for more than three years. The previous crop can be rice, wheat, barley and other gramineous plants, but vegetables such as rapeseed and cabbage are not suitable. Such fields have fewer viruses, allowing yam to grow in a good environment. If conditions permit, the plot can be sun-exposed and disinfected during land preparation to reduce pests and diseases. When planting, select bright yellow, disease-free yam as seed, and after cutting, apply plant ash to sterilize the cut surface. Only under these conditions can yam grow healthily and avoid vine death.
2. Scientific Management
Yam prefers a dry environment and fears waterlogging, so when cultivating, adopt the method of narrow beds and deep furrows. After the previous crop is harvested, weed in time. To avoid weed damage, spray herbicide once every half month on sunny days after rain to prevent weeds from growing. After the end of August, spray fungicide every half month on sunny days after rain to prevent vine death. Mancozeb and thiophanate-methyl can be sprayed 3-4 times. During drought, furrow irrigation can be used, keeping the bed surface 80% moist. Note that irrigation should not be carried out under the midday sun, so as not to cause physiological disorders in yam due to intolerance of cold-heat changes, leading to leaf drop and vine withering.
The above is an introduction to the causes of yam vine death and control methods. We hope it helps you. If you want to learn more related knowledge, please follow us.