After Tianma matured, it was completely rotten.
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A letter from Li Zongguo, a peasant from Jiaheshan Village, Jiahe Township, Qianxi County, wrote: I started to learn Tianma last year. According to the relevant introduction, I planted 50 or 60 square meters indoors and the harvest was good last year. This year I began to expand planting, or follow the method of last year. In September of this year, I began to dig and sold in the market for only three days. Then I went to dig again and found that Gastrodia was burned out. This is how it happened? Provincial Plant Defence Station Pest Control Division Zhang Qiudong A: Most of its causes are due to bad environment, such as high temperature, high humidity, poor ventilation and other factors harmful to the growth of Gastrodia, resulting in Gastrodia tuber chlorosis, the Central Organization Decayed, the interior becomes a slurry, eventually dying as a result of rot. Control methods: First of all, strict selection of Gastrodia species. It is best to use a cross-breeding breed of zero- or one-generation hybrids. If it is found that the hemp body is not full, the growth point is not obvious, and there are signs of decay (even if it is a small point), they should be discarded. Followed by the need to pay attention to indoor cleanliness, do a good job of environmental health, often ventilated and breathable. Pay attention to pest control. Common pests are cockroaches, cockroaches and white ants. Control methods: First, manual killing. Once the surface soil or sand of the cultivation site is found to be uplifted, the soil or sand can be excreted manually for killing. The second is light trapping. With the help of the characteristics of phototaxis for most insects, black light lamps are set up in Tianma cultivation sites for adult trapping. The third is drug trapping. The mirex or anti-pollution powder can be placed at the site of the cultivation site.