What kind of medicine is used for cotton verticillium wilt

The damage of cotton Verticillium wilt to cotton planting is devastating and spreads rapidly, but it is difficult to eradicate. What kind of medicine is better for cotton verticillium wilt?

What medicine is used for cotton wilt and Verticillium wilt

The main results are as follows: 1. The peak period of Fusarium wilt is before and after the budding of cotton, and the Fusarium wilt comes violently and seriously in mid-June. In case of heavy rainfall, it can be beneficial to the large-scale epidemic of Fusarium wilt. It can be sprayed with WP1500-2000 times liquid in the first and middle of June, and sprayed 1-2 times every 7-10 days, which can effectively control the epidemic of cotton Fusarium wilt.

2. The peak period of Verticillium wilt is in the cotton flower and boll stage in July and August, when the cotton plant becomes sick, causing few bolls, shedding more, the yield is reduced, and the quality is deteriorated, and because the cotton plant is large and difficult to control, we should pay close attention to the control in the middle and late July. The occurrence of Verticillium wilt can be effectively prevented by spraying with WP1000-1500 times solution of 25% bromofumonil and spraying again at intervals of 7-10 days.

3. 30% azoxystrobin 800x, 12.5% Zhiweiling 200,250x, 30% carbendazim 600x were infused once at the initial and peak stages of the disease, each plant was infused 50-100ml, and the control effect was 80% 90%.

2. Incidence regularity of cotton wilt and Verticillium wilt.

Cotton Verticillium wilt spread mainly through infected cottonseed, cottonseed hull, cottonseed cake, soil, diseased plant residues, fertilizer, running water and farmland management tools.

When the pathogen of cotton wilt and Verticillium wilt in soil encountered suitable temperature and humidity, the spore or microsclerotia sprouted mycelium, invaded from the root hair or wound of cotton root, passed through the epidermal cell, grew in the subcutaneous tissue, entered the vessel of xylem, propagated in the vessel, and produced a large number of microspores, which were transported to all parts of the plant with plant nutrients.

Due to the mass reproduction of hyphae and spores and the stimulation of adjacent parenchyma cells to produce gelatinous substances and other clogged ducts, the pathogen can also produce toxins that wilt and wither the plants.

When the soil temperature was low and the humidity was high, the mycelium grew rapidly, and the first disease peak appeared in the middle and late June in the field.

When the summer temperature is high, the development is slow. It is rainy in autumn and the second peak occurs when the temperature drops.

The optimum temperature for the onset of Verticillium wilt was 25-28 ℃. The onset of Verticillium wilt was slow beyond this temperature, and the symptoms were hidden when it reached 35 ℃. The peak of the disease was in the flowering and boll stage of cotton from July to August in the north.

There are more than 40 species of hosts and hosts of Fusarium wilt of cotton, half of which are wild plants and 660 species of Verticillium wilt of cotton. The two pathogens do not harm crops such as wheat, corn, rice, sorghum, millet and millet.

For the prevention and control of cotton wilt and Verticillium wilt, disease-resistant varieties should be selected and seeds should be treated with medicine. at the same time, good field management and reasonable crop rotation should be done.