Chinese yam often occurs Fusarium wilt in rainy season how to manage hemp yam in rainy season

After entering the rainy season, the management of Mashan medicine should do the following work:

Ma yam

1. Reasonable chemical control:

High temperature and humidity in the rainy season, coupled with topdressing, make the growth of Mashan medicine too prosperous, so it is necessary to control it before entering the rainy season, sooner rather than later. When Mashan vine climbs to 2 grams of 3 racks of noodles, it should start, spraying 50 grams of PBO + 10 grams of Ruipele per mu of yam, according to the growth of seedlings, spraying once every 15 days for 3 times in a row, so that the stems and leaves of Mashan are strong but not prosperous, and the control is up and down. The growth of the upper part and the lower part were balanced and a higher yield was obtained.

2. Improving soil to promote rooting:

The rhizome of Ma yam has strict requirements on the soil, it must be sandy loam, the soil should not be too heavy, and the land with continuous stubble or poor soil quality should be improved. 1 kg of ciba pine soil essence per mu of yam, mixed with 20 jin of fine soil or fine sand, should be scattered to the border to loosen the soil and promote the tuber root of Ma yam to be more smoothly in the process of rooting. increase the commodity of Ma yam and increase the yield at the same time.

3. Both medicine and fertilizer should be applied to control dead seedlings:

At the end of June, the root tuber of Chinese yam entered the expansion period, in which the demand for water and fertilizer was the greatest, but due to the rainy season, the problem of Fusarium wilt of Ma yam, that is, dead vine, was serious, so it was necessary to topdressing and preventing dead seedlings. Each mu of yam was applied with 200ml of Ruimiaoqing + 1.5 kg of partner, instead of topdressing at the same time of disease prevention. In previous years, the plots with serious Fusarium wilt were flushed and applied again at the end of July, which can effectively prevent the dead seedlings of Ma yam.

4. To control diseases and ensure high yield:

Ma yam enters the rainy season, the most serious underground disease is Fusarium wilt, that is, dead vine, typical stubble disease, the longer the number of years of stubble, the more serious the disease, once it occurs, there is no way, so it can only be prevented, one is to apply Ruimiaqing 200ml/ mu + 1.5kg partner, the other is particularly serious, focusing on spraying Ruiqing 8ml/ bucket water + Yiwei 20g / bucket water on the rhizome of Ma yam, which can reduce the occurrence of the disease.

5. Foliar fertilization is indispensable:

When Ma Yam enters the rainy season, foliar fertilization is essential. At the initial stage of root expansion, 20 g / mu of Ruipe calcium is sprayed to prevent root necrosis and bifurcation. In the middle stage of root expansion, Biou 30ml/ mu + Ciba potassium dihydrogen 50 g / mu was sprayed to increase yield and prevent premature senility.