Judgement and Prevention of Ginger blast in Shajiang

Because ginger blast and ginger Fusarium wilt are easy to be confused in appearance. Please distinguish according to the following methods, and then take corresponding prevention and control measures. The rhizome of ginger Fusarium wilt turned brown, while the initial stage of ginger blast showed translucent water immersion, yellowish brown and lost luster. Fusarium wilt of ginger exudates from the extrusion part, while ginger blast leaves only the outer skin due to the softening and decay of the internal tissue, so the extrusion part can flow out dirty white rice watery milk (white turbid) juice, giving off a bad smell. If it is determined that the diseased plant is ginger Fusarium wilt, 75% chlorothalonil wettable powder or 50% carbendazim wettable powder can be sprayed in time at the initial stage of the disease. 1200 times, spray once every 5-7 days, spray 3 times in a row, and use medicine alternately.

If it is judged to be ginger blast, the following comprehensive preventive measures are recommended:

The main results are as follows: (1) rotation or adjustment of product structure, because ginger blast pathogen generally lives in the soil for more than 2 years, especially in ginger planting areas, due to continuous cropping, a large number of ginger blast pathogens survive in the soil, even if healthy ginger seeds are implanted. It is also difficult to avoid diseases. Especially in the production areas of continuous farming, germs will also spread with Rain Water, or irrigation water sources. At present, there is no ideal fungicide to control ginger blast, and there is no ideal resistant variety. Therefore, it should be replanted at an interval of more than 3-4 years. Before replanting, consider planting food or vegetable crops. But be careful not to grow crops such as tomatoes, eggplant, chili peppers and potatoes, especially in plots where bacterial wilt has occurred.

(2) pay attention to soil disinfection before planting, apply and irrigate with 50-100 kg lime nitrogen and sufficient mature organic fertilizer 20-30 days before planting, then cover with plastic film for 15-20 days, and prepare for sowing. Generally speaking, the effect of soil disinfection is better than 20 ℃.

(3) strict selection of disease-free ginger, strict seed selection in disease-free ginger field, single storage in ginger storage room, and strict selection before planting in the next year.

(4) Jiang Tian should be selected in the land with high terrain and good drainage.

(5) the diseased plants should be eradicated in time, the healthy plants within 0.5 meters away should be removed, and the bacteria-carrying soil should be dug out, lime should be sprinkled in the disease hole, and then buried with clean aseptic soil.

(6) the mild disease should be sprayed with 95% thiophanate 1000 times or 30% Teflin 1000 times, or 50% carbendazim 1200 times, once every 7 days for 3 times, which is good for the control of the disease.