Hello, can spraying mancozeb prevent and control turmeric leaves?

Turmeric leaves should be selected for pesticide prevention and control at the same time, and the specific methods are as follows:

First of all, remove the film in time to prevent physiological yellow leaves caused by high temperature. At present, the outside temperature is high, although the ginger planted in the small arch shed has taken the practice of perforating and aeration to cool down, but, in the case of no film removal, the temperature in the arch shed is very high, and the high ground temperature affects the expansion of ginger blocks, and also affects the root's rooting and absorption, resulting in leaf yellowing, therefore, remind ginger farmers to withdraw the film in time, but the film should be removed in the afternoon on a cloudy day as much as possible to avoid infection due to drastic changes in environmental conditions.

Secondly, it is necessary to prevent the occurrence of bacterial diseases as soon as possible after the film is removed. After the film is removed, ginger grows in the open field, which is greatly affected by the weather, and after entering July, there is more rain, and in the case of high humidity, ginger is easy to be infected with bacterial diseases, resulting in the phenomenon of yellowing of leaves. Therefore, it is important to prevent it early.

For the plots that have not been removed, S-induce can be used to improve the disease resistance of the plants before the film is removed, and attention should also be paid to the application of streptomycin and 800 times of Zhongshengmycin or 1000 times of quinolone to prevent bacterial diseases of ginger.

In addition, care should be taken to prevent large turmeric leaves caused by leaf blight. The disease occurs seriously in the summer when the temperature is high and rainy, or when the dew is heavy during the high temperature season. Therefore, it is necessary to do a good job of cooling, and in the case of a large temperature difference after a rainy day, there is more condensation at night, so it is necessary to spray in time.

It can be treated with 10% difenoconazole 1500 times and 50% carbendazim 400 times.

Hello, you can also spray, but also scientifically manage and fertilize.

Ginger leaves turn yellow, and some stem rot is ginger rot disease.

This disease mainly occurs in the underground rhizome part, mostly in the base of the stem near the ground and the upper half of the rhizome, the initial is water-stained, yellow-brown, gradually softened and rotted, only the outer skin remains, the inside of the victim ginger is gray-white, and there is foul-smelling juice. The leaves of the diseased plant are yellow-brown, and the leaves are withered and drooping, causing the diseased leaves to fall early. In areas with severe disease, no ginger is produced, and all ginger can be rotted.

Basis and method of prevention and control.

The fungus overwinters in the soil and rhizomes, and can survive in the soil for more than 2 years. Mycozymatic rhizomes are the main source of primary infection and also cause long-distance transmission.

First of all, it is necessary to choose a disease-free ginger.

Before planting, the cut ginger should be soaked in 1:1:100 Bordeaux solution for 20 minutes, or the ginger wound should be sealed with plant ash to avoid the invasion of germs from the wound.

Severely diseased plots, for 2-3 years of crop rotation.

Pathogens are conducive to growth and development when the soil temperature is high and the humidity is high. It spreads through running water, underground pests, etc. Therefore, it is necessary to strengthen field management, prevent and control underground pests, prepare the land flat, pay attention to field drainage, and not accumulate water. Apply more basal fertilizer, especially plant ash.

Prevent the irrigation water from diseased fields from flowing into disease-free fields and avoid the spread of pathogens through running water.

If diseased plants and ginger are found, they should be pulled out immediately, and lime should be sprinkled on the diseased hole and its surroundings for disinfection, and the diseased plants and ginger should be treated centrally, not composted.

In the early stage of the disease, you can choose to use streptomycin sulfate or agricultural streptomycin 4000 5000 times solution, or 1:2:300 400 Bordeaux solution, spray once every 7 10 days, and continue to control 2 3 times.

If the leaves turn yellow, it is not possible to prevent the intensity of spraying, so spray carbendazim and some fertilizer compound fertilizers.

The yellowing of the leaves of ginger can be prevented by spraying Daisen zinc.