The latest course on the prevention and control of banana leaf spot

Leaf spot disease is the most common in the process of banana planting, which will cause the leaves to dry up, make the leaves lose the original photosynthesis, reduce the quality and yield of bananas, seriously affect the economic benefits of fruit farmers, and do great harm. So how to effectively control banana leaf spot? Let's take a look at the detailed introduction.

1. Symptoms

The occurrence of leaf spot in banana is that the lower leaves bear the brunt of infection, and then the upper leaves will be infected. When the disease occurs, the leaves appear rice-grained or linear disease spots, the color is light yellow or brown, with the passage of time, the disease spots gradually expand into an oval or long shape, showing yellowish brown or dark brown, leaf spot disease will have a process of repeated infection, when there are more and more disease spots in leaves, there will be a large area of dry phenomenon, resulting in the leaves can not carry out photosynthesis, serious when the whole plant withered.

2. Occurrence regularity

Leaf spot disease is a fungal disease, which likes the environment of high temperature and humidity, especially in the rainy season, it is easy to induce the disease if it is drained and drained in time, and the disease will also be induced if the planting density is too high and the permeability between plants is poor; planting on land with poor drainage is also prone to this disease; too many leaf wounds will cause fungi to invade and infect the disease from the wound. With the partial application of nitrogen fertilizer, the absorption of other nutrients by plant roots is blocked, the nutrition is insufficient, the disease resistance is poor, and it is easy to be infected with this disease.

3. prevention and control measures

Comprehensive prevention and control should be adopted, first of all, the varieties with strong disease resistance should be selected and planted in a reasonable and close way. The planting density of different varieties is different, but in any case, the ventilation and light transmission in the orchard must be ensured. Clear the garden in time in winter and spring, clean up weeds, residual branches and leaves, trim diseased leaves and residual leaves, burn them centrally, and reduce pathogens. When fertilizing, it is necessary to maintain sufficient base fertilizer, reasonable master in the growing period, and increase the application of organic fertilizer, phosphorus and potassium fertilizer to improve the disease resistance of the plant. In the rainy season, timely drainage, reduce the humidity of the ground, when the disease can be prevented by difenoconazole spray, the effect is better.

The above is the introduction of banana leaf spot control technology, hope to help you, want to know more related knowledge, please pay attention to us.