How to prevent and control banana leaf spot disease? Latest prevention and control techniques and methods tutorial
In the process of banana cultivation, the most common disease is leaf spot disease. It causes leaves to dry up, making the leaves lose their original photosynthesis, causing the quality and yield of bananas to decline, seriously affecting the economic income of fruit farmers, with huge harm. So how can banana leaf spot disease be effectively prevented and controlled? Let's take a look at the detailed introduction.
1. Disease symptoms
When banana leaf spot disease occurs, the lower leaves are the first to be infected, and immediately afterward the upper leaves are also infected. When the disease occurs, rice-grain-shaped or line-shaped disease spots appear on the leaves, pale yellow or brown in color. As time goes on, the disease spots gradually expand into oval or elongated shapes, yellow-brown or dark brown. Leaf spot disease has a process of repeated infection. When there are more and more disease spots on the leaves, large-area drying will occur, causing the leaves to be unable to carry out photosynthesis, and in severe cases the entire plant dies.
2. Occurrence pattern
Leaf spot disease is a fungal disease. It prefers high-temperature and high-humidity environments, especially during the rainy season. If humidity is not reduced and drainage is not carried out in time, it is extremely easy to induce this disease. In addition, excessive planting density and poor permeability between plants will also induce this disease; planting on plots with poor drainage is also prone to this disease; too many wounds on the leaves will cause fungi to invade through the wounds and infect the plant with this disease; excessive application of nitrogen fertilizer obstructs the root system's absorption of other nutrients, resulting in insufficient nutrition, poor disease resistance, and susceptibility to this disease.
3. Prevention and control measures
Comprehensive prevention and control should be adopted, with prevention as the main approach and control as the supplement. First, choose varieties with strong disease resistance. When planting, plant at a reasonable density. Different varieties have different planting densities, but no matter what, good ventilation and light transmission in the orchard must be ensured. In winter and spring, clean the orchard in time, clear weeds, residual branches and fallen leaves, and at the same time prune diseased leaves and residual leaves, and burn them in a centralized manner to reduce pathogens. When fertilizing, maintain sufficient base fertilizer, fertilize reasonably during the growth period, and increase the application of organic fertilizer and phosphorus and potassium fertilizer to improve the disease resistance of the plants. During the rainy season, drain water in time to reduce ground humidity. When the disease occurs, difenoconazole can be sprayed for control, with good results.
The above is an introduction to the prevention and control techniques for banana leaf spot disease. I hope it can help you. If you want to learn more related knowledge, please stay tuned to us.