Bacterial black spot of mango mostly occurs in rainy days. How to prevent and reduce losses scientifically and effectively?

1, variety selection: if fruit trees are disease-resistant, seed selection is a key step in planting. Varieties should be selected according to local planting conditions, especially in coastal areas, where typhoons patronize every year, causing great losses to many fruit trees. Therefore, we must choose mango varieties with strong weather resistance and disease resistance for planting.

2, completes the weatherproof measures:

Protective measures should be taken to plant mango trees in coastal areas and relatively flat places. For example, trees taller than mango trees are planted outside mango orchards as natural barriers, or mango trees are planted in forests with large forests to create natural protective belts. After the rain, we should strengthen the drainage of ridges and ditches, and don't let the rain accumulate at the roots of fruit trees all the time, so as not to hurt the trees.

3, do a good job in quarantine:

Before seedling raising, the seeds can be quarantined to ensure that there is no disease before seedling raising. When raising seedlings, don't put the seeds directly in the orchard to raise seedlings. You can separate the seedlings from the planted orchard. Make sure there are no problems before taking the seedlings to the orchard for planting.

4, do a good job of cleaning up the orchard:

In order to prevent germs from hiding in diseased branches, residual branches, dead branches, rotten leaves, rotten flowers and rotten fruits, the orchard should be inspected and cleaned regularly at ordinary times. Prune branches that grow too densely to maintain the permeability of fruit trees and enhance photosynthesis. For too dense inflorescences and fruits, flowers and fruits should be thinned. Pruning and thinning flowers and fruits should be carried out in sunny days, which can speed up wound healing and reduce the invasion of pests and diseases.

(2) Chemical control:

Chemical control is to spray pesticides on fruit trees in a specific period of time, especially after pruning, thinning flowers and fruits, it is easy to get infected with germs. Preventive measures should be taken in advance according to the weather forecast, and drugs should be sprayed before and after typhoons and rainstorms. The reference drugs sprayed are as follows:

500-fold solution of 2% kasugamycin, 600-fold solution of 77% chlorhexidine wettable powder, 500-fold solution of 40% copper hydroxide suspension, 700-fold solution of 20% copper clothianidin, copper quinoline and zhongshengmycin. There are many chemicals that can be used and can be controlled according to local conditions.

In the prevention and control of bacterial black spot of mango, agricultural control is the main one, supplemented by chemical control. At ordinary times, we should do a good job in the management of fruit trees, do not provide suitable opportunities for diseases, and avoid the outbreak of diseases and bring economic losses.

The damage range of mango bacterial black spot disease is still relatively wide, including leaves, fruits, tender parts, branches, petioles, fruit stalks, flower buds, etc., so it is best to prevent it before the onset, and it will be more troublesome to prevent it after the onset, and the effect will be greatly reduced. Therefore, adopting scientific control methods and measures can avoid unnecessary losses, increase mango yield and improve mango quality.