What medicine is used for black rot of walnut?

The black rot of walnut was sprayed with Bordeaux solution 1: 200, 35% basic copper sulfate suspension 400 times, 35% basic copper sulfate (Ludabao fungicide) 300 times 400 times, DT fungicide 3000 times 4000 times, agricultural streptomycin sprayed for the first time in 100-120 months, and then sprayed once every 15 days for a total of 2-3 times.

What are the symptoms of walnut black rot?

Black rot of walnut is mainly harmful to fruit. When the fruit was infected in the early stage, brown dots appeared on the green skin, which gradually expanded to dark brown, and the flesh rotted. The pathogen can infect the part of the nut, and finally the whole fruit rotts, shrinks and falls off. Fruit infected in the later stage, the disease spot spread slowly, due to endocarp hardening, although the pulp rotted, but not rotten to the kernel, not easy to fall off, the loss is less. It can also infect twigs, young leaves and flowers, and the disease is prevalent in the rainy season.

Second, how to prevent walnut black rot?

1. Breeding resistant varieties is one of the important ways to control the disease, and disease resistance should be regarded as one of the important indexes in walnut selection.

two。 Strengthen cultivation management, cultivate strong seedlings and strong trees, prune reasonably, reduce microclimate humidity, remove diseased leaves, diseased fruits and diseased branches in time, and reduce field pathogens. 1000-1500 times liquid spray was used at the initial stage of the disease with 50% topazine wettable powder or 70% methyl topiramate wettable powder.

Summary: the above content is the introduction of walnut black rot sorted out by the editor of Tuliu.com, hoping to help farmers in need.