MySheen

Polygonatum leaf spot

Published: 2024-11-10 Author: mysheen
Last Updated: 2024/11/10, The disease began from April to May, and the damaged leaves first appeared oval or irregular shape from the leaf tip, brown on the outer edge and light white in the middle, which spread downward from the disease spot, causing the leaves to scorch and die. The disease is more serious in the rainy season. Control methods: clean the fields after ① harvest, burn the remains of withered branches and eliminate the pathogen of overwintering. Before and at the initial stage of the onset of ②, the patients were sprayed with 100 times Bordeaux solution or 1000 times of 50% acetaminophen, once every 7 days and 4 times in succession.

The disease began from April to May, and the damaged leaves first appeared oval or irregular shape from the leaf tip, brown on the outer edge and light white in the middle, which spread downward from the disease spot, causing the leaves to scorch and die. The disease is more serious in the rainy season.

Prevention and control methods:

After harvest, ① cleaned the fields, burned the remains of withered branches, and eliminated the pathogen of overwintering.

Before and at the initial stage of the onset of ②, the patients were sprayed with 100 times Bordeaux solution or 1000 times of 50% acetaminophen, once every 7 days and 4 times in succession.

 
0