After winter, the disease prevention and control of peas is mainly against powdery mildew, and if the prevention and control measures are not in place, it will cause severe loss.
The main cause of powdery mildew in peas is its leaves, vines and pods, mostly from leaves and leaves. In the initial stage, white powdery yellowish dots appeared, followed by enlargement of irregularly shaped pink spots, merging with each other. The diseased surface was covered with white powder and the back of the disease was brown or purple patches. The spread of the disease spread to the entire leaf, causing rapid yellowing of leaves. Infected stems and stems also showed small pink spots, which were full of stems and stems.
Control methods:
(1) Select resistant varieties according to local conditions.
(2) In the rotation system, the secretion of peas root pods has an impact on the root nodule activity and growth of root pods in the following year, so avoid continuous cropping.
(3) Grasping the cultivation and disease prevention measures centering on fertilizer and water, such as rational close planting, draining gutters, increasing phosphorus and potash fertilizers, and avoiding partial nitrogen fertilizer application.
(4) To seize the first incidence of pathogenic peas, or to spray more than 50% of sulfur in the initial stage of disease, 600 times of sulfur suspension; 15% of triadimefon WP 1500-2000 times; carbazole 2000 times. Every 10-15 days, continuous control 3-4 times.
The main cause of powdery mildew in peas is its leaves, vines and pods, mostly from leaves and leaves. In the initial stage, white powdery yellowish dots appeared, followed by enlargement of irregularly shaped pink spots, merging with each other. The diseased surface was covered with white powder and the back of the disease was brown or purple patches. The spread of the disease spread to the entire leaf, causing rapid yellowing of leaves. Infected stems and stems also showed small pink spots, which were full of stems and stems.
Control methods:
(1) Select resistant varieties according to local conditions.
(2) In the rotation system, the secretion of peas root pods has an impact on the root nodule activity and growth of root pods in the following year, so avoid continuous cropping.
(3) Grasping the cultivation and disease prevention measures centering on fertilizer and water, such as rational close planting, draining gutters, increasing phosphorus and potash fertilizers, and avoiding partial nitrogen fertilizer application.
(4) To seize the first incidence of pathogenic peas, or to spray more than 50% of sulfur in the initial stage of disease, 600 times of sulfur suspension; 15% of triadimefon WP 1500-2000 times; carbazole 2000 times. Every 10-15 days, continuous control 3-4 times.
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