Prevention and treatment of bean rust
2020-10-03 12:18:51
1. Symptoms The disease affects the leaves, petioles, stems, and pods. Leaf damage is most common. A yellowish-white or pale spot appears on the leaves. Slightly uplifted and expanded to a tan-brown freckle (summer spores heap). After the epidermis ruptured, reddish-brown powder (having spores) was released, usually occurring on the back of the leaves. . At the late onset or on the leaves, black phospores grow apart, and the epidermis of the teliospore breaks up and gives off a dark brown powder (the teliospores). On the petioles and stems, the primary brown strips (swallow spores) are distributed, reddish-brown powder (hemospore) is released, and black or dark brown teliospores and teliospores are produced later. The lesions on the sputum were similar to those on the leaves, but the spores were larger.
2. Prevention and control methods (1) After harvesting, the remains left on the ground and buried in the soil will be conducive to the eradication of germs.
(2) Spraying medicine in time during onset. Commonly used fungicides and concentrations of 65% zein zinc WP 500 times; 70% rust WP 1000-1500 times. Spray once every 10 days, a total of 2-3 times.
2. Prevention and control methods (1) After harvesting, the remains left on the ground and buried in the soil will be conducive to the eradication of germs.
(2) Spraying medicine in time during onset. Commonly used fungicides and concentrations of 65% zein zinc WP 500 times; 70% rust WP 1000-1500 times. Spray once every 10 days, a total of 2-3 times.
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