MySheen

Soybean anthracnose

Published: 2024-12-23 Author: mysheen
Last Updated: 2024/12/23, Symptoms: it can occur from seedling stage to mature stage. It is mainly harmful to stems and pods, but also to leaves or petioles. The stem is infected with primary brown spots, which are covered with irregularly arranged black dots. The small black spots infected with pods were arranged in a wheel, and the diseased pods could not develop normally. In the seedling stage, Ziji infection showed black-brown disease spot, the edge was slightly shallow, and the disease spot often appeared cracking or depression after expansion; the disease spot could spread from cotyledons to young stems, and withered above the pathogenic part. The infected margin of the leaf is dark brown, and the inside is light brown. Petiole infected spot brown, irregular. Prevention and cure method

Symptoms: From seedling to maturity can be affected. It mainly damages stems and pods, but also leaves or petioles. The stem is infected with primary brown spots, which are densely covered with black dots arranged irregularly. The infected pods are arranged in a circular pattern with small black spots, and the infected pods cannot develop normally. The seedling stage Ziji disease is black brown disease spot, the edge is slightly shallow, the disease spot often appears cracking or depression after expansion; the disease spot can extend from the cotyledon to the young stem, and the diseased part is dead. The infected leaf margins are dark brown and the interior is light brown. Petiole infected spots brown, irregular.

Control methods: (1) Select disease-resistant varieties and disease-free seeds. (2)After harvest, the sick and disabled bodies should be removed in time, deep ploughing should be carried out, and rotation should be carried out for more than 3 years. (3)medicament

Control: seed dressing with 50% carbendazim WP or 50% iprohydantoin WP 0.5% of seed weight before sowing, stirring and suffocating for several hours. After flowering, spray 500 times solution of 25% Tanteling WP or 600 times solution of 47% Garinon WP.

 
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