MySheen

Cotton boll red rot of cotton

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, Symptoms of cotton boll infected with the initial amorphous disease spot, in wet weather or continuous rain, the disease spread rapidly, throughout the whole boll, some spread to the cotton fiber, producing a uniform pink or light red mildew layer, easy to stick together after rain, become a pink lump, resulting in the disease boll can not crack, cotton fiber rot into a rigid petal, seed infection, the germination rate decreased. The pathogen is the same as cotton seedling red rot. The route of transmission and the conditions of the disease are weak parasitic bacteria, which can not directly infect cotton bolls, but mainly cause the disease from the wound.

Symptoms Cotton bolls infected after the initial amorphous spots, wet weather or continuous rain when the disease spread rapidly, throughout the whole boll, some spread to the cotton fiber, resulting in uniform pink or light red mold layer, easy to adhere together after the rain, into pink blocks, resulting in disease bolls can not crack, cotton fiber rot into stiff petal-like, seed infected, germination rate decreased.

The pathogen is the same as cotton seedling red rot.

Pathway of transmission and condition of disease The fungus belongs to weak parasite, it can't infect cotton bolls directly, it mainly causes disease from wound invasion, the disease spots caused by cotton boll angle spot, boll blight, boll anthracnose, etc. can induce red rot, and a large number of conidia are produced on the diseased bolls, which are transmitted by wind and rain and reinfected many times.

Control methods refer to cotton seedling red rot.

 
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