When the spring warms up, the growth and development speed of broad bean is obviously accelerated. However, when entering the flowering and pod-forming, the common broad-leaf broad bean has red spot disease, and at the same time, some rust and root rot occur. These diseases will lead to the reduction of the production of broad beans, the light production will be reduced by about 10%, the severe production will be reduced by 20%-30%, and the severe reduction of production will be more than 50%. It is a common hazard in the production of broad bean, and it must be paid attention to early. Prevent.

The red spot disease is caused by the red spot disease of the broad bean, and the rust is caused by the bean rust fungus, both of which are induced under the conditions of continuous rain and high humidity. Broad bean root rot is caused by the invasion of Fusarium. The primary source of infection is mainly the root of the disease or the residue of the diseased plant remaining in the field. The pathogen can survive for two years in the soil. When the soil temperature is between 10 ° C and 18 ° C, the field is dry or the drainage is poor, the disease is easily induced. Seeds can also be transmitted by bacteria.

In order to prevent and alleviate the damage caused by red bean spot, rust and root rot, in the agricultural measures, one must implement rotation, and the former should not choose the field where the legumes are planted; Drain the drainage channel, reduce the groundwater level, adjust the humidity in the field; Third, increase the application of phosphate fertilizer, potassium fertilizer, and enhance the self-resistance ability of broad bean; Fourth, remove the severely susceptible strain and bring it out of the field and burn it in time.

In chemical control measures, it is necessary to start spraying at the germination stage of the disease. For red spot disease, one can be sprayed with 1:1:100 times Bordeaux mixture; two can be sprayed with 65% dasen zinc 500 times solution or 25% carbendazim 750-1000 times solution. For rust, one can use 15% of 15% of rust, and 50kg of water; the other can be sprayed with 0.5 wave of sulphur. For root rot, one can be sprayed with 50% carbendazim WP 600 times solution, and the other can be sprayed with 10% thiophanate 500 times solution. (Farmers Daily)

This article URL: Common diseases and control methods of broad bean cultivation

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