What causes kidney bean deformity? What to do if kidney bean deformity occurs

When we plant kidney beans, if kidney beans are deformed, how to prevent and control them? Here are some specific methods:

One is that the drug that causes allergy to kidney beans was sprayed.

Kidney beans are sensitive to drugs containing mancozeb, mancozeb or ethoprocarb. Excessive application can easily cause the pods to bend. Kidney beans are very sensitive to alum, which can easily cause drug damage and pod deformity. Some kidney beans have also been damaged by spraying copper preparations or anthrax fomei. In mild cases, the pods are bent, and in severe cases, the leaves and pods fall off. When preventing and treating diseases such as gray mold and sclerotinia, the safer drugs used on kidney beans include fenpropimorph, chlorpyrifos, thiophanate-methyl, chlorpyrifos, chlorpyrifos, and carbendazim. When using copper preparations to prevent and treat bacterial diseases, the dosage should be halved. Drugs containing mancozeb, mancozeb or ethoprocarb should be used with caution or not at all to prevent drug damage, which can cause kidney bean deformity, affect yield and quality, and cause unnecessary losses.

The second is boron deficiency.

Kidney beans are not easy to set pods due to boron deficiency. Even if the pods are set, the flowers are large and the pods are long, the pods are bent, and the marketability is poor. The solution is to spray 1200 times of Solubor before the beans bloom.

Third, temperatures that are too high or too low can cause the pods to bend.

The most suitable temperature for kidney bean growth is 23~25℃ during the day and 18℃ at night. The best temperature during the flowering period is 23℃. If the temperature is lower than 20℃ or higher than 30℃ during the day, it will affect the setting of kidney beans. At noon during the flowering period, you must go to the greenhouse to observe the temperature and adjust the greenhouse temperature. In addition, in order to ensure that carbon dioxide enters the greenhouse early during the winter closed greenhouse period and photosynthesis proceeds early, in winter, one hour after the sun rises, open the vents as soon as possible when temperature conditions permit, increase the carbon dioxide concentration in the greenhouse, and maintain normal photosynthesis.

Fourth, adverse environmental impact.

If the greenhouse soil is too dry or has too much water, it is easy to cause the pods that have just been planted to appear "bent hooks" as described by vegetable farmers. This is because the soil is too dry or too wet, which will injure the root system, weaken the plant, and affect flowering and pod setting. To ensure that the pods are not bent, the root system must first be strong. Do not water before flowering. Watering should be based on soil moisture conditions, and fertilization should be combined with watering after pod setting. Watering should be done four times from transplanting to flowering, with small amounts of water, generally about 20 cubic meters per acre, and should not be flooded with water to avoid root rot and root injury.

Fifth, excessive use of growth inhibitors.

Vegetable farmers sprayed excessive inhibitors on kidney beans that grew too fast to flower, such as chlormequat and difenoconazole, which easily caused kidney beans to bend. When some vegetable farmers sprayed naphthaleneacetic acid to prevent pods from falling, the concentration was too high, causing the pods to bend, which should also attract our attention.

Sixth, the soil solution concentration is too high.

In view of this, less chemical fertilizers should be applied and more humic acid fertilizers should be applied. When the bean pods grow to 3-4 cm in length, 30-60 catties of humic acid fertilizers can be applied per mu of land to supplement nutrition. Avoid excessive application of chemical fertilizers, which will increase the concentration of soil solution and cause the pods to bend. It is best to use soilless cultivation when planting kidney beans in saline-alkali land to avoid direct contact between the kidney bean roots and the saline-alkali land, which will affect the root growth.