Causes and prevention of crooked kidney bean deformity in greenhouse

Kidney beans planted in the greenhouse have abnormal pods, and most of them show "curved hooks". After analysis, there are the following reasons:

Kidney bean

One is to spray drugs that are sensitive to kidney beans. Kidney beans are sensitive to drugs containing mancozeb, mancozeb or acetamivir, such as excessive application, which can easily bend the pods. Kidney beans are very sensitive to poisonous alum and are prone to drug damage, resulting in pod deformities. There are also kidney beans due to spraying copper preparation or anthrax Fumei appeared drug damage, light pods bent, heavy leaves and pods. In the control of Botrytis cinerea, Sclerotinia sclerotiorum and other diseases, the safer drugs used on kidney beans are Prodnisolone, Sukeling, Chlorothalonil, Nongliling, Baikodi and carbendazim. When using copper preparation to control bacterial diseases, the dosage should be halved. Drugs containing mancozeb, mancozeb or aldicarb should be used with caution or not, so as to prevent drug damage, cause kidney bean deformity, affect yield and quality, and cause unnecessary losses.

The second is boron deficiency. Kidney bean lack of boron is not easy to set pods, even if the pods sit, but the flower pods are long, the pods are curved, and the merchandise is poor. The solution is to spray 1200 times the boron in front of the Yun Dou flower.

Third, too high or too low temperature will cause pods to bend. The most suitable temperature for kidney bean growth is 23-25 ℃ in daytime, 18 ℃ at night, and the best temperature in flowering stage is 23 ℃. Kidney bean pod setting will be affected if it is lower than 20 ℃ or higher than 30 ℃ in daytime. When flowering at noon, you must observe the temperature in the shed and regulate the temperature in the shed. In addition, in order to ensure that carbon dioxide enters the greenhouse early during the closed greenhouse in winter, photosynthesis is carried out early, in winter, one hour after the sun rises, the vents are opened as soon as the temperature conditions permit, so as to increase the concentration of carbon dioxide in the greenhouse and maintain the normal photosynthesis.

Fourth, the adverse environmental impact. Too dry soil or too much water in the greenhouse can easily cause what vegetable farmers call "hooks" in the pods that have just sat. This is because too dry or too wet soil can damage the roots, leading to plant weakness and affecting flowering and pod setting. To ensure that the pod does not bend, the root system must first grow healthily. Don't water before the flowers. Watering should be determined according to soil moisture, and fertilizing should be combined with watering after sitting pods. Before transplanting to flowering, water should be watered four times and small water should be watered. Generally, about 20 square meters of land should be watered per mu, instead of flooding to avoid root injury.

Fifth, overuse of growth inhibitors. Vegetable farmers sprayed excessive inhibitors on kidney beans, such as dwarf, difenoconazole and other pesticides, which are easy to cause kidney beans to bend. When some vegetable farmers spray naphthalene acetic acid to prevent pods from falling, the pods are bent due to excessive concentration, which should also attract our attention.

Sixth, the concentration of soil solution is too high, too much chemical fertilizer or saline-alkali soil will also cause pod deformities. In view of this, we should apply less chemical fertilizer and more humic acid fertilizer. When the pod grows to 3-4 cm long, 30-60 jin of humic acid fertilizer can be applied per mu to supplement nutrition. Excessive application of chemical fertilizer should not increase the concentration of soil solution and cause the pod to bend. Soilless cultivation is the best way to grow kidney bean in saline-alkali soil, so as to avoid direct contact between kidney bean root system and saline-alkali soil and affect root growth.