Recently, the author visited farmers in Shandong Wulian, Liaocheng and other places and found that the root rot of cowpea planted in greenhouses was particularly serious. In individual greenhouses, cowpeas have even lost production. The disease is not only common in kidney beans, but also common in kidney beans (kidney beans), and the damage is particularly serious. The causes of the disease are: continuous cropping throughout the year, ignoring the treatment of the soil; partial application or over-application of nitrogen fertilizers, especially ignoring the application of microbial fertilizers; unscientific sowing methods; too high sowing density. The main measures to prevent cowpea root rot:
First, promote the use of crop rotation and microbial inoculation to prevent roots that have been grown for many years. It is best to use crops with cabbage or onions for more than two years. Without conditional rotation, after the cowpeas are unearthed, when the seedlings grow to 5-10 cm, the compound microbial fertilizer 3 kg per 100 mu is used to irrigate the roots per mu. The prevention effect is very satisfactory. Since most farmers use interplanting cowpeas, it is not convenient to use soil treatment agents in large areas in the soil. Therefore, it is recommended that everyone adopts the method of compounding microbial fertilizers to root and prevent them in advance. The compound microbial fertilizer jointly developed by the Soil and Fertilizer Research Institute of Shandong Academy of Agricultural Sciences and Shandong Shenglong Bio-engineering Co., Ltd. combines five functional bacteria together to improve soil, change crop growth environment, and promote crop root development. , so as to achieve the purpose of preventing the occurrence of cowpea root rot.
Second, change live seedlings for nutrition, transplanting through investigation and comparison, the incidence of root rot bean disease up to 75%, take mixed nutrient soil, the use of nutritious lotus seedlings, the method of transplanting cultivation of cowpea root rot significantly reduced . The specific approach is that farmers can make their own nutrient soil: mix 5 kg of “Golden Micro†microbial agent plus 1 kg of potassium sulfate compound fertilizer or diammonium as nutrient soil per 100 kg of dry fine soil. That is, the ratio of soil and fungus fertilizer is 100:5:1. After planting, use 100 times liquid compound microbial fertilizer to irrigate water. Before the planting, the microbial agent can also be used in the hole, 50 grams per hole or 10 grams of "Fugen".
Third, chemical control chemical control can be used bacteria g 400 times liquid irrigation roots, can also be used 20% collaborative ammonia bronze water agent 400 times sprayed stalk base or irrigation roots, irrigation once every 7-10 days, 3-4 times in a row, Irrigate each time each strain is about 200-250 ml.
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