Pepper blight has become a devastating disease on spring greenhouse peppers. The disease is mainly caused by leaf rot in the open field, and the root rot is mainly used in the protected area. The pepper blight invaded the roots and necks in the protected area, and the diseased part was dark brown. Depression or atrophy, the lesion can cause root death and plant wilting.
In the shed, the pathogens are mainly spread by irrigation water, and the center of the disease is mostly formed in the low-lying water in the shed, the soil is sticky or the shed is leaking. The most important factor affecting the degree of disease is soil moisture. The higher the soil water content, the faster and heavier the disease is, especially the flooding of large water, the root of the pepper is immersed in the water, and it is easy to cause shed.
Advance prevention measures seedbed sterilization to prevent seedling disease. Before seedling, use 50% carbendazim 10g per square meter and mix 20kg of good seedbed soil, apply 2/3 of the soil to the seedbed, and use 1/3 for the seedling.
Cultivation and disease prevention, high ridge cultivation. The height of the ridge is 90 cm wide, the top is 50 cm, and the bottom of the ditch is 20 cm wide. The double rows are planted on the upper sides of the high ridge. Prevent excessive irrigation, prevent flooding of large water, and do not make the base of the plant contact with water, so as to keep the ground dry and see wet.
Chemical control First, before planting, use 25% of metalaxyl WP 0.5 kg per 667 square meters, and disinfect the soil with 70 kg of water. The second is to spray and irrigate the roots after planting. In the early stage, the stems and the surface of the plants should be sprayed before the onset to prevent the initial infection; in the middle and late growth stages, especially after the central disease plants are found in the field, the roots should be sprayed and irrigated in time to close the disease center, once a week, continuous prevention and control 2 ~3 times. The medicament can be used as a 50% creamer copper wettable powder 800 times solution or a 58% Raydormer wettable powder 500 times solution.
Author: Pan Jilan
Source: Farmers Daily
In the shed, the pathogens are mainly spread by irrigation water, and the center of the disease is mostly formed in the low-lying water in the shed, the soil is sticky or the shed is leaking. The most important factor affecting the degree of disease is soil moisture. The higher the soil water content, the faster and heavier the disease is, especially the flooding of large water, the root of the pepper is immersed in the water, and it is easy to cause shed.
Advance prevention measures seedbed sterilization to prevent seedling disease. Before seedling, use 50% carbendazim 10g per square meter and mix 20kg of good seedbed soil, apply 2/3 of the soil to the seedbed, and use 1/3 for the seedling.
Cultivation and disease prevention, high ridge cultivation. The height of the ridge is 90 cm wide, the top is 50 cm, and the bottom of the ditch is 20 cm wide. The double rows are planted on the upper sides of the high ridge. Prevent excessive irrigation, prevent flooding of large water, and do not make the base of the plant contact with water, so as to keep the ground dry and see wet.
Chemical control First, before planting, use 25% of metalaxyl WP 0.5 kg per 667 square meters, and disinfect the soil with 70 kg of water. The second is to spray and irrigate the roots after planting. In the early stage, the stems and the surface of the plants should be sprayed before the onset to prevent the initial infection; in the middle and late growth stages, especially after the central disease plants are found in the field, the roots should be sprayed and irrigated in time to close the disease center, once a week, continuous prevention and control 2 ~3 times. The medicament can be used as a 50% creamer copper wettable powder 800 times solution or a 58% Raydormer wettable powder 500 times solution.
Author: Pan Jilan
Source: Farmers Daily
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