Spring rape sclerotinia disease measures
2019-06-08 08:03:40
Sclerotinia disease is susceptible to spring rape disease, and it mainly damages stems of rapeseed and causes plants to wither early, which has great influence on yield and quality. Spring is a critical period for the prevention and treatment of Sclerotinia sclerotiorum, and the following measures should be taken care of:
1. Clearance and waterlogging prevention in spring and rainy areas, easy water accumulation in the field, causing damage to roots, affecting absorption and impeding plant growth and development, so that the resistance to disease decreased; In addition, field high humidity is conducive to the infection and spread of bacteria. Therefore, in the spring, we must do a good job in the trench cleaning work in the rape fields. Make the ditch unimpeded and ensure rain and dry ground.
2. The pathogens of the old yellow leaf rape sclerotium sclerotiorum were poor in the ability to infect the robust green leaves. Initially, the disease mainly affected the infection of the lower yellow leaves. The culm was caused by the diseased leaves on the stems. The timely removal of the old yellow leaves from the lower part of the plant can reduce the source of the disease and improve the ventilation and light transmission conditions in the field, which will help prevent disease. Old yellow leaves are generally grown when the old yellow leaves of late rape blossoms increase. Remove 2 to 3 leaves below the main stem branch, and use the field where it grows too busy to play early and hit 1 to 2 leaves. Unpickable old yellow leaves can not be pulled down to try to reduce the injured area, and choose to carry out in the sunny afternoon, in order to facilitate wound healing. The old yellow leaves taken off should be taken out of the fields or burned.
3. Chemical control agents The main targets of the control of pesticides are continuous cropping plots, low-level waterlogged plots, and over-exploited nitrogen fertilizers, which are generally spray-protected during rainy seasons. Rapeseed flowering period is a critical period for the control of Sclerotinia sclerotiorum, and it is usually sprayed once at full flowering stage, and then sprayed once at the final flowering stage depending on the disease progression. To catch the clear spray. Pharmacy selection: Each time, the use of 40% WPZ wettable powder 75-100g, or 50% fasting wettable powder 50-75g, or 40% chlorhexidine suspension 150-200g, or 50% carbendazim WP 100 ~ 150 grams, add 50 ~ 75 kg of water diluted, evenly sprayed on the lower stems and leaves of the plant. In addition, the use of 7.5 kg of quick lime and 22.5 kg of ash in the flowering period to mix and spread is also effective.
1. Clearance and waterlogging prevention in spring and rainy areas, easy water accumulation in the field, causing damage to roots, affecting absorption and impeding plant growth and development, so that the resistance to disease decreased; In addition, field high humidity is conducive to the infection and spread of bacteria. Therefore, in the spring, we must do a good job in the trench cleaning work in the rape fields. Make the ditch unimpeded and ensure rain and dry ground.
2. The pathogens of the old yellow leaf rape sclerotium sclerotiorum were poor in the ability to infect the robust green leaves. Initially, the disease mainly affected the infection of the lower yellow leaves. The culm was caused by the diseased leaves on the stems. The timely removal of the old yellow leaves from the lower part of the plant can reduce the source of the disease and improve the ventilation and light transmission conditions in the field, which will help prevent disease. Old yellow leaves are generally grown when the old yellow leaves of late rape blossoms increase. Remove 2 to 3 leaves below the main stem branch, and use the field where it grows too busy to play early and hit 1 to 2 leaves. Unpickable old yellow leaves can not be pulled down to try to reduce the injured area, and choose to carry out in the sunny afternoon, in order to facilitate wound healing. The old yellow leaves taken off should be taken out of the fields or burned.
3. Chemical control agents The main targets of the control of pesticides are continuous cropping plots, low-level waterlogged plots, and over-exploited nitrogen fertilizers, which are generally spray-protected during rainy seasons. Rapeseed flowering period is a critical period for the control of Sclerotinia sclerotiorum, and it is usually sprayed once at full flowering stage, and then sprayed once at the final flowering stage depending on the disease progression. To catch the clear spray. Pharmacy selection: Each time, the use of 40% WPZ wettable powder 75-100g, or 50% fasting wettable powder 50-75g, or 40% chlorhexidine suspension 150-200g, or 50% carbendazim WP 100 ~ 150 grams, add 50 ~ 75 kg of water diluted, evenly sprayed on the lower stems and leaves of the plant. In addition, the use of 7.5 kg of quick lime and 22.5 kg of ash in the flowering period to mix and spread is also effective.
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