Since the beginning of spring, southern rape has entered a period of prosperous growth. This period is the period when rape has the largest amount of fat and most diseases and insect pests occur. With the continuous rise of temperature in the later period, the occurrence of pests and diseases such as sclerotium, downy mildew and aphids will become increasingly serious. According to meteorological forecast, most of the southern part of the country will maintain rainy weather in the next few days, and the temperature will decrease, causing various degrees of frost damage and waterlogging to rape. Therefore, it is imperative to strengthen field training and focus on control of Sclerotinia, downy mildew and aphids.
First of all, persistent rainy weather can easily lead to anaerobic rot and lodging of oilseed rape. We must seize the intermittent period of low temperature and rainy weather, clear up the three trenches in the field, eliminate water accumulation, and mitigate the effects of freezing damage and waterlogging. The frozen leaves of frozen and frostbite were promptly removed from the early-frozen, early-flowering rapeseeds and sunny days to promote branching growth. After picking lotus root, 3-4 kg of urea per acre can promote plant growth.
The first flowering period and full flowering period each spray a fertilizer, can prevent the pests from increasing production. Rapeseed during spring flowering season will increase sclerotial sclerotia. It must be sprayed with pesticide and fertilizer mixture at the early flowering stage to promote the growth and development of rape, prevent flowering, prevent sclerotium, prevent downy mildew, and prevent Premature aging. When the rate of diseased leaf disease infected with Sclerotinia reached 10% or more and the rate of diseased stems reached 1%, the drug was started. Per acre with 25% amidiamine 50ml or 40% sclerotin net wettable powder 100-150g and 75% chlorothalonil WP 100g, 50% pymenone wp 10g and 30g boron fertilizer ( About 20% of the available boron content), 60 grams of potassium dihydrogen phosphate, 500 grams of urea, 25-30 kg of water evenly sprayed. Rapeseed full bloom, the final flowering time in a timely manner to remove the plant's lower old, yellow, diseased leaves, bring out the field manure, can directly reduce the pest damage, improve the lower part of the plant ventilation and light transmission, reduce pest re-infection source. At the same time, 43% tebuconazole SC 30 ml per acre plus 50% pymetrozine wp 15 g water 45 kg spray control sclerotinia and aphids.
Other Drugs,Sodium Bicarbonate Injection,Sodium Bicarbonate,Sodium Bicarbonate Solution
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