The damage and integrated control of watermelon leaf blight
Watermelon leaf blight mainly damages the leaves of watermelon. Cotyledons were mostly infected at the beginning of the leaf margin, and then became light brown to brown. Round or semicircular lesions extend to the entire cotyledons and dry out. Germs can be affected at temperatures of 10-36°C and relative humidity higher than 80%. Rainy weather and relative humidity higher than 90% are more prevalent or occur. Late watermelon growth watermelon enlargement period, can make a large area of ​​melon field leaves dead, seriously affecting yield. Spray 75% chlorothalonil wettable powder 500 to 600 times liquid and 50% acetaminophen wettable powder 1000 times before the onset of disease or before the onset of rain. After the onset of disease or high humidity, 80% of M.45 can be sprayed. Wet powder 600 times liquid, 50% fast-inking wettable powder 1500 times, 70% mancozeb wettable powder 400 to 500 times liquid, spray 60 kg per 667 square meters, every 5-7 days Spray 1 time, spray 3-4 times, and pay attention to supplement spray and field drainage after rain. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Pure Natural Salvia Extract,Mangosteen Peel Extract Powder,Natural Olive Extract Oleuropein,Pure Natural Radix Salvia Miltiorrhiza Extract Xi'an XJeson Biotech Co., Ltd , https://www.xjesonbio.com