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Occurrence and Chemical Control Techniques of Rice Black-streaked Dwarf Disease in Rongshui County
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作者 Riwei HUANG Rongqing MO +1 位作者 Changhua TANG Zishuai SHANG 《Agricultural Biotechnology》 CAS 2021年第6期19-21,共3页
The chemical control technologies of southern rice black-streaked dwarf disease in hybrid rice were studied in Rongshui County,Guangxi,through a combination of investigation,observation and experiments.Three treatment... The chemical control technologies of southern rice black-streaked dwarf disease in hybrid rice were studied in Rongshui County,Guangxi,through a combination of investigation,observation and experiments.Three treatments were set up,namely,no water,shallow water and deep water,and each of which had a treatment area of 67 m^(2).Each treatment was sprayed once with 40 g of 200 million/g Bacillus subtilis wettable powder and 20-30 g of 25%pymetrozine wettable powder per 667 m^(2) in a mixture with 30 kg of water.On the day of spraying,100 diseased rice hills in each treatment were marked for field observation.The test results showed that the control of southern rice black-streaked dwarf disease should be done by draining the field water and spraying the mixture of B.subtilis and pymetrozine evenly,and a better effect can be achieved by keeping the field moist for 6-7 d after spraying. 展开更多
关键词 Rice Black-streaked dwarf disease Bacillus subtilis PYMETROZINE
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