| 애멸구 대량 비래후 살충제 처리와 벼줄무늬잎마름바이러스(Rice stripe virus) 발생 관계 조사 |
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정태우 ( Tae Woo Jeong ) , 김병련 ( Byung Ryun Kim ) , 한광섭 ( Gwang Seop Han ) , 강동우 ( Dong Woo Kang ) , 정임영 ( Lim Young Jeong ) , 임현섭 ( Hyoun Sub Lim ) , 김정수 ( Jeong Soo Kim ) |
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| Evaluation of Pesticide Treatment for Control of Rice stripe virus after Mass Migration of Small Brown Planthoppers |
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Tae Woo Jeong, Byung Ryun Kim1, Gwang Seop Han1, Dong-Woo Kang2, Iim Young Jeong, Hyoun-Sub Lim2* and Jeong Soo Kim3** |
Chungnam Tean Agriculture Technology & Extension, Taean 357-903, Korea
1Agricultural Environment Division, Chungcheong nam-do Agricultural Research & Extension Services,
Yeosan 340-961, Korea
2Chungnam National University, College of Life Sciences and Agriculture, Department of Applied Biology, Daejeon 305-764, Korea
3Crop Protection Division, National Academy of Agricultural Service, Suwon 441-707, Korea |
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Received: July 21, 2012 Revised: August 17, 2012 Accepted: August 22, 2012 |
| Abstract |
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The small brown planthopper (Laodelphax striatellus) is one of the most important rice pests in Republic of Korea because it damages rice plants not only by sap-sucking but also by transmitting Rice stripe virus (RSV). Outbreaks of RSV are closely related to outbreaks of the small brown planthopper (SBPH). Therefore, it is very important to control SBPH for the management of RSV. Mass-migrating SBPH collected by aerial net traps in June 2011 at Taeanup, Geunheungmyon and Gonammyon in Taeangun were examined for virus carrier status and effects of the pesticide, ‘Myungtaja’, on the control of RSV. Among 1,217 SBPH trapped, about 7.7% were detected as RSV positive and 4.4% were positive for Rice black streak dwarf virus (RBSDV) by RT-PCR. After the mass migration, pesticide ‘Myungtaja’ was sprayed once or twice on rice fields and compared to untreated fields. The incidence of RSV was not affected by the frequency of spraying ‘Myungtaja’ but was influenced by the time of pesticide treatment. Myungtaja’ treatment within 5?7 days after mass migration resulted in the most efficient RSV control, resulting in RSV incidence decreased by 87.6% compared to the control. Therefore, we conclude that pesticide spraying for RSV control was most effective when it was done within 5?7 days after mass migration. |
| Key Words:
Mass migration, Myungtaja, Rice stripe virus, Small brown planthopper |
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