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Yu, Xiaoping,Lu, Zhongxian,Wu, Guorui,Tao, Linyong,Chen, Jianming,Zheng, Xusong,Xu, Hongxing Korean Society of Applied Entomology 2001 Journal of Asia-Pacific Entomology Vol.4 No.2
The virulence change (biotype), wing form development and immigration of brown planthopper (BPH) Nilaparvata lugens Stal, population in Zhejiang province was studied as compared to these BPH populations collected from Guangxi and Yunnan province, China and Philippines. The results indicate that the Zhejiang population could successfully infest variety IR26 and Mudgo after 1989, and ASD7 and IR36 after 1998, showing the characters of BPH biotype 2 and biotypes 3. The BPH tropical populations such as Guangxi population, however, adapted the resistant varieties IR26, Mudgo and ASD7 earlier. In 1997, the nymphal survival indices of Guangxi and Yunnan populations on Rathu Heenati (Bph3) were up to 70.9 and 66.7 respectively, higher than Zhejiang population. The Zhejiang populations show low brachupterous rates and have a negative correlation with nymphal density, belonging to the temperate type. The Philippine populations are almost brachypterous, however, the brachypterous rates of BPH males raise with the increase of nymphal density. The Guangxi population has a high brachypterous rate, being similar to the tropical type. On the other hand, tests showed that the lowest survival rate, longer duration of nymphs and the lightest weight of brachypterous female occurred in the $2^{nd}$ generation of BPH after continuously feeding on resistant variety. Physiologically, the highest activities of superoxide dismutase (SOD) and catalase (CAT) were detected in the second generation of the BPH feeding on resistant rice variety.
Imidacloprid의 아치사량이 벼멸구(Nilaparvata lugens Stål)의 생물적 특성에 미치는 영향
최병렬(Byung-Ryul Choi),이시우(Si-Woo Lee),송유한(Yoo-Han Song),한만종(Man-Jong Han),유재기(Jai-Ki Yoo) 한국농약과학회 2000 농약과학회지 Vol.4 No.2
Effects of sublethal dose of imidacloprid on biological characteristics, such as longevity, fecundity and excretions from brown planthopper (BPH) and its repellency to imidadoprid were examined. Topical application of imidadoprid to BPH at the dose of LD₁? and LD₃? (These values were determined at 48 hours after topical application of imidadoprid) was remarkably increased the mortality from 3 days after application and showed over 90% mortality on 4 days after application. Topical application of imidacloprid at dose of LD₁? (16 days) showed no difference compared to the control (16.9 days) in the longevity, while application of LD₃? was reduced the longevity of BPH to 13.5 days. Application of sublethal dose of imidadoprid to BPH adults reduced the number of eggs laid per day and for adult stage, and the hatchability of their eggs. By root zone application at the dose of LC₃?, 50% longevity and 40% fecundity was reduced respectively, but showed no effect on number of eggs laid per day. The day on which BPH laid 50 % of eggs in number were 7.6 days at the LC₁? and 5.9 days the of LC₃? respectively. Hatchabilities of the groups treated with imidadoprid were lower than that of the control. Topical application to BPH at the dose of LD₁? did not reduce the amount of excretes, but application at the dose of LD₃? was reduced 26.5% of excretion compared to the control. Leaf dipping into the solution of concentration of LC₁? and LC₃? was reduced 96.4% and 98.0% of excretion, respectively. And root zone treatment at the concentration of LC₁? and LC₃? reduced 79.5% and 96.6% of excretion, respectively. Repellency rates of BPH to imidadoprid were 20% regardless of the dose of application.
Un Sang Yeo,Do Yeon Kwak,Jeom Sig Lee,Woon Goo Ha,Jae Ki Jang,No Bong Park,Sang Jong Lim,Jung Hoon Kang,Ho Yeong Kim,Sae Jun Yang 한국육종학회 2003 한국육종학회지 Vol.35 No.2
This study was carried out to develop a prom ising japonica rice variety resistant to brown planthopper(Bph) through marker-assisted selection(MAS) and backcross breeding methods. 'Milyang 64' which is known as resistant japonica variety to Bph used as a
이미다클로프리드 저항성 벼멸구의 살충제 교차저항성과 두 종류 벼 품종(친농과 추청)에서의 발육특성
정인홍(In-Hong Jeong),전성욱(Sung-Wook Jeon),이상구(Sang-Ku Lee),박부용(Bueyong Park),박세근(Se-Keun Park),이상범(Sang-Bum Lee),최낙중(Nak Jung Choi),이시우(Si-Woo Lee),이시혁(Si Hyeock Lee),권덕호(Deok Ho Kwon) 한국농약과학회 2017 농약과학회지 Vol.21 No.4
The purpose of this study is to analyze the growth characteristics of imidacloprid resistant brown planthopper (BPH) on the two rice varieties (BPH resistant variety, Chinnong and BPH susceptible variety, Chuchung). The mortalities of resistant- and susceptible- strains were 2.7% and 100% after 72 hr treatment in the recommended concentration (RC, 20 ppm) of imidacloprid, respectively, and the LC<SUB>50</SUB> of resistant strain revealed 17.8 fold higher than that of susceptible strain. Moreover, the resistant strain revealed the cross resistance against four neonicotinoids (acetamiprid, clothianidin, thiamethoxam and thiacloprid), but not for carbamate (fenobucarb), pyrethroid (etofenprox) and sulfoxamine (sulfoxaflor) insecticides. In the comparison of development characters on life table between susceptible and resistant strain for two rice varieties, the resistant strain which was reared on Chinnong variety showed low nymphal period, female longevity, fecundity, net reproduction rate (R<SUB>0</SUB>), intrinsic rate of increase (r<SUB>m</SUB>) and high doubling time (D<SUB>t</SUB>). The results indicate that the cultivation of BPH resistant variety would be an effective strategy in the imidaclopridresistant BPH management.