Rice brown planthopper (BPH) (Nilaparvata lugens Stal, ) which occurs 4 generations within one year in Jiangsu Province has become a serious pest and causes loss of yield on rice every year in this region. The contact...Rice brown planthopper (BPH) (Nilaparvata lugens Stal, ) which occurs 4 generations within one year in Jiangsu Province has become a serious pest and causes loss of yield on rice every year in this region. The contact toxicities of imidacloprid and methamidophos to rice BPH were tested by means of immerse topical application method and a field trial from 1993 to 1994. A randomized complete design was laid out in 6 treatments with three replications.展开更多
Our previous studies revealed that second malevibration signal (SMVS) restrained the matingbehavior of N. lugens, the influences of threebiological features (density, age, and wingform) on SMVS’s inhibitory effect we...Our previous studies revealed that second malevibration signal (SMVS) restrained the matingbehavior of N. lugens, the influences of threebiological features (density, age, and wingform) on SMVS’s inhibitory effect were hereinstudied by playing back its record. The dura-tion of playback was 4 h. Except otherwisestatement, N. lugens tested were virginmacropterous males and females aged 4-6 d af-ter emergence, and the density was 5 pairs (5females and 5 males) of N. lugens per cage (4cm in diameter and 8 cm in height). The in-hibitory effect of SMVS was evaluated usingmating rate (i. e. the rate of females withspermatophore). The results were as follows:展开更多
文摘Rice brown planthopper (BPH) (Nilaparvata lugens Stal, ) which occurs 4 generations within one year in Jiangsu Province has become a serious pest and causes loss of yield on rice every year in this region. The contact toxicities of imidacloprid and methamidophos to rice BPH were tested by means of immerse topical application method and a field trial from 1993 to 1994. A randomized complete design was laid out in 6 treatments with three replications.
文摘Our previous studies revealed that second malevibration signal (SMVS) restrained the matingbehavior of N. lugens, the influences of threebiological features (density, age, and wingform) on SMVS’s inhibitory effect were hereinstudied by playing back its record. The dura-tion of playback was 4 h. Except otherwisestatement, N. lugens tested were virginmacropterous males and females aged 4-6 d af-ter emergence, and the density was 5 pairs (5females and 5 males) of N. lugens per cage (4cm in diameter and 8 cm in height). The in-hibitory effect of SMVS was evaluated usingmating rate (i. e. the rate of females withspermatophore). The results were as follows:
基金This work was supported by the National High Technology Research and Development Program of China (863 Program, No. 2003AA222131, 2003AA207020) High Technology Project of Jiangsu Province (No. BG2004303) National Science and Technology Attack Project (No. 2004BA525B02-04).
基金supported by China National Natural Science Foundation(30360053)Science and Technology Department of Guangxi(Project No.Gui Ice Neng 05112001-1A1)Guangxi Key Labo ratory of Subtropical Bioresource Conservation and Utilization.
