Physiology of insecticide-induced stimulation of reproduction in the rice brown planthopper (Nilaparvata lugens (Stål)): dynamics of protein in fat body and ovary

Effects of Pesticide Applications on the Biochemical Properties of Transgenic cry 2A Rice and the Life History Parameters of Nilaparvata lugens Stål (Homptera: Delphacidae)

“…Furthermore, the content of oxalic acid in MH63 treated with 20 ppm triazophos and 40 and 80 ppm chlorantraniliprole was significantly higher than that in T2A-1, while the content of soluble sugar in T2A-1 treated with 400 ppm jinggangmycin was significantly higher than that in MH63, which indicated that the difference in the population growth of N. lugens between the two cultivars may be attributed to physiological and biochemical effects of the pesticide on different rice cultivars fed by N. lugens. Our previous study also indicated that triazophos foliar spray stimulates the reproduction and enhances flight capabilities of N. lugens (Ge et al 2010;Hu et al 2010;Zhao et al 2011). Meanwhile, the contents of oxalic acid and soluble sugar in rice plants are important indices for evaluating the resistance of rice to N. lugens (Nagata and Hayakawa, 1998;Wu et al 2001).…”

“…N. lugens will be affected by not only transgenic Bt rice but also pesticide applications. Furthermore, it has been reported that some pesticides can stimulate reproduction of N. lugens (Ge et al 2010;Hu et al 2010).…”

Sublethal pesticide exposure improves resistance to infection in the Asian corn borer

“…Our experiment, however, revealed an opposite trend, which enhanced the insect immune function, and may be a concurrent hormesis. A sublethal dose of insecticide and other stressors applied to insects can induce changes in life-history traits (Zibaee & Bandani, 2010;Cutler, 2012), as well as the reallocation and redistribution of resources (Wojda et al, 2009;Hu et al, 2010). The hormesis phenomenon was found to occur over a wide range of insecticides, e.g.…”

“…In the diamond moth (Plutella xylostella), a sublethal dose of chlorpyrifos was found substantially to increase the activity of several enzymes, such as acetylcholinesterase and glutathione S-transferases (Deng et al, 2016). A sublethal dose of insecticide and other stressors applied to insects can induce changes in life-history traits (Zibaee & Bandani, 2010;Cutler, 2012), as well as the reallocation and redistribution of resources (Wojda et al, 2009;Hu et al, 2010). It appears that tebufenozide, an IGR, might have a similar effect on the immune function of ACB larvae.…”

Stimulation of vitellogenin gene expression by permethrin in the brown planthopper, <i>Nilaparvata lugens</i> (Hemiptera: Auchenorrhyncha: Delphacidae)

“…4,5) One of the serious problems for control of N. lugens by insecticide is resurgence, and investigation has focused more on the ecological aspects of resurgence. 6,7) However, during the last decade, works have been progressing to realize the physiological mechanisms of resurgence and to induce higher fecundity of N. lugens by insecticide application. In most female insects, fecundity is largely reflected in the synthesis of vitellogenin (Vg), the precursor of yolk protein, which is synthesized in the fat body under regulation of the juvenile hormone (JH), transported by the hemolymph to the ovary, and deposited as vitellin to be utilized for embryogenesis.…”