Pesticide‐induced susceptibility of rice to brown planthopper Nilaparvata lugens

Abstract

The effects of rice plants treated with various pesticides (jingganmycin, bisultap and methamidophos) on feeding, survival rates and population growth of Nilaparvata lugens Stål (Homoptera: Delphacidae), susceptibility of the treated rice plants and amounts of free amino acids and sucrose were studied. Experiments indicated that the effects of the tested pesticides were dependent on nymphal age, pesticide and their dose and time after application. Jingganmycin at 75 g a.i. ha−1 significantly increased the N. lugens population. Both jingganmycin and bisultap increased the survival rate of N. lugens nymphs. The feeding rate of the insects was also affected by the pesticide application, but the effect varied between nymphal age and time after application and lasted no longer than 15 d. Results clearly indicated that pesticide application increased the susceptibility of rice plants to N. lugens. Although the free amino acids in rice plants did not change with the pesticide treatments, the concentration of sucrose significantly decreased 5 d after application and the C/N ratio significantly decreased in jingganmycin treated plants 5 d and 10 d after application.

Sublethal effects of nitenpyram on life-table parameters and wing formation of Nilaparvata lugens (Stål) (Homoptera: Delphacidae)

“…One of the important factors causing the resurgence of insect pests is the stimulation of reproduction and survival by sublethal doses of insecticides; for example, jingganmycin at 75 g a.i. ha Ϫ1 significantly increased the N. lugens population (Wu et al, 2001).…”

Effect of fipronil on the reproduction, feeding, and relative fitness of brown planthopper, Nilaparvata lugens

“…Resurgence of insect pests after pesticide applications is a well-documented phenomenon. One of the important factors causing the resurgence of insect pests is the stimulation of reproduction and survival by sublethal doses of insecticides; for example, jingganmycin (an antibiotic compound) and bisultap (a nereistoxin insecticide) increased the survival rate of N. lugens nymphs (Wu et al, 2001a). Jingganmycin at 75 g a.i.ha Ϫ1 significantly increased the brown planthopper (BPH) population (Wu et al, 2001a, b).…”

Integrated pest management for sustainable rice cultivation: a holistic approach

“…These studies have focused not only on a range of insecticides, but also on molluscicides, fungicides and herbicides that increase herbivore fitness (e.g. Grigarick et al, 1990;Wu et al, 2001;Wang et al, 2005;Assam et al, 2009;Xin et al, 2012;Horgan et al, 2014b).…”