Feeding Behavior of Imidacloprid Resistant Brown Planthopper, Nilaparvata lugens (Stål)
Dhyan Chowdary. D
Department of Entomology, Acharya N G Ranga Agricultural University, Lam, Guntur- 522034, Andhra Pradesh, India and Department of Entomology, ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad- 500030, India.
Ramachandra Rao. G
Department of Entomology, Acharya N G Ranga Agricultural University, Lam, Guntur- 522034, Andhra Pradesh, India.
Sheshu Madhav. M
ICAR- Central Tobacco Research Institute, Rajahmundry - 533105, Andhra Pradesh, India.
Latha. P.C
Department of Microbiology, ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad- 500030, India.
Malathi. V.M
Department of Biochemistry, ICAR- Indian Institute of Millets Research, Rajendranagar, Hyderabad- 500030, India.
Sridhar. Y *
Department of Entomology, ICAR- Indian Institute of Rice Research, Rajendranagar, Hyderabad- 500030, India.
*Author to whom correspondence should be addressed.
Abstract
A study was conducted to investigate the feeding behavior of imidacloprid resistant (RS) and laboratory (LS) strains of brown planthopper, Nilaparvata lugens, by using standard honeydew and probing tests. The honeydew production was higher in RS strain (7.12 and 14.63 cm2) as compared to LS strain (5.44 and 1.86 cm2) in both the imidacloprid treated and untreated conditions, respectively. The probing test revealed an increased probing activity by both the LS and RS strains on imidacloprid treated seedlings as compared to the untreated. The number of probing marks by LS and RS strains on the treated seedlings were 16 and 31, whereas in untreated seedlings 7 and 11 respectively. These results established the higher feeding capacity of imidacloprid resistant N. lugens strain as compared to the laboratory strain, measured in terms of probing behaviour and honeydew production.
Keywords: Honeydew, probing, insecticide, imidacloprid, resistance, rice, brown planthopper