Indian Journal of Entomology
Open Access
SCOPUSWeb of Science
  • Year: 2026
  • Volume: 88
  • Issue: 1

Feeding Behaviour of Pymetrozine-Resistant and Susceptible Strains of Brown Planthopper Nilaparvata lugens (Stal)

  • Author:
  • S M Rahman1, C Narendra Reddy1, Y Sridhar2,*, M Sheshu Madhav3, J Suresh1, D Dhyan Chowdary2,4, P Jeya Kumar2
  • Total Page Count: 4
  • Page Number: 203 to 206

1College of Agriculture, Rajendranagar, PJTAU

2ICAR-Indian Institute of Rice Research, Hyderabad500030, Telangana, India

3ICAR-Central Tobacco Research Institute, Rajahmundry533105, Andhra Pradesh, India

4Department of Entomology, Acharya N G Ranga Agricultural University, Lam, Guntur522034, Andhra Pradesh, India

*Email: yerramsridhar303@gmail.com (corresponding author):

Online published on 26 February, 2026.

Abstract

Feeding behaviour of pymetrozine-resistant (Pym-R) and pymetrozine-susceptible (Pym-S) brown planthopper Nilaparvata lugens Stal strains were investigated using standard honeydew and probing tests. Under both the treated and untreated conditions the food consumption of Pym-R strain was higher (4.0 and 12.4 cm2 area of honeydew respectively) compared to Pym-S strain (2.7 and 7.1 cm2, respectively). Probing activity of both the Pym-R and Pym-S strains increased on rice seedlings treated with pymetrozine (35 and 26 probing marks, respectively) compared to untreated seedlings (12 and 13 probing marks, respectively) and on treated seedlings the Pym-R insects probed more (35 probing marks) as compared to Pym-S insects (26 probing marks). Plausible reasons for differences in the feeding behaviour of pymetrozine resistant and susceptible populations is discussed.

Keywords

Honeydew, Insecticide, Rice, Nilaparvata lugens, Strains, Insecticide resistance, Pymetrozine, Probing marks, Feeding, Susceptible