Indian Journal of Plant Protection
  • Year: 2000
  • Volume: 28
  • Issue: 2

Efficacy of Imidacloprid Applied in Nursery Against Leaf Folder and Stem Borer in Rice*

  • Author:
  • A. Ramesh Babu, T. Ratna Sudhakar, T. Ramesh Babu1, M. Sreeramulu1, A. Satyanarayana2
  • Total Page Count: 4
  • Page Number: 180 to 183

1Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad-500030, Andhra Pradesh, India.

2Computer Centre, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad, 500030, Andhra Pradesh, India.

Rice section, Agricultural Research Institute, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad-500030, Andhra Pradesh, India.

* A part of M.Sc (Ag) thesis submitted to ANGRAU, Hyderabad, Andhra Pradesh by die first airthor.

Abstract

Effectiveness of different treatments with imidacloprid 200 SL were evaluated against leaf folder (Cnaphalocrosis medinalis Guenee) and stem borer (Scirpophaga incertulas Walker) incidence in rice. Sprouted seed soaking at 0.05% for 3hr before sowing offered good protection against leaf folder than other treatments. Foliar application five days before pulling @ 25 g a.i./ha was found effective up to 30 DAT (days after transplantation) in reducing stem borer incidence. Soil application @ 37.5 g a.i./ha 10 days before pulling increased the incidence of stem borer at both 30 and 40 DAT. Foliar spray at higher concentration (37.5 g a.i./ha) recorded much higher population of stem borer.