Effectiveness of Cartap Hydrochloride against Rice Stem Borer and Leaffolder and its Safety to Natural Enemies


Affiliations

  • Kerala Agricultural University, Regional Agricultural Research Station, Kerala, 679306, India
  • Kerala Agricultural University, College of Horticulture, Vellanikara, India

Abstract

Four field experiments conducted to evaluate the efficacy of cartap hydrochloride @ 1 kg a.i./ha in comparison with check insecticide carbofuran during 1999 (I crop season), 2000 (I crop season) and 2001 (I and II crop seasons) showed that cartap hydrochloride treatment in nursery five days before pulling rice seedlings had reduced incidence of dead hearts (35.6 %) and white ear (28.4 %) caused by yellow steniborer, Scirpophaga incertulas Walker and reduced leaf damage by leaf folder, Cnaphalocrocis medinalis Guenee by 47.7 percent with increased grain yield in comparison with check insecticide (carbofuran) drenched seedlings. The cartap hydrochloride drenched seedlings supported higher population of natural enemies like spiders (Tetragnatha sp.) while other natural enemies like damselflies (Agriocnemis sp.), green mirid bugs (Cyrtorhinus lividipennis) and larval parasitoids (Stenobracon sp.) were on par with the untreated plots.

Keywords

Carbofuran, Cartap Hydrochloride, Leaffolder, Natural Enemies, Rice, Stem Borer.

Subject Discipline

Entomology

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