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

K. Karthikeyan; S. Jacob; S. M. Purushothaman

doi:10.18311/jbc/2007/3902

Authors

K. Karthikeyan
Regional Agricultural Research Station, Kerala Agricultural University, Pattambi 679306, Kerala
S. Jacob
College of Horticulture, Kerala Agricultural University, Vellanikara, Thrissur
S. M. Purushothaman
Regional Agricultural Research Station, Kerala Agricultural University, Pattambi 679306, Kerala

DOI:

https://doi.org/10.18311/jbc/2007/3902

Keywords:

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

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.