Author:
Thakre B. A.,Bhamare V. K.
Abstract
The fall army worm, Spodoptera frugiperda (J E Smith) (Noctuidae; Lepidoptera) is a recently introduced polyphagous pest, poses a potential threat to cotton cultivation in India. Therefore, laboratory assays were conducted on different public sector Bt cotton hybrids to study the survival and development of the pest. The results confirmed significantly (p=0.05) higher mortality of early larval instars, than the later. The surviving larvae showed adverse effects on the growth and developmental parameters along with low growth and survival indices. S. frugiperda reared on leaves (60-80 days old crop) and squares (90-110 days old crop) showed low growth and survival indices values, compared to those reared on young bolls (120-140 days old crop) and mature bolls (150-170 days old crop). Among the different public sector Bt cotton hybrids, significantly superior results were exhibited by the PKV Hy-2 BG II when larvae fed on leaves and squares, and the NHH-44 BG II when fed on young and mature bolls.
Publisher
The Entomological Society of India
Subject
Insect Science,Agronomy and Crop Science,Ecology,Ecology, Evolution, Behavior and Systematics
Reference33 articles.
1. Adamczyk Jr J J, Adams L C, Hardee D D. 2001. Field efficacy and seasonal expression profiles for terminal leaves of single and double Bacillus thuringiensis toxin cotton genotypes. Journal of Economic Entomology 94(6): 1589-1593.
2. Adamczyk Jr J J, Greenberg S, Armstrong J, Mullins J W, Braxton L, Lassiter R, Siebert M W. 2008. Evaluations of Bollgard®, Bollgard II®, and Widestrike® technologies against beet and fall armyworm larvae (Lepidoptera: Noctuidae). Florida Entomologist 91(4): 531-536.
3. Adamczyk Jr J J, Hollowly J W, Church G E, Graves J B, Leonard B R.1998. Larval survival and development of the fall armyworm(Lepidoptera: Noctuidae) on normal and transgenic cottonexpressing the Bacillus thuringiensis Cry IA(c) endo-toxin. Journal of Economic Entomology 91(2): 539-545.
4. Adamczyk Jr J J, Gore J. 2004. Laboratory and field performance of cotton containing Cry 1Ac, Cry 1F and both Cry 1Ac and Cry 1F (Widestrike) against beet armyworm and fall armyworm larvae (Lepidoptera: Noctuidae). Florida Entomologist 87(4): 427-432.
5. Armstrong J S, Adamcyzk Jr J J, Greenberg S M. 2011. Efficacy of single and dual gene cotton Gossypium hirsutum events on neonate and third instar fall armyworm, Spodoptera frugiperda development based on tissue and meridic diet assays. Florida Entomologist 94(2): 262-271.