Department of Entomology, Acharya N G Ranga Agricultural University, Agricultural College, Bapatla - 522 101, Guntur, Andhra Pradesh, India. E mail: raoento@yahoo.co.in
$ Present address: AINP on Rodent Control, APRRI & RARS, Maruteru-534 122, West Godavari Dist, Andhra Pradesh, India.
*A part of Ph.D thesis submitted to Acharya N G Ranga Agricultural University, Rajendranagar by the first author.
Novaluron, potentiated all the insecticides tested in combination both by dermal and oral administrations against the 3rd instar larvae of Helicoverpa armigera in laboratory studies and the highest potentiation was observed in novaluron + indoxacarb mixture with co-toxicity factors of 65.8 and 70.0 under dermal and oral toxicity studies, respectively. Under field conditions, combination treatments containing Novaluron + insecticide, registered superior performance in containing the bollworm damage and gave high seed cotton yield over the corresponding individual treatments.
Novaluron, Helicoverpa armigera, potentiation, co-toxicity factor
