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Bio-efficacy of newer insecticides against head borer, Helicoverpa armigera (Hubner) infesting sunflower

Article Id: 028 | Page : 130-132
Citation :- Bio-efficacy of newer insecticides against head borer, Helicoverpa armigera (Hubner) infesting sunflower. Crop Res. 46: 130-132
Rohit Nain, S. S. Dashad, S. P. Singh ssdashad@rediffmail.com
Address : CCSHAU Regional Research Station, Bawal, District Rewari-123 501, Haryana, India; 1Sr. Scientist (Entomology), CCS Haryana Agricultural University, Hisar-125 004, Haryana, India.

Abstract

A field experiment was conducted during spring 2008 to evaluate the efficacy of some new insecticides in the management of head borer, Helicoverpa armigera (Hubner) on sunflower crop. The results revealed that maximum larval mortality (84.81%) and maximum yield (3294 kg/ha) were obtained with the treatment spinosad, which was at par with endosulfan (82.28% and 3255 kg/ha, respectively) and followed by quinalphos (72.93% and 3147 kg/ha, respectively). Bacillus thuringiensis (Bt.) brand Kurstaki and cypermethrin failed to give an appreciable control. Endosulfan treatment provided maximum (1: 21.3) cost: benefit ratio followed by quinalphos (1: 15.8).

Keywords

Bio-efficacy  Cost: benefit ratio  Helicoverpa armigera  Insecticides  Sunflower.

References

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