Biology and Management of Bud Borer (Helicoverpa armigera Hub.) on Rose in South Gujarat

Abstract

Biology of Helicoverpa armigera Hubner was studied on rose under laboratory condition at 24.03 ± 1.75 0 C and average relative humidity of 53.9 ± 3.04 per cent during November - December 2006. The egg, larval, pupal and adult periods were 3.72 ± 0.79, 24.16 ± 2.25, 10.44 ± 1.36 and 5.40 ± 1.04 days for male and 8.84 ± 1.91 days for female, respectively. The life cycle was completed in 39.40 ± 2.33 days for male and 42.96 ± 2.47 days for female, respectively. The pre-oviposition, oviposition and post-oviposition periods were 2.76 ± 0.83 , 5.36 ± 0.99 and 0.84 ± 0.85 days, respectively. The female moth laid an average of 631.8 ± 208.3 eggs during its life span. The sex ratio (female: male) of 1: 0.72 was recorded in laboratory. Indoxacarb 0.0075 and spinosad 0.002 per cent were effective in checking the bud borer population with 1.29 and 1.57 larva/ plant and net CBR 1:6.00 and 1:8.34, respectively. The ascending order of remaining treatments in effectiveness was; novaluron, endosulfan, imidacloprid, thiamethoxam, clothianidin and acetamiprid.

DOI

https://doi.org/10.29321/MAJ.10.100204

Pages

824 - 828

Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords