Biology and Management of Bud Borer (Helicoverpa armigera Hub.) on Rose in South Gujarat
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Author:R.S. Patel, K.A. Patel, K.S. Patil and N.R. Toke
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:oct-dec
DOI: https://doi.org/10.29321/MAJ.10.100204
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.
Key words : H. armigera , biology, rose, indoxacarb, spinosad.