Biology and eco-friendly management of cabbage butterfly Pieris brassicae L.
Loading...
Date
2022-12-04
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
College of Horticulture and Forestry Neri, Hamirpur (H.P.)
Abstract
The present investigation entitled “Biology and eco-friendly management of
cabbage butterfly Pieris brassicae L.” was carried out in the Department of Entomology,
College of Horticulture and Forestry, Neri, Hamirpur (HP). Studies on the biology revealed
that pre-oviposition, oviposition and post-oviposition periods were 1.60, 3.60 and 1.8 days,
respectively. A single female butterfly laid 128.60 ± 9.50 eggs, which hatched in 5.50 ± 0.02
days. Mean duration of the 1st, 2nd, 3rd, 4th and 5th larval instars was 4.70, 4.50, 4.30, 4.80
and 5.50 days, respectively with a total larval period of 23.50 days. The pre-pupal and pupal
stage lasted for 1.50 ± 0.02 and 10.50 ± 0.02 days, respectively. The male and female
completed total life cycle in 40.00 ± 0.44 and 42.40 ± 0.68 days. Morphometric study
revealed that the egg measured 1.08 ± 0.01 mm in diameter. Average body length of the 1st,
2nd, 3rd, 4th and 5th larval instars was 6.01 ± 0.02, 11.88 ± 0.12, 21.64 ± 0.32, 31.09 ± 0.48
and 38.29 ± 0.18 mm, respectively. All the pesticides tested viz., spinosad 45% SC,
emamectin benzoate 5 SG, Azardirachtin 0.15% EC, Bacillus thuringiensis var. Kurstaki 0.5
WP, Beauveria bassiana 1 WP and Agni astra for the management of P. brassicae were
found to be superior over control. Among the different pesticides tested spinosad 45% SC @
0.004% was found to the be most effective for managing population of P. brassicae, while
Agni Astra was the least effective.