K. S. Sangha , A. S. Sohi

Abstract

The studies on bioecology of Poplar leaf Defoliator, Clostera fulgurita (Walker) (Lepidoptera: Notodontidae) on Poplar were carried out at Entomological Research Farm, Punjab Agricultural University, Ludhiana. Biological studies revealed that the clones PL1, PL5 and PL7 had no effect on the duration of eggs, larvae, pupae and adults longevity. The egg, larval, pupal stage and adult longevity ranged from 3 to 6.42, 14.61 to 43.30, 6.50 to 55.50 and 4.93 to 7.35 days respectively. The defoliator had ten generations/year and the time taken to complete a generation varied from 27 to 94 days. Measurements of eggs, larvae, pupae and adults varied from 0.52 to 0.59 mm, 3.37 to 41.31 mm, 15.85 to 17.88 mm, and 2.87 to 3.87 cm (wing expanse) and 1.53 to 1.55 cm (body length) respectively. Pupation occurred in thin hairy cocoon between two leaves held together by silken thread. Fecundity varied from 268 - 669 among the clones. Maximum adult emergence and mating took place during 5.00 - 9.00 hours.

Keywords

Biology, Clostera fulgurita, Poplar Clones, Punjab

Full Text

     

Ravinder Singh , A. S. Sohi , K. S. Sangha

Abstract

Biology of Asphadastis cryphomycha Meyrick was studied on Populus deltoides under screen house conditions. Duration of the egg stage ranged from 4.40 to 6.90 days during different months. Total larval period, prepupal and pupal period varied from 12.60 ± 0.15 to 19.10 ± 0.17, 2.20 ± 0.15 to 89.60 ± 0.65 (December to March), and 4.60 ± 0.15 to 8.20 ± 0.81 days. The adults emerged during 23.00 to 4.00 hours (24 hour time). Longevity of females was more than males. The average fecundity ranged from 22.60 ± 2.18 to 49.60 ± 7.36 eggs during different months. The pre-oviposition, oviposition and post-oviposition periods were recorded. The webber passed through eight generations per year. Leaf area fed by the larval instars has been worked out. Detailed measurements of the various stages were recorded.

Full Text

     

Ravinder Singh , A. S. Sohi , K. S. Sangha

Abstract

No abstract

Full Text