BIOLOGY OF WHITE GRUB HOLOTRICHIA LONGIPENNIS

BIOLOGY OF WHITE GRUB HOLOTRICHIA LONGIPENNIS (BLANCHARD) (COLEOPTERA: SCARABAEIDAE) IN AGRICULTURAL ECOSYTEM OF DOON VALLEY, (UTTARAKHAND), INDIA

1Pushpendra K. Sharma, 2Mukesh Lal and 3Prakash Chandra Joshi
1&2Department of Zoology, D.A.V. (P.G.) College, Dehradun-248001 (U.K.), India
3Department of Zoology & Environmental Science, Gurukul Kangri University, Haridwar (U.K.), India
Corresponding Author, Email1:insect1980@rediffmail.com

Received: 28-02-2019                                                                                                                   Accepted: 04-05-2019
Present study was carried out to know the Biology of white grub Holotrichia longipennis (Blanch.) (Coleoptera: Scarabaeidae) collected from agricultural ecosystem with reference to ecological conditions of Doon Valley. Holotrichia longipennis is a dominant species among the scarabaeid beetles and commonly distributed throughout India. Emergence of beetle is begun at the end of May when first pre-monsoon rain occurred, but peak emergence was observed in the second and third week of June after heavy rainfall. Maximum numbers of beetles were trapped during second and third week of June. Grubs were found throughout the year, causing severe damage to potato plants and tubers. The males of this species show marked territorial behavior and chase the intruding conspecific females. The observed copulation period was 18±2.52 min. The oviposition period was 10.9±2.77 days. The incubation period of eggs was 14.10±0.25 days. Larval period remained for 234 to 285 days. The pupal stage lasts for 10.30±0.19 days. The adult female is oval, slightly larger than male. This stage lasts for 25.30±1.69 days.
Key words: Biology, White Grub, Holotrichia longipennis, Agricultural Ecosystem

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