FORSKOLIN INDUCED MORPHOLOGICAL AND OVARIAN DEFORMITIES IN THE EXORISTA BOMBYCIS (UZI FLY) AND ANTI-FEEDENT ACTIVITY OF FORSKOLINAbstract
Forskolin is a heterocyclic labdane-type diterpenoid extracted from the roots of the plant of Coleus forskohlii (Lamiaceae) has been studied in depth for its broad range of pharmacological properties. Coleus forskohlii aids in the control of pestilence of Uzi fly, Exorista sorbillans, and Exorista bombycis one of the gravest ecumenical pests in sericulture industry. Forskolin affected moulting; development and metamorphosis of Uzi fly and induced various types of morphological abnormalities in Uzi fly. The treated resultants of fifth instar Uzi fly maggots, a few of them died during moulting, some of them developed into maggot-pupal and pupal-adult intermediates, abnormal pupae, abnormal adults and remaining treated fifth instar maggots developed into morphologically normal adults exhibiting reduced fecundity when compared to the controls. Coleus forskohlii root extract (CFRE) exhibited growth-regulating activity on the Uzi fly. They affected pupal- adult transformation and produced intermediates along with ovarian deformities deformed adults and also affected the inhibition of pupation and adult emergence. The plant extract repressed the growth and development suggesting its use for effective control of pests like Uzi flies at larval stages. Forskolin can also be used as an antifeedant substance against Uzi fly larval stages.
S. Y. Nayini *, C. S. R. Nalagoni and S. S. Raju
Department of Zoology, Sarojini Naidu Vanita Maha Vidhyala, Hyderabad, Telangana, India.
18 October 2019
04 April 2020
25 August 2020
01 October 2020