Effect of Essential Oils on Feeding, Survival, Growth and Development of Third Instar Larvae of Helicoverpa armigera Hubner

Autor: Jaydeep Halder, Prem Dureja, Swaran Dhingra, Chitra Srivastava
Rok vydání: 2012
Předmět:
Zdroj: National Academy Science Letters. 35:271-276
ISSN: 2250-1754
0250-541X
Popis: The insect growth regulatory, antifeedant, adult inhibitory and egg laying capacity of essential oils from V. rosea and C. lanceolatus alone and their combinations at different ratios were evaluated against the third instar larvae of H. armigera by leaf residue method. It has been recorded that highest growth regulatory (GI50) at 3 and 7 DAT, antifeedant (AI50) at 24 h and adult inhibitory activities (I50) were observed at 1:1 mixture and their corresponding values were 4808, 3562, 4088 and 3046 ppm respectively. Similarly, the lowest egg production was also observed from 1:1 combination followed by 1:3 and 3:1. Among the two plants tested, V. rosea showed higher growth inhibitory, antifeedant and adult inhibitory activities and lowest fecundity than C. lanceolatus.
Databáze: OpenAIRE