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Growth-regulatory activity of Trichilia connaroides (syn. Heynea trijuga) leaf extracts against the Bihar hairy caterpillar Spilosoma obliqua (Lepidoptera: Arctiidae)
Published online by Cambridge University Press: 16 December 2009
Abstract
Hexane and acetone extracts of Trichilia connaroides leaves were evaluated for their biological activity against the Bihar hairy caterpillar Spilosoma obliqua Walker, a destructive pest of crop, medicinal and ornamental plants. Fresh caster (Ricinus communis) leaves treated with a range of concentrations (1–10%) of the extracts were offered to 2nd instars for 120 h, followed by untreated leaves until pupation. Acetone extracts exerted better growth-regulatory properties than hexane extracts, shown by morphogenic malformation and adverse effects on the insect's larval duration, pupal duration, adult emergence and fecundity.
Keywords
- Type
- Research Paper
- Information
- International Journal of Tropical Insect Science , Volume 29 , Issue 4 , December 2009 , pp. 180 - 184
- Copyright
- Copyright © ICIPE 2009
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