Experiments on the applicaton of botanical insecticides for the control of diamondback moth in South China
1993
Chiu Shin-Foon (South China Agricultural Univ., Guangzhou (China). Lab. of Insect Toxicology) | Qiu Yu-Tong
The effectiveness of 5 species of plants from south China possessing insecticidal properties were tested against the larvae of diamondback moth. A crude dichloromethane extract of the flowers of Rhododendron molle was found to be a strong antifeedant against the 3rd instar larvae. It was effective against a strain resistant to fenvalerate. The chloroform extract of Ajuga nipponensis possessed high antifeedant and growth regulating activity against the 4th instar larvae. Wilforine, an alkaloid obtained from Tripterygium wilfordii, was more effective than Dimilin against 3rd instar larvae. A formulation made up of a neem extract AZT-VR-K and cartap could increase the effectiveness. Botanical insecticides are compatible with IPM programs for controlling vegetable insects. Natural products from plants are a source of bioactive substances, which have been exploited only to limited extend
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