AUTHOR(S)
P. Kombiah and K. Sahayaraj*

ABSTRACT

Botanicalpesticides have pesticidal or ovicidal or ovipositional or antifeedant orrepellent activities. The development of resistance to existing conventionalsynthetic pesticides and the increasing public concern over environmentalpollution and health hazards created by synthetic pesticides, generate a greatneed for new types of pest management agent’s advantage with higher activityagainst the target pests, and lower impact on humans and environmental quality.By keeping this idea in our mind, experiments were carried out to formulate andto determine the repellency of thallus extract and emulsifiable concentrations(EC) of Caulerpa scalpelliformis (R.Br.) Web. V. Bosse against thirdstadium Spodoptera litura larvae and Dysdercus cingulatus nymphsby Yshape olfactometer. Obtained results indicated that the formulated sea weedextract showed more repellent property than crude extract in dose dependentmanner. Crude chloroform extract highly repel S. litura (API = -1.00 at150 min after exposure) than D. cingulatus (API = -1.00 at 180 min afterexposure) than methanol and hexane extract of C. scalpelliformis. Allthe prepared EC formulations (EC 0.2, 0.4, 0.6, 0.8 and 1.0%) having good physicallystable and were highly effective against S. litura and D. cingulatus respectively.Hence, C. scalpelliformis -based formulation can be utilized forthe management of agricultural pests like S. litura and D.cingulatus.

DOI
https://doi.org/10.57182/jbiopestic.5.0.145-150

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