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- Title
Repellent activity of Caulerpa scalpelliformis extracts and its formulations against Spodoptera litura and Dysdercus cingulatus (Fab.).
- Authors
Kombiah, P.; Sahayaraj, K.
- Abstract
Botanical pesticides have pesticidal or ovicidal or ovipositional or antifeedant or repellent activities. The development of resistance to existing conventional synthetic pesticides and the increasing public concern over environmental pollution and health hazards created by synthetic pesticides, generate a great need for new types of pest management agent's advantage with higher activity against the target pests, and lower impact on humans and environmental quality. By keeping this idea in our mind, experiments were carried out to formulate and to determine the repellency of thallus extract and emulsifiable concentrations (EC) of Caulerpa scalpelliformis (R.Br.) Web. V. Bosse against third stadium Spodoptera litura larvae and Dysdercus cingulatus nymphs by Yshape olfactometer. Obtained results indicated that the formulated sea weed extract showed more repellent property than crude extract in dose dependent manner. Crude chloroform extract highly repel S. litura (API = -1.00 at 150 min after exposure) than D. cingulatus (API = -1.00 at 180 min after exposure) than methanol and hexane extract of C. scalpelliformis. All the prepared EC formulations (EC 0.2, 0.4, 0.6, 0.8 and 1.0%) having good physically stable and were highly effective against S. litura and D. cingulatus respectively. Hence, C. scalpelliformis -based formulation can be utilized for the management of agricultural pests like S. litura and D. cingulatus.
- Subjects
CAULERPA; SPODOPTERA littoralis; DYSDERCUS; PLANT extracts; PESTICIDAL plants; PESTICIDE formulation
- Publication
Journal of Biopesticides, 2012, Vol 5, Issue Sup, p145
- ISSN
0974-391X
- Publication type
Article