The toxicity ofthree concentrations (10%, 15% and 20% w/v) and foliar spraying schedules ofplant extracts from Azadiracta indica (Meliaceae), neem kernel and Vitexnegundo (Verbenaceae), Aloe vera (Asphodelacea) Gloriosa superba (Colchicaceae),Chrysanthimum cinearifolium (Asteraceae) and Ocimum tenuiflorum (Lamiaceae)for managing a major leaf pest of Curcuma longa, was investigated. Theinsect pest was Panchaetothrips indicus Bagnall (Thysanoptera :Thripidae) which causes the folding of leaves and affects the yield of itsrhizome. Two concentrations of extracts which proved efficacy in lab studieswere tried upon P.indicus in field in two seasons. Higher concentrations(20% w/v) and a combination of neem seed kernel and Vitex negundo leafextracts significantly (P < 0.05) reduced the number of the insect pest comparedto the untreated control in both years. Leaf damage was significantly reducedand rhizome yield increased compared to untreated plants.
How to cite this article:
Arutselvi, R*., Ponmurugan,P., Bala Saravanan, T. and Suresh, R. 2012. Formulation ofnatural insecticides against Panchaetothripsindicus Bagnall in Curcuma longaL. leaves of PTS and Erode varieties. Journalof Biopesticides, 5(0): 77-81.
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