The impact ofleaf and flower extracts of Calendula officinalis on total protein andtotal carbohydrate contents of the hemolymph, midgut and midgut content of Spodopteralitura larvae were studied. Among the leaf and flower extracts tested inthe hemolymph, the highest reduction in protein content of the larvae wascaused by chloroform leaf and benzene flower extracts whereas in the midgut,chloroform leaf and petroleum ether flower extracts reduced the protein to themaximum. Aqueous leaf and flower extracts had least activity in both hemolymph andmidgut. However, in the midgut content, methanol leaf and chloroform flowershowed maximum reduction in protein content and petroleum ether leaf andmethanol flower showed least reduction. Total carbohydrate content was reducedby chloroform leaf, and petroleum ether flower extracts in hemolymph with leastreduction in benzene leaf and flower extracts treated larvae. In the midgut,chloroform leaf and flower extract caused maximum reduction whereas in themidgut content, methanol leaf and petroleum ether flower extracts showed reductionin carbohydrate content, while aqueous leaf and flower extracts showed anincrease in carbohydrate content in midgut content contrary to midgut. However,when compared to control, the protein and carbohydrate content were reduced inall the tissues of treated larvae irrespective of the extracts tested. Theseresults suggest that Calendula extracts affect the nutritional status ofSpodoptera litura larvae.
How to cite this article:
Medhini, N., Divakar,Y. G. and Manjulakumari, D*. 2012. Effect of Calendula officinalis extracts on thenutrient components of different tissues of tobacco cutworm, Spodoptera litura Fabricius. Journal of Biopesticides, 5(0): 139-144.
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