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Year: 2015, Issue: December

Ecofriendly use of Chromolaena odorata, Spilanthes paniculata and Tagetes minuta extracts as antifeedant against Diamondback moth, Plutella xylostella (L.) on mutard.
B. S. Chandel and Manish Kumar
Plant extracts, Diamondback moth, DBM and Mustard, B.juncea ver. varuna
Experiments were conducted to test the antifeeding properties of selected ten indigenous plant extracts against 24 hr. starved 3rd instars larvae of P.xylostella under laboratory conditions. Ten indigenous asteraceous plant extracts viz., Chrysanthemum cinerariaefolium (trev.) Vis., Chromolaena odorata Linn. Cichorium intybus Linn., Inula racemosa Hook. f, Reichardia tingitana Linn. Roth, Rhaponticum acaule (L.) DC., Scorzonera undulata Vahl., Spilanthes paniculata Well ex DC, Mantisalca duriaeri (Spach) Birq. Et Cavill. and Tagetes minuta L. against the diamondback moth, Plutella xylostella Linn. (Lepidooptera : Noctuidae) along with control (benzene + emulsified water) to find out their comparative antifeeding efficacy under laboratory. It is evident from the data that on the basis of their EC values all plant extract showed significant promising protection power (showing values less than 0.50) to 50 larvae of P.xylostella. After 24 h the C.odorata extract was found to be the most effective treatment with minimum EC 50 values (0.011) followed by S.paniculata extract and R.acaule treatments with minimum EC values was 0.013 and 50 0.156, respectively. The sequence of protection power under laboratory conditions can be arranged in the following descending order on the basis of their respective EC values i.e. C.odorata > S.paniculata > T.minuta > S.undulata > 50 I.racemosa > R.acaule > R.tingitana > C.cinerariaefolium > C.intybus > M.duriaei, respectively. 0.011 > 0.013 > 0.0.018 > 0.156 > 0.164 > 0.212 > 0.288 > 0.295 > 0.392 > 0.416 times protective, respectively as M.duriaei taken as unit.

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