Efficacy of organic products as repellents and feeding deterrents against hadda beetle, Henosepilachna vigintioctopunctata (Coleoptera: Coccinellidae) (Fabricius)

Abstract

The study was conducted on hadda beetle, Henosepilachna vigintioctopunctata, to find out the repellent and antifeedant activity of certain organic products viz., Dashparni, Panchgavya, Darekastra, Agniastra, Brahmastra, Cow urine, Tamralassi, Fermented butter milk and biopesticide (Neem baan 1500 ppm) by leaf dip method of bioassay against second instar grubs of H. vigintioctopunctata in laboratory conditions. Among the organic products, Neem baan showed maximum repellent and antifeedant activity followed by Dashparni. Per cent repellence varied from 7.50 to 79.25 per cent after two hours in different organic products, whereas antifeedance after 24 hours varied from 8.69 to 71.49 per cent (based on the per cent leaf area consumed). Per cent repellence and antifeedance shown by different organic products in decreasing order: Neem Baan > Dashparni > Panchgavya > Darekastra > Agniastra > Brahmastra > Cow urine > Tamralassi > Fermented butter milk.