| Abstrakt: |
The present experiments were carried out to study the effect of Subhash Palekar’s Natural Formulations (SPNF’s) viz. Agniastra, Neemastra, Dashparni and Jivamrit in comparison to other natural formulations such as Panchgavya, Desi cow urine and Buffalo urine on feeding preference/deterrence and feeding inhibition (Antifeedant activity) of spotted pod borer, Maruca vitrata (Fabricius) under laboratory conditions at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. In feeding preference/choice test, all the tested Subhash Palekar’snatural formulations were found very effective to deter the M. vitrata larvae. Agniastra showed the highest feeding deterrence activity with the least feeding preference/orientation of M. vitrata larvae (0.08) towards the treated flower buds of pigeon pea followed by dashparni (0.16), neemastra (0.24) and jivamrit (1.16) with significantly highest feeding preference /orientation of M. vitrata larvae towards untreated control (5.67) after 48h of exposure in choice test. On the other hand, under no-choice bioassay technique, antifeedant activity of tested natural formulations was observed and on the basis of values of preference index calculated, agniastra, neemastra, dashparni and desi cow urine were categorized under strong antifeedants with values 0.33, 0.34, 0.40 and 0.46 respectively, against M. vitrata. Whereas, panchagavya was categorized as moderate antifeedant with preference index value 0.68 and jivamrit and buffalo urine were classified as slightly antifeedant with values 0.87 and 0.78, respectively. Thus, this preliminary bioassay study clearly revealed the feeding deterrent and strong antifeedant activity of three SPNF’s i.e. agniastra, neemastra and dashparni and slight antifeedant activity of jivamrit against M. vitrata. Being a preliminary and novel approach of using these eco-friendly, cost effective, easily homemade natural formulations against M. vitrata, further in-depth studies are essentially required to come to the final conclusions regarding their better use and incorporation in management practices of this major and devastating insect pest of pigeon pea. [ABSTRACT FROM AUTHOR] |
