Prospects of biorationals to control Maruca vitrata (geyer) in pigeonpea and yieldinfestation relationship
DOI:
https://doi.org/10.59797/jfl.v27i1.839Keywords:
Beauveria bassiana, Bt, Metarhizium anisopliae, Neem oil, Pod damage, Seed damage, SpinosadAbstract
Maruca vitrata is an important pest of pigeonpea and other legumes in India. A number of biorationals have shown good promise against the pest. The present study was conducted to evaluate the potential of ecofriendly products like Dipel (Bt), Neem oil 3%, Metarhizium anisopliae 2x108 CFU/ml, Beauveria bassiana 1x109CFU/ml, Spinosad 45% SC in comparison with Chlorpyriphos 20EC to manage the spotted borer, when applied as foliar sprays. Pooled data of two years revealed that Bt and Spinosad were highly effective recording least pod damage (5.1%), least seed damage (4.3-4.5%), highest yield (1235-1237 kgha-1) and most profitable benefit : cost ratio (3.2). Neem oil and Metarhizi um fared ne xt better. B. Bassiana and Chlorpyriphos though were better than the control, were inferior to the other treatments. Correlation and regression studies on the extent of pod and seed damage on yield indicated that pod damage and seed damage were significantly but negatively correlated with yield. Regression equation was fitted and discussed.
References
Barroga SF. 1969. Control of Lepidopterous pests attacking bush bean, Phaseolus vulgaris L. blossoms and pods. Philippines Journal of Plant Industries 34 : 159-162.
Dahiya SS, Chauhan YS, Johansen C and Shanower TG. 1999. Adjusting Pigeonpea Sowing Time to Manage Pod Borer Infestation. International Chickpea and Pigeonpea Newsletter 6 : 44-45.
Mohapatra SD and Srivastava CP. 2002. Bioefficacy of chemical and biorational insecticides against incidence of legume pod borer, Maruca vitrata (Geyer) in short duration pigeonpea. Indian Journal of Plant Protection 30 : 22-25.
Mohapatra SD and Srivastava CP. 2008. Toxicity of biorational insecticides against spotted pod borer, Maruca vitrata (Geyer) in short duration pigeon pea. Indian Journal of Entomology 70 : 61 -63.
Narendra Reddy C, Yeshbir Singh, Dureja P and Vijai S Singh. 2001. Effect of time of spray on pod borer management in pigeonpea. Indian Journal of Entomology 63 : 130-136
Rao GVR, Kumari PRA, Rao VR and Reddy YVR. 2007. Evaluation of Spinosad and Indoxacarb for the management of legume pod borer, Maruca vitrata (Geyer) in pigeonpea. Journal of Food Legumes. 20: 126-127.
Sahoo BK and Senapathi B. 2000. Natural enemies of pod borers in pigeonpea. International Chickpea and Pigeonpea Newsletter 7:57-59.
Saxena HP. 1974. Severe and widespread occurrence of Maruca testulalis (Geyer) in red gram, Cajanus cajan. Entomology News 4 : 21
Sunil Kumar, Singh B and Akhauri RH. 2004.Efficacy of some biorational insecticides on larval population of gram pod borer on pigeonpea. Legume Research, 27: 62-65.
