Rama Rao, C.VSANDEEP, R.S.2016-08-202016-08-202005http://krishikosh.egranth.ac.in/handle/1/73121The present investigations were undertaken to study the biology of Caryedon serratus (Olivier) on groundnut pods and the relative efficacy of some plant products under laboratory conditions at Post Harvest Technology Center, Agricultural College, Bapatla during the year 2004-2005. The Pre-oviposition and oviposition periods of C. serratus ranged from 1.04 to 2.41 days and 3 to 16 days, respectively. The egg, larval and pupal periods ranged from 3 to 9, 19 to 38, 9 to 34 days with an average of 6.25, 31.21, 26.55 days, respectively. The fecundity of female ranged from 15 to 85 eggs with an average of 35.44 eggs/female. The adult longevity and total life cycle ranged from 19 to 30 and 43 to 70 days with an average of 19.62 and 57.16 days, respectively. The average length of egg, larva, pupa and adult was 1.00 mm, 7.28 mm, 6.93 mm and 6.22 mm, respectively, whereas the average breadth of the respective life stages was 0.71 mm, 2.61 mm, 2.80 mm and 2.81 mm, respectively. The study on relative efficacy of some grain protectants i.e. neem kernel powder, Acorus calamus rhizome powder, karanja seed powder Lantana camara leaf powder, Ocimum canum leaf powder and eucalyptus leaf powder each at 1% concentration (mixed with groundnut pods), neem oil, karanja oil, mustard oil, castor oil, sesamum oil and citronella oil each at 1% concentration (gunny bag treatment) and proven check deltamethrin @ 0.02% concentration revealed that A. calamus rhizome powder was effective in controlling oviposition and pod damage by C. serratus upto 150 and 180 days, respectively. The L. camara leaf powder was effective upto 30 and 120 days after treatment in restricting oviposition and pod damage, respectively. The O. canum leaf powder recorded 25.94 and 26.30 per cent pods with eggs and pod damage, respectively and gave protection upto 120 days after treatment. Karanja seed powder controlled oviposition upto 30 days and pod damage upto 90 days where as neem kernel powder recorded 76.23 and 63.48 per cent pods with eggs and pod damage, respectively at 180 days after treatment. The least effective was eucalyptus leaf powder. Among the oils tested by treating the gunny bags, neem oil and castor oil protected groundnut pods upto 180 days after treatment with zero per cent pods with eggs and zero per cent pod damage by C. serratus. Citronella oil provided protection against oviposition upto 120 days and controlled pod damage upto 150 days after treatment. It was followed by Karanja oil and the least effective was sesamum oil. Deltamethrin a proven check controlled oviposition and pod damage by C. serratus upto 180 days after treatment. Besides, this the plant products and plant oils did not affect the germination of groundnut kernels.enBiology and management of groundnut pod borer Caryedon serratus (Olivier) in groundnut podsThesis