Assessment of avoidable yield losses due to insect pests in castor (Ricinus communis L.)
ASSESSMENT OF AVOIDABLE YIELD LOSSES DUE TO INSECT PESTS IN CASTOR
Keywords:Avoidable yield loss, Castor, Cultivars, Insect pests, Pest succession
Field experiments were carried out to evaluate the avoidable yield losses caused by insect pests on three castor cultivars (DCH-519, DCH-177 and 48-1) during kharif and rabi seasons of 2012-13 and 2013-14. Semilooper, tobacco caterpillar, hairy caterpillar, capsule borer and leafhopper were recorded as major pests. However, the pest succession varied with the season. The results revealed that significantly lower infestation of insect pests was observed in protected plots over unprotected plots. Higher mean seed yield of 1996 kg/ha and 1596 kg/ha was recorded from protected plots, while seed yield of 1421 kg/ha and 750 kg/ha was recorded from unprotected plots during kharif 2012-13 and 2013-14, respectively. During rabi season, higher mean seed yield of 1050 kg/ha and 927 kg/ha was recorded in protected plots, while unprotected plots recorded seed yield of 542 kg/ha and 375 kg/ha during 2012-13 and 2013-14, respectively. The mean avoidable yield losses due to insect pests on castor cultivars ranged from 17.2 to 63.3 per cent during kharif season, while the loss was higher (22.5 to 89.4%) during rabi season. Among the cultivars, DCH-519 revealed minimum avoidable yield losses due to insect pests in both kharif and rabi seasons.
Anonymous 1991. Annual Report 1990-91. All India Coordinated Research Project on Castor, Directorate of Oilseeds Research,
Anonymous 1992. Annual Report 1991-92. All India Coordinated Research Project on Castor, Directorate of Oilseeds Research,
Anonymous 2006. Research Achievements in Castor. All India Coordinated Research Project on Castor, Directorate of Oilseeds Research, Hyderabad.
Basappa H 2007. Validation of integrated pest management modules for castor (Ricinus communis) in Andhra Pradesh. Indian Journal of Agricultural Sciences, 77(6): 357-362.
Duraimurugan P and Tyagi K 2014. Pest spectra, succession and its yield losses in mungbean and urdbean under changing climatic scenario. Legume Research, 37(2): 212-222. DOI: https://doi.org/10.5958/j.0976-0571.37.2.032
Kooner B S, Cheema H K and Kaur R 2006. Insect pests and their management. In: Advances in Mungbean and Urdbean. pp. 335-401. Ali M and Shivkumar (Eds.), Indian Institute of Pulses Research, Kanpur.
Lakshminarayana M, Duraimurugan P and Vimala Devi P S 2013. Efficacy of microbial and botanical formulations for the management of lepidopteran pests infesting castor. In: Proceedings of Fourth Biopesticide International Conference, 28-30 November 2013 at St. Xavier's College, Palayamkottai, Tamil Nadu, India. pp.248-249.
Lakshminarayana M 2005. Studies on antixenosis in castor, Ricinus communis L. against major insect pests. Indian Journal of Plant Protection, 33(2): 216-219.
Lakshminarayana M and Raoof M A 2005. Insect Pests and Diseases of Castor and Their Management. Directorate of Oilseeds Research, Hyderabad. pp.78.
Lakshminarayanamma V, Reddy D K and Reddy A V 2013. Management of lepidopteran pests through newer insecticides in castor. Indian Journal of Plant Protection, 41: 25-29.
Rao M S, Rama Rao C A, Srinivas K, Pratibha G, Vidya Sekhar S M, Sree Vani G and Venkatswarlu B 2012. Intercropping for
management of insect pests of castor, Ricinus communis in the semi-arid tropics of India. Journal of Insect Science, 12: 1-10. DOI: https://doi.org/10.1673/031.012.1401