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Population Trend of Canola Aphid, Lipaphis Erysimi (Kalt.) (Homoptera: Aphididae) and its Associated Natural Enemies in Different Brassica Lines along with the Effect of Gamma Radiation on Their Population
Abstract:Studies regarding the determination of population trend of Lipaphis erysimi (kalt.) and its associated natural enemies in different Brassica lines along with the effect of gamma radiation on their population were conducted at Agricultural Research Farm, Malakandher, Khyber Pakhtunkhwa Agricultural University Peshawar during spring 2006. Three different Brassica lines F6B3, F6B6 and F6B7 were used, which were replicated four times in Randomized Complete Block Design. The data revealed that aphid infestation invariably stated in all three varieties during last week of February 2006 (1st observation). The peak population of 4.39 aphids leaf-1 was s recorded during 2nd week of March and lowest population of 1.02 aphids leaf-1 was recorded during 5th week of March. The species of lady bird beetle (Coccinella septempunctata) and Syrphid fly (Syrphus balteatus) first appeared on 24th February with a mean number of 0.40 lady bird beetle leaf-1 and 0.87 Syrphid fly leaf-1, respectively. At the time when aphid population started to increase the peak population of C. septempunctata (0.70 lady bird beetle leaf- 1) and S. balteatus (1.04 syrphid fly leaf-1) was recorded on the 2nd week of March. Chrysoperla carnea appeared in the 1st week of March and their peak population was recorded during the 3rd week of March with mean population of 1.46 C. carnea leaf-1. Among all the Brassica lines, F6B7 showed comparatively more resistance as compared to F6B3 F6B6. F6B3 showed least resistance against L. erysimi, which was found to be the most susceptible cultivar. F6B7 was also found superior in terms of natural enemies. Maximum number of all natural enemies was recorded on this variety followed by F6B6. Lowest number of natural enemies was recorded in F6B3. No significant effect was recorded for the effect of gamma radiation on the population of aphids, natural enemies and on the varieties.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1330979Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1201
 Agarwala, R., K. Amrender, Y. P. Singh, S. A. Khan, L.M. Bhar, N. V. K. Chakravarthy and A. Srivastava. 2005. Forecasting of L. erysimi on oilseed Brassica in Indian. J. Crop Protection. 24(12): 1042-1053.
 Agarwala, B. K. and P. Bardhanroy. 1999. Numerical response of lady beetle (Coleoptera: Coccinellidae) to aphid prey (Hom: Aphididae) in the field bean in northeast India. J. Appl. Entomol. 17:303-309.
 Bedford, J.W. and A.Henry.1998.Yield losses in important cultivars of canola and effect of Aphid infestation under favorable environmental condition. Indian. J. Entomol. 52:541-546.
 Charlet, L.D., D. Olson, and P.A. Glogoza. 2002. Biological control of insect and weed pest in North Dakota Agriculture. North Dakota State University, Extension Service, Frago, North Dakota 58105. p.4-10.
 MINFAL. 2006. Ministry for Food, Agriculture and Livestock. Agricultural Statistics of Pakistan 2006-2007. Government of Pakistan, Islamabad.
 Rana, J. S. 2005. Performance of L. erysimi (Homoptera: Aphididae) on different Brassica species in a tropical environment. J. Pest Sci. 78(3): 155-160.
 Singh, C.P. and G.C. Sachan. 1999. Population build up of C. septempunctata and its synchronization with L. erysimi. Department of Entomology, College of Agriculture, G.B. Pant University of Agriculture & Technology, Pantnagar. 18 (1): 25-30.
 Sirimachan, N., O. Kern-asa, W. Amornsak, and W. Suasa-ard. 2005. Biological study and efficiency of the green lacewing, Mallada basalis (Walker) (Neuroptera: Chrysopidae) as biological control agent of Aphis craccivora Koch (Homoptera: Aphididae). National Bio Control Res Center. Proceedings of 43rd Kasetsart University Annual Conference, Thailand, 1-4 February.
 Steels, R.G. and J. H. Torrie. 1960. Principles Procedures of Statistics. McGraw Hill, New York. pp. 481.
 Weibull, J. and G. Melin. 2003. Yield losses due to mustard aphid, L. erysimi in some Brassica species. Annals of applied Biology. 125: 417-423.