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Journal of Entomology and Zoology Studies
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ISSN Print: 2349-6800 | ISSN Online: 2320-7078

Journal of Entomology and Zoology Studies

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2015, Vol. 3, Issue 6
A study on Losses due to Brevicoryne brassicae in different Brassica genotypes under screen house conditions

Imtiaz Ali Khan, Mansoor Ahmad, Rasheed Akbar, Sajjad Hussain, Muhammad Saeed, Abid Farid, Ruidar Ali Shah, Walija Fayaz, Bismillah Shah, Mir Manzar Ud Din

A study on losses due to Brevicoryne brassicae in 12 Brassica genotypes under screen house conditions was conducted under screen house conditions during 2006-08. For the experiments artificialrninfestation of 5, 10 and 15 aphids/plant at flower-bud initiation stage was done in all the 12 genotypes. The results of the experiment of 5 aphids/plant infestation revealed that aphid density was significantly higher (106.2 aphidrnplant-1) on Rainbow and lower (27.67 aphid plant-1) on Raya Anmol and Peela Raya (30.17 aphid plant-1). In the experiment of 10 aphids plant-1 infestation, mean density of aphid was significantly higher on Legend (125.7 aphids plant-1) and Westar (117.0 aphids plant-1) while lower on Raya Anmol (57.67 aphids plant-1) and T-16-401 (54.50 aphids plant-1). In the experiment of 15 aphids aphids plant-1, mean aphid density was significantly higher (200.70 aphids plant-1) on Rainbow and lower (82.83 aphids plant-1)rnon Ganyou-5. In control (0 aphids aphids plant-1), Raya Anmol yielded significantly higher (7.32, 7.33 and 7.33 g plant-1) and Oscar lower (3.62, 3.62 and 3.60 g plant-1) in the 5, 10 and 15 aphids plant-1, respectively. Among the 5, 10 and 15 aphid infested plants, Ganyou-5 (4.98, 4.57, 3.45 g plant-1) yielded significantly higher and while Oscar (2.55, 1.60, 1.22) lower, respectively. The percent yield losses were significantly higher in Crusher (43.83%) and Torch (44.50%) and lower (11.08%) in T-16-401 in 5 aphid infested plant; significantly higher (62.15%) in Vanguard and lower in Legend (23.65%) and T-16-401 (22.09%) in 10 aphid/plant, and significantlyrnhigher (75.88%) in Vanguard and lower (29.14%) in T-16-401. The present results might be helpful in using host plant resistance in an integrated pest management program against B. brassicae on Brassica genotypes.
Pages : 16-19 | 586 Views | 39 Downloads
How to cite this article:
Imtiaz Ali Khan, Mansoor Ahmad, Rasheed Akbar, Sajjad Hussain, Muhammad Saeed, Abid Farid, Ruidar Ali Shah, Walija Fayaz, Bismillah Shah, Mir Manzar Ud Din. A study on Losses due to Brevicoryne brassicae in different Brassica genotypes under screen house conditions. 2015; 3(6): 16-19.
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