Journal of Plant Protection Research (2011) 51, 38-43

Jagdev Singh Kular and Sarwan Kumar (2011)
Quantification of avoidable yield losses in oilseed Brassica caused by insect pests
Journal of Plant Protection Research 51 (1), 38-43
Abstract: A six year field study was conducted from 2001-2002 to 2006-2007 at Punjab Agricultural University, Ludhiana, India to study the losses in seed yield of different Brassica species (B. juncea, B. napus, B. carinata, B. rapa and Eruca sativa) by the infestation of insect pests. The experiment was conducted intwo different sets viz. protected/sprayed and unprotected, in a randomized block design, with three replications. Data on the infestation of insect pests,and seed yield were recorded at weekly intervals and at harvest, respectively.The loss in seed yield, due to mustard aphid and cabbage caterpillar, varied from 6.5 to 26.4 per cent. E. sativa suffered the least loss in seed yield and harboured the minimum population of mustard aphid (2.1 aphids/plant) and cabbage caterpillar (2.4 larvae/plant). On the other hand, B. carinata was highly susceptible to the cabbage caterpillar (26.2 larvae/plant) and suffered the maximum yield loss (26.4%).
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Research topic(s) for pests/diseases/weeds:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lipaphis erysimi	Brassica - other species	India
	Lipaphis erysimi	Rocket (Eruca)	India
	Pieris brassicae	Brassica - other species	India
	Pieris brassicae	Rocket (Eruca)	India