Arthropod-Plant Interactions (2018) 12, 291-301

Amene Karami, Yaghoub Fathipour, Ali Asghar Talebi and Gadi V.P. Reddy (2018)
Canola quality affects second (Brevicoryne brassicae) and third (Diaeretiella rapae) trophic levels
Arthropod-Plant Interactions 12 (2), 291-301
Abstract: Biological control agents can be used as a complementary control measure that can be combined with resistant host plants to control pests. In this study, the effects of different canola cultivars (Karaj-1, Karaj-2, Karaj-3, Licord, Okapi, Opera, RGS₀₀₃, Sarigol, Talaye and Zarfam) on the performance and life table parameters of the cabbage aphid, Brevicoryne brassicae, and its parasitoid, Diaeretiella rapae, were determined under laboratory conditions. Total fecundity of the cabbage aphid differed with cultivar, with the highest value (59.41 nymphs per female) of this parameter observed on Opera and the lowest (1.67) observed on RGS₀₀₃. The highest and lowest intrinsic rates of increase (r) of the cabbage aphid were observed on Opera (0.331 day^-1) and RGS₀₀₃ (- 0.242 day^-1) cultivars, respectively, suggesting these to be the most susceptible and most resistant cultivars to this pest. However, because the aphid did not settle and feed well on RGS₀₀₃, it was not possible to determine demographic parameters for its parasitoid. Consequently, the Okapi cultivar, which was the most resistant cultivar to the cabbage aphid after RGS₀₀₃, was used in this study to assess the parasitoid wasp. The parasitoid's intrinsic rate of increase (r) varied from 0.426 day^-1 on the susceptible cultivar (Opera) to 0.341 day^-1 on the resistant canola cultivar Okapi. Aphid performance decreased 93% on the resistant canola cultivar, while parasitoid performance decreased only 20% on the resistant cultivar compared to more susceptible cultivar.
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Link to article at publishers website
Database assignments for author(s): Yaghoub Fathipour, Ali Asghar Talebi, Gadi V. P. Reddy

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
general biology - morphology - evolution
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Brevicoryne brassicae	Rape/canola (Brassica napus)
Diaeretiella rapae (parasitoid)	Brevicoryne brassicae