Journal
PLANT PROTECTION SCIENCE
Volume 57, Issue 1, Pages 59-65Publisher
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/132/2019-PPS
Keywords
Brassica napus; Brevicoryne brassicae; intercropping; parasitism; predators; species diversity
Categories
Funding
- University of Mohaghegh Ardabili in Iran [1852]
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Intercropping canola with faba beans, field peas, or garlic can potentially decrease the density of cabbage aphids and increase canola yields. However, only the intercrop of canola with faba beans showed a significant increase in predator diversity and parasitism rate compared to monoculture.
The impacts of intercropping of canola (Ca) with faba beans (Fb), field peas (Fp), garlic (G), or wheat (Wh) were evaluated on the cabbage aphid, Brevicoryne brassicae (Linnaeus, 1758), natural enemies and canola yields in row ratios of 3Ca : 3Fb, 3Ca : Fp, 3Ca : 3G, and 3Ca : 3Wh in 2018 and 2019. In both years, the lowest aphid population was recorded in 3Ca : 3G. In 2018, the aphid population was significantly (P < 0.05) lower in 3Ca : 3Fp than in the monoculture, while, in 2019, it was lower in the intercrops compared to the monoculture. Furthermore, none of the intercrops, except 3Ca : 3Fb, showed a significant increase in the predator diversity and parasitism rate. The dry seed weight loss was higher in the monoculture and 3Ca : 3Wh than in the other intercrops. Based upon the obtained results, decreasing the density of the cabbage aphid and increasing the canola yield by intercropping canola with the faba bean, the field pea or garlic is possible with this system. The inferences of these outcomes, which are associated with the integrated pest management (IPM) in canola cropping systems, are discussed.
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