ArticlePest management science2025
Evaluating antibiosis resistance to cabbage aphid (Brevicoryne brassicae L., 1758) in vegetable brassicas (Brassica oleracea L.) and related C-genome brassica species.
Article in Pest management science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundNineteen Brassica accessions from four C-genome species were screened under controlled environment conditions for their effects on the development of the cabbage aphid, Brevicoryne brassicae. The aim was to identify accessions with antibiosis host plant resistance (HPR) to B. brassicae. Candidate Brassica accessions were selected because of (i) upregulation of transcription factors gene orthologues acting within the jasmonic acid signalling pathway, or (ii) having been reported in the 1990s as partially resistant to cabbage aphid. Accessions were evaluated by placing three 1-day-old aphid nymphs on six true leaf stage plants and recording the aphid population size 14 days later.
resultsThere was significant (GLM, P < 0.05) variation in aphid population size between the accessions. Aphid populations on the most resistant accessions were approximately one third the size of those on the most susceptible accessions. Two accessions (B. cretica, B. villosa) supported significantly fewer aphids compared to a commercial variety of B. oleracea used as a reference control. Eight accessions (including B. cretica, B. oleracea and B. villosa) were selected for further study of varietal effects upon aphid biology. Significant differences in B. brassicae reproduction, intrinsic rate of increase, and population doubling time were identified between these eight accessions.
conclusionLinear regression analysis identified that HPR was explained mainly by varietal effects on aphid pre-reproductive period, which accounted for 53.9% of the variation in population development resistance screening results. Partial HPR could be a valuable trait for plant breeding to limit aphid population development as part of an integrated pest management strategy. © 2025 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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