TY - JOUR
T1 - Tri-Trophic Interactions of Cabbage Cultivars, a Generalist Aphid, Myzus persicae (Sulzer) and the Braconid Diaeretiella rapae McIntosh
AU - Shanker, Chitra
AU - Rizvi, Syed Z.M.
AU - Liu, Jian
AU - Johnson, Anne C.
AU - Gurr, Geoff
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH. Published by John Wiley & Sons Ltd.
PY - 2024/11
Y1 - 2024/11
N2 - The tri-trophic interactions among five cabbage (Brassica oleracea var. capitata) cultivars—Copenhagen Market (CM), Red Acre (RA), Vertus Savoy (VS), Sugarloaf (SL) and Danish Ballhead (DBH)—a generalist aphid, Myzus persicae (Sulzer) and its parasitoid, Diaeretiella rapae McIntosh, were assessed. Copenhagen Market, known for its reported aphid resistance, recorded the fewest aphids (9.11 per plant; F = 6.50; df = 4, p < 0.01), followed closely by Red Acre (11.83 per plant), which was statistically similar. Upon aphid attack, all cultivars produced plant volatiles that influenced the attraction of the parasitoid, D. rapae. Copenhagen Market consistently showed a higher response across cultivar combinations, attracting 62.59%–67.50% of parasitoids. It also recorded a higher parasitisation rate (39.9%; F = 5.94; df = 4/20, p < 0.01) in a multiple-choice test. The results indicate that cabbage cultivars employ both constitutive and induced resistance, as aphid-resistant cultivars were also found to be more attractive to parasitoids. In addition to plant odour cues, factors such as plant colour, texture and host aphid kairomones can influence the orientation and parasitisation by D. rapae.
AB - The tri-trophic interactions among five cabbage (Brassica oleracea var. capitata) cultivars—Copenhagen Market (CM), Red Acre (RA), Vertus Savoy (VS), Sugarloaf (SL) and Danish Ballhead (DBH)—a generalist aphid, Myzus persicae (Sulzer) and its parasitoid, Diaeretiella rapae McIntosh, were assessed. Copenhagen Market, known for its reported aphid resistance, recorded the fewest aphids (9.11 per plant; F = 6.50; df = 4, p < 0.01), followed closely by Red Acre (11.83 per plant), which was statistically similar. Upon aphid attack, all cultivars produced plant volatiles that influenced the attraction of the parasitoid, D. rapae. Copenhagen Market consistently showed a higher response across cultivar combinations, attracting 62.59%–67.50% of parasitoids. It also recorded a higher parasitisation rate (39.9%; F = 5.94; df = 4/20, p < 0.01) in a multiple-choice test. The results indicate that cabbage cultivars employ both constitutive and induced resistance, as aphid-resistant cultivars were also found to be more attractive to parasitoids. In addition to plant odour cues, factors such as plant colour, texture and host aphid kairomones can influence the orientation and parasitisation by D. rapae.
KW - brassica
KW - Diaeretiella rapae
KW - Myzus persicae
KW - olfactometer
KW - plant defence
KW - tritrophic interactions
UR - http://www.scopus.com/inward/record.url?scp=85209128726&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85209128726&partnerID=8YFLogxK
U2 - 10.1111/jen.13375
DO - 10.1111/jen.13375
M3 - Article
AN - SCOPUS:85209128726
SN - 0931-2048
JO - Journal of Applied Entomology
JF - Journal of Applied Entomology
ER -