Zhang X-M, Yang N-W, Wan F-H,
Lövei GL (2014): Density and seasonal dynamics of Bemisia tabaci (Gennadius) Mediterranean on common crops
and weeds around cotton fields in Northern China. Journal of Integrative Agriculture 13: 2211-2220. DOI:10.1016/S2095-3119(13)60613-9
Abstract
BACKGROUND:
The two common whitefly species, Bemisia tabaci (Gennadius) MEAM1 and Trialeurodes
vaporariorum (Westwood) often co-occur on their host plants. We examined
the effect of host plant occupation by one species on later arriving
conspecific individuals or on the other competing species.
RESULTS: Resource
pre-occupied by T. vaporariorum had mostly negative effects on the life
history parameters of later-arriving conspecifics. Red-eyed nymph and immature
survival of T. vaporariorum decreased when resource was pre-occupied by
conspecifics, irrespective of the previous occupation scenario. However,
resource pre-occupied by T. vaporariorum had only minor detrimental
effects on the performance of later-arriving B. tabaci MEAM1. In the opposite
colonization sequence, previous occupation by B. tabaci MEAM1 had no
significant effects on life history parameters of later-arriving conspecifics,
but severe detrimental effects were observed on the performance of
later-arriving T. vaporariorum. Total immature survival of T.
vaporariorum decreased in both weak and strong previous occupation
situations by B. tabaci MEAM1.
CONCLUSION: The interspecific
interactions between B. tabaci MEAM1 and T. vaporariorum were
asymmetric, with B. tabaci MEAM1 being the superior competitor. This superiority
could partially explain the rapid spread of B. tabaci MEAM1 in China
Keywords
Bemisia tabaci, cryptic species, MEAM1,
asymmetric competition, interspecific interaction, resource previous
occupation, Trialeurodes vaporariorum
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