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Sampling Procedure and Temporal-Spatial Distribution of the Cabbage Aphid, Brevicoryne brassicae L. (Hemiptera: Aphididae), on Canola
2014
J. Agr. Sci. Tech
unpublished
To estimate population density of the cabbage aphid, Brevicoryne brassicae (L.), a stratified random sampling was conducted in two unsprayed canola fields in Isfahan (central Iran) during 2011-2012. Population density was determined for apterous, and alates, as well as the total population, at two plant growth phases (PGP1: From plant emergence to the end of rosette, and PGP2: From the beginning of stem elongation to ripening) on the whole plant as the sampling unit. Sources of variation in the
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