The green peach aphid,
Myzus persicae (Sulzer) (Hemiptera: Aphididae), is an important insect pest of a canola crop
Brassica napus L., in Ardabil, Iran. Host plant resistance is an essential component of the integrated management of
M. persicae. In field experiments, the population density of
M. persicae was higher on Zarfam and lower on Ebonite, Elite, Okapi, RGS003, and
Opera
among the 19 canola cultivars during 2008 and 2009. In a free-choice situation, the numbers of attracted aphids per plant was lowest on
Opera
(1.2). In the life table study, aphids reared on
Opera
had the shortest adult longevity (8.3 days), lowest numbers of progeny per female (15.4) and the lowest survival rate (62.5%) compared to the other five cultivars. The intrinsic rate of the natural increase (
rm) and population growth rate (λ) were lowest on
Opera
and highest on Zarfam. The generation time (
T) was shortest on
Opera
(11.7 d) and longest on RGS003 (13.1 d), whereas the doubling time (DT) was longest on
Opera
(3.58 d) and shortest on Zarfam (2.26 d). Our results clearly suggest that
Opera
was the highest resistant host among the tested cultivars and has the potential to be used in the integrated management of
M. persicae.
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