Abstract:
Eleven genotypes of wheat viz. V-05066, V-5BT-006, V-04178, V-04022, V-05003, V-05082, Seher-06, Inqalab-91, Chakwal-5C-011, V-033010 and V-032862 were sown in the field area of Entomological Research Institute, AARI, Faisalabad, Pakistan during 2009 following RCBD with three repeats. The objective was to study varietal variation and interaction between aphids and predators. The genotype V-05066 was found comparatively more susceptible with maximum aphids population (18.69/tiller) while V-04178 proved as more resistant with minimum population (5.73/tiller). The peak population of the pest was observed on February 24 (46.07/tiller). The population of lady bird beetles (Coccinellids spp.) larvae and adults, green lacewing (Chrysoperla carnea) larvae and hover fly (syrphid fly) larvae reached to peak levels on March 21 (0.66/tiller) on March 28 (0.54/tiller), April 1 (0.09/tiller) and April 4 (0.47/tiller), respectively. The correlation between aphid population and Coccinellid larvae was significant (P<0.05) and positive with r-value of 0.680. Coccinellid larvae played maximum role (8.4%) in fluctuation of aphid population followed by C.carnea larvae (4.8%).
Page(s):
209-216
DOI:
DOI not available
Published:
Journal: Journal of Agricultural Research, Volume: 50, Issue: 2, Year: 2012