Resistance of different genotypes of Helianthus annuus Linnaeus against Bemisia tabaci and Empoasca spp. and their correlation with yield
2003
Aslam, M. | Misbah-ul-Haq, M. (University of Arid Agriculture, Rawalpindi (Pakistan). Dept. of Entomology)
The research work was carried out to study the resistance of 9 genotypes (65 A 24, DK 3915, FH 81, PN 2KS, PARSUN I, IBD 2KS, HYSUN 33, SH 3322, PG 2KA) of sunflower against Bemisia tabaci and Empoasca spp. in autumn 2001 at Dhoke Wajjan. In case of whitefly (Bemisia tabaci) and green leaf hopper (Empoasca spp), the highest population (7.63 plus minus 0.37 and 7.71 plus minus 0.41 respectively) was recorded in the 39 week of the year 2001. The genotype PN 2KS, SH 3322 and IBD-2KS were found to be resistant against Bemisia tabaci. Whereas DK 3915 found to be susceptible. Other genotypes, 65 A 24, PG 2KA, PARSUN I and FH 81 were found to be highly susceptible. The correlation was found to be negative between pest population and yield of genotypes. The results for green leaf hopper (Empoasca spp) revealed that SH 3322, PN 2KS and IBD-2KS were found to be resistant. Whereas DK 3915 and 65 A 24 were susceptible. FH 81 was found to be highly susceptible. Correlation was found to be negative between yield and pest population (P less than 0.01).
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