Evaluating the possibility of using anthers and resistant varieties of roses in the management of rose aphids

Integrated pest management with emphasis on the simultaneous use of biological control agents and resistant cultivars can be an efficient strategy for pest management. In this study, the effect of susceptible (Orange) and resistant (Tea) rose cultivars on life table parameters of the rose aphid Macrosiphum rosae (L.) (Hem.: Aphididae) and its predator ladybug, Hippodamia variegata (Goeze) (Col.: Coccinellidae), was evaluated in laboratory conditions. The obtained data were analyzed using age-stage life table theory, sex-division analysis, and the means and standard errors were calculated using the bootstrap model. The average growth and development period of the immature stage (purging period) of Shte Rose on the resistant cultivar (15.20 days) was significantly longer than that of the susceptible cultivar (9.53 days). The intrinsic rate of population increase (r) of Shte Rose on the susceptible and resistant cultivars was 0.330 and 0.115 per day, respectively. In addition, the values ​​of the intrinsic rate of population increase (r) of ladybirds feeding on cultured achenes on the susceptible and resistant cultivars were 0.145 vs. 0.126/day, respectively. The total period before oviposition (TPOP) of ladybirds on the resistant cultivar (26.66 days) was significantly longer than that on the susceptible cultivar (23.83 days), but the total fecundity on the resistant cultivar (370.34 eggs/female) was significantly lower than that on the susceptible cultivar (451.65 eggs/female). The results obtained in this study, especially the low intrinsic population growth rate and fecundity of this predator on the resistant Tea cultivar, indicate the need for further research on the combined use of resistant cultivars and biocontrol agents in rose control programs.