Efecto de la planta hospedera sobre el potencial de daño de Oligonychus yothersi (McGregor, 1914)

Abstract

Mites belonging to family Tetranychidae are widely distributed worldwide, in which around 1250 species have been reported, with Oligonychus yothersi being one of the important species in agricultural production. This study aimed to evaluate the effect of the host plant on the damage potential of O. yothersi by studying duration of the life cycle, reproductive parameters and longevity and parameters of the life tables on peach, apple and rose leaves under laboratory conditions in the Entomology laboratory, Faculty of Agricultural Sciences (21°C ± 1.14°C, 52% ± 9.28% HR). The biological cycle of O. yothersi reared on peach, apple, and rose leaves under laboratory conditions showed differences in the duration of some development stages, where the stages from egg to chrysalis were evidently shorter in peach and apple. Regarding the reproductive parameters, it was observed that the preoviposition time was shorter when the mite was reared on peach leaves, while no differences were observed on apple and rose leaves. In the case of the oviposition, postoviposition, fecundity, and longevity periods, again the maximum values were observed in peach leaves, followed by apple, and rose leaves, which shows that peach plants could offer the best characteristics for the development of O. yothersi. Finally, the parameters of the life tables also showed differences in the net reproduction rate (Ro) 39.44 in peach, mean generation time (T) (days) 18.58 in apple, intrinsic rate of increase (rm) 0 04 in peach, in the case of finite growth rate (λ) (1.01) there was no difference. Based on the parameters, it is suggested that peach is a potential host for O. yothersi.