تاثیر ارقام حساس و مقاوم فلفل گلخانه ای بر پارامترهای جدول زندگی و نرخ شکارگری کنه شکارگر Neoseiulus californicus روی کنه پهن Polyphagotarsonemus latus

Biological control and host plant resistance are often combined in integrated pest management programs, yet the interactions between plants, herbivores, and natural enemies (predators, parasites, and parasitoids) are highly intertwined. Differences in the quality of the host plant may positively or negatively affect the strength of the top-down effects. In this study, the effects of seven greenhouse pepper cultivars, including susceptible cultivars (Lomus and AD90), semi-resistant cultivar (Clavesol), and resistant cultivars (Chidem, Sympti, Sunset, and AG50) on the life table and predation parameters of Neoseiulus californicus (McGregor) when feeding on different stages of the broad mite Polyphagotarsonemus latus (Banks) were investigated in laboratory conditions. A significant difference was observed in the life table parameters and predation rate among different cultivars. The highest value of the intrinsic rate of increase (r) (0.134 and 0.130 per day) and net reproduction rate (R0) (6.84 and 6.81 eggs/individual) was observed in the susceptible cultivars of Lumus and AD90, respectively. In contrast, the highest value of the net predation rate (C0) (1168 prey/predator) was observed on the Sympti cultivar, the highest value of the finite predation rate (ω) (30.09 prey/predator) and stable predation rate (ψ) (27.81 prey/ predator) was observed on the Sunset cultivar. Although the susceptible cultivars provided the highest population growth potential for N. californicus, the predator’s predation performance on the resistant and semi-resistant cultivars was significantly higher than in the susceptible cultivars. Resistant cultivars and the predatory mite N. californicus can improve the efficiency of the broad mite control on greenhouse peppers despite some negative effects on the predator.