Functional responses of Orius albidipennis Reuter (Hemiptera, Anthocoridae) to Tuta absoluta Meyrick (Lepidoptera, Gelechiidae) on two tomato cultivars with different leaf morphological characteristics
Salehi, Zohreh; Yarahmadi, Fatemeh; Rasekh, Arash; Sohani, Nooshin Zandi
Abstract Potential of Orius albidipennis Reuter as a biological control agent of tomato leaf miner (Tuta absoluta Meyrick) eggs was evaluated and comparing by estimating its functional response on the two tomato cultivars with different physical characteristics under laboratory conditions. Eight prey densities (8, 10, 15, 20, 25, 30, 35, and 40 eggs per leaf disc) were exposed to female adult of the predator during 24-h period for each tested cultivar under controlled conditions of 26 ± 2°C, 60 ± 5% RH and 16:8 h (L:D). Our results revealed that adult females of the predatory bug exhibited type III functional responses to different the densities of prey on both cultivars. The attack rate of the predator on trichome dense cultivar Fillous® was significantly lower than trichome non-dense cultivar Cherry®. In addition, its handling time on Fillous® was significantly higher than Cherry® cultivar. Our study demonstrates that O. albidipennis can be a good potential candidate for the biological control of T. absoluta eggs in tomato fields and greenhouses. The predator efficacy in low dense trichome cultivars is significantly higher than that in high dense trichome cultivars. The results of the study can be used in integrated pest management programs of T. absoluta.