بررسي آزمايشگاهي رفتار جستجوگري و تغذيه اي (Orius albidipennis (Het:Anthcoridae روي تريپس پياز و كنه دولكه اي

Laboratory study of searching behavior and consumption rate of predatory bug, Orius albidipennis (Het.: Anthocoridae) on Thrips tabaci and Tetranychus urticae

Natural enemies of pests (parasitoides and predators) usually show different behavior when encountered with two or more prey. The study carried out on behavior parameters of the predatory bug. Orius albidipennis Renter preying on Onion thrips Thrips tabaci and two spoiled spider mite Tetranychus urticae. 2nd instar larvae of onion thrips and adult female mites were used as preys. Fx peri men is were conducted as Completely Random ized Design (CRD) bv replacement of the preyed hosts with two tests choice and non- choice. In two choice lest predation vale of the female predatory bug on onion thrips and spider mites were 2 4±0.4 and 1,4± 0.35. respectively, whieli didnʹt show significant differences but parameters of encounter rale, succes rale and handling time (s)on onion thrips were 0.36 ± 0.06. 0.69 ±0.12 and 636 ± 22, respectively. These data for two spoiled spider mile were 0.11 ± 0.03, 0.36 ± 0.11 and 300 ± 77.6 in which, there were significant differences among between them. In non-choice tests, predation rate of the predatory bug on 2nd instar larvae of onion thrips was 2 ± 0.31 and on two spotted spider mile was 2 ± 0.44 which didnʹt show significant difference. In these tests, encounter rate, success rate and handling time parameters of the predatory bug on onion thrips were 0.13 ± 0.01.0.7 ± 0.08 and 948 ± 33.6 and for two spotted spider mite were 0.08 ± 0.02. 0.4.5 ± 0.09 and 522 ± 62.6 which observed significant differences among ihem.