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Journal: JOURNAL OF AGRICULTURAL SCIENCES | Year:1386 | Volume:13 | Issue:2 (SUPPLEMENT) | Start Page:329 | End Page:339

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Title

LABORATORY STUDY OF SEARCHING BEHAVIOR AND CONSUMPTION RATE OF PREDATORY BUG, ORIUS ALBIDIPENNIS (HET.: ANTHOCORIDAE) ON THRIPS TABACI AND TETRANYCHUS URTICAE

Pages

 Start Page 329 | End Page 339

Abstract

 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 Reuter preying on Onion thrips THRIPS TABACI and two spotted spider mite TETRANYCHUS URTICAE, 2nd instar larvae of onion thrips and adult female mites were used as preys. Experiments were conducted as Completely Randomized Design (CRD) by replacement of the preyed hosts with two tests choice and non- choice. In two choice test predation rate of the female predatory bug on onion thrips and spider mites were 2.4±0.4 and 1.4±0.35, respectively, which didn't show significant differences but parameters of encounter rate, succes rate and handling time (s) on onion thrips were 0.36±0.06, 0.69±0.12 and 636±22, respectively. These data for two spotted spider mite 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 mite was 2±0.44 which didn't 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, 0.45±0.09 and 522±62.6 which observed significant differences among them.

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