| Effects of some insecticides used in tomato on preimaginal stages of Trichogramma brassicae(Hymenoptera: Trichogrammatidae) |
| Paper ID : 1003-3IICE (R1) |
| Authors: |
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sedighe ashtari * Faculty Member,Plant Protection Research Department, Markazi Agricultural and Natural Resources Research and Education Center, Agricultural Research,Education and Extension Organization,AREEO, Arak, Iran. |
| Abstract: |
| Trichogramma brassicae (Hym: Trichogrammatidae) is used for biological control of Tuta absoluta (Lep: Gelechiidae), a key pest of tomato. In some IPM programs there is a need for integration of chemical control and T. brassicae releases. Therefore, effects of chemical insecticides on T. brassicae should be known. In this study, effects of insecticides viz. abamectin, emamectin benzoate, acetamiprid and flubendiamid were investigated on the preimaginal developmental stages of T. brassicae using egg card dipping method in laboratory conditions.The Egg cards containing approximately 140 parasitised eggs of Sitotroga cerealella (Lep: Gelechiidae) were dipped into insecticide solutions prepared at the recommended dose (abamectin 1500 mg/l, emamectin benzoate 1000 mg/l, acetamiprid 500 mg/l and flubendiamid 500 mg/l) for 5 second at larva, prepupa and pupa stages of T. brassicae. The emergence rate, fecundity and sex ratio of offspring were determined. Abamectin and emamectin benzoate reduced emergence rate, fecundity and sex ratio of offspring for all developmental stages and classified as slightly harmful (rank 2) according to the guidelines of IOBC. Flubendiamid was harmless (rank 1) considering emergence rate of parasitized eggs, fecundity, emergence rate and sex ratio of offspring, however, acetamipride was harmless only on pupae. The results showed that flubendiamid had lower toxicity compared with other tested compounds and could be used in integrated pest management programs in tomato . |
| Keywords: |
| Key word: Pesticides, Side effect, ,Trichogramma brassicae, Tomato |
| Status : Paper Accepted (Poster Presentation) |
