| A laboratory investigation on the side effects of four pesticides on the 4th-instar nymphs of the predatory bug, Andrallus spinidens (F.) (Hemiptera: Pentatomidae) |
| Paper ID : 1232-3IICE (R2) |
| Authors: |
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arezoo yousefi-porshokouh *1, Jafar Mohaghegh2, Younes karimpour3, Jalal Shirazi4 1Iranian Research Institute of plant protection, Tehran, Iran 2Sunn Pest Research Department, Iranian Research Institute of Plant Protection, Tehran, Iran 3Department of Plant Protection, Faculty of Agriculture, University of Urmia, Urmia, Iran 4Iranian Research Institute of Plant Protection, Agricultural, Education and Extension Organization (AREEO), Tehran, Iran. |
| Abstract: |
| The predatory bug, Andrallus spinidens (F.) is one of the most important biological control agents of lepidopteran pests in the rice fields of Iran. An experiment was conducted to evaluate the effects of 4 recommended pesticides (including 3 insecticides and 1 herbicide) on A. spinidens thorough a completely randomized design (CRD) replicated 6 times. The ingestion method was performed on the 4th-instar nymphs of the predator. Pesticides concentration were prepared based on the field recommended doses. Distilled water was used as the control. Newly emerged 4th instar nymphs were confined in Petri dishes and provided with 2-ml of pesticides inside small containers for 24 hours. Mortality was recorded daily until the adult emergence. Thereafter, the survived nymphs were provided with distilled water and 2-3 last instar larvae of Galleria mellonella. The experiments were carried out in a growth chamber at 25±0.5 °C, 70±5% RH and a photoperiod of 16:8 h (L: D). Based on the total effect of IOBC classification , Trichlorofon and Matrin insecticides with 100% mortality were placed in the class 4 (harmful). Similarly, Butachlor and Tebufenozide were grouped in class 2 (slightly harmful) with 54.48% and 46.43% total effect, respectively. Therefore, if field results are confirmed, Trichlorofon and Matrin insecticides are not suitable candidates for integrated pest management programs in rice when the predator is active. |
| Keywords: |
| Key words: Andrallus spinidens, side effects, predator, oviposition. |
| Status : Paper Accepted (Poster Presentation) |
