USING SOME INSECTICIDES FOR CONTROLLING COTTON AND WATERMELON APHID, APHIS GOSSYPII GLOVER ON CUCUMBER PLANTS REFERRING TO THE YIELD | ||
| Egyptian Journal of Agricultural Research | ||
| Article 3, Volume 90, Issue 2, July 2012, Pages 517-527 PDF (217.67 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2012.160147 | ||
| Authors | ||
| MONA A. MOHAMED; HOMAM B. HOMAM | ||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt. | ||
| Abstract | ||
| Field experiments were conducted to investigate the effectiveness of five insecticides (Carbosulfan 25% WP, Acetamiprid 20% SP, Imidacloprid 35% SC, Pyrethrins 5% EC and Mineral oil 96% EC) on the cotton and watermelon aphid, Aphis gossypii Glover on cucumber plants at Behira and Benisuef governorates in Egypt during two successive seasons 2009 and 2010 and evaluated their effects on yield. The obtained data showed that, Acetamiprid, Carbosulfan and Imidacloprid recorded the lowest population of A. gossypii in both Behira and Benisuef in 2009 and 2010 during summer plantation seasons, while Mineral oil gave intermediate effect in reducing population of A. gossypii. On the other hand, Pyrethrins as a natural plant origin insecticide showed the least effect in reducing population of A. gossypii (12.81 & 9.30 “Behira” and 8.72 & 9.81 “Benisuef “ individuals/leaf/season) in 2009 and 2010 during summer plantation seasons, respectively. Significant differences were proved between treated and untreated plots in the two studied seasons. The highest cucumber yield was collected from plots treated with Acetamiprid followed by Carbosulfan, Imidacloprid, Mineral oil and Pyrethrins which gave the lowest yield. The results concluded that Acetamiprid proved to be the most effective insecticide against A. gossypii with highest cucumber yield. As for persistence, data clearly indicated that Acetamiprid, Carbosulfan and Imidacloprid showed the longest persistent behaviour and showed the highest reduction in aphid population till the 10th day relaxation period after application (88.06, 75.01 “Acetamiprid“ and 74.93% & 87.22 “Carbosulfan” , 80.82 and 75.52% “Imidacloprid”) in both Behira and Benisuef during summer season 2010, respectively. On the other hand, Mineral oil and Pyrethrins caused the least reduction against A. gossypii population after ten days of relaxation period, i.e. (69.81 and 48.33% “Mineral oil“ & 68.32 and 44.35% “Pyrethrins”) the same season, respectively. | ||
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