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International Journal of Agricultural Research
  Year: 2014 | Volume: 9 | Issue: 4 | Page No.: 210-218
DOI: 10.3923/ijar.2014.210.218
 
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Effect of Certain Low Toxicity Insecticides Against Tomato Leaf Miner, Tuta absoluta (Lepidoptera: Gelechiidae) with Reference to Their Residues in Harvested Tomato Fruits
Y.A. Mahmoud, H.A. Salem, Sh. E.M. Shalaby, A.S. Abdel-Razak and I.M.A. Ebadah

Abstract:
Tomato leaf miner Tuta absoluta (Meyrick) is present throughout the crop duration, larvae can infest leaves, flowers, stem and fruits that causing important losses in tomatoes. So, this study was carried out to evaluate the efficiency of four low toxicity insecticides against this insect under field conditions, as well as the dissipation of coragen and aljambo residues in harvested tomato fruits were determined. Results indicated that the differences between the numbers of alive larvae ranged from low significant as in avant and superlambada to highly significant as in coragen and aljambo insecticides in relation to control at all observation periods and the percent reduction in infestation with tomato leaf miner decreased with time elapsed. Coragen and aljambo affected strongly the number of eggs laid by T. absoluta females where highly significant decrease in the number of deposited eggs was observed. At all tested periods, there were highly significant reductions in the number of tunnels in the leaves treated with coragen and aljambo insecticides. On the other hand, the initial deposits of coragen and aljambo on tomato fruits were 11.4 and 9.6 ppm, respectively. The residue loss of both insecticides continued on over time. Washing process caused significant decrease in both compounds residue. Generally, coragen insecticide was the most toxic against this pest followed by aljambo and superlambda while, avaunt was the lowest toxic compound.
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How to cite this article:

Y.A. Mahmoud, H.A. Salem, Sh. E.M. Shalaby, A.S. Abdel-Razak and I.M.A. Ebadah, 2014. Effect of Certain Low Toxicity Insecticides Against Tomato Leaf Miner, Tuta absoluta (Lepidoptera: Gelechiidae) with Reference to Their Residues in Harvested Tomato Fruits. International Journal of Agricultural Research, 9: 210-218.

DOI: 10.3923/ijar.2014.210.218

URL: https://scialert.net/abstract/?doi=ijar.2014.210.218

 
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