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Laboratory evaluation of neem formulations with and without additive against the two spotted spider mite, Tetranychus urticae Koch

Dimetry, N.Z.; Amer, S.A.A. and Saber, S.A.


2008 - Volume: 48 Issue: 3-4 pages: 171-176


Keywords

toxicological biological activity Neem Azal T/S T/S Fort Tetranychus urticae

Abstract

Neem Azal T/S (commercial formulation of Neem seed kernel extract) was tested for its efficacy as a deterrent, toxicant or growth inhibitor against the two spotted spider mite, Tetranychus urticae Koch. Addition of T/S Fort increased its effect on mite females and eggs. Neem Azal T/S with T/S Fort at the ratio of 1:2 showed the highest acaricidal activity compared with the other formulations tested. Newly emerged females sprayed with the median concentration (0.086%) of Neem Azal T/S induced a serious chronic effect on their biotic potential. A high significant reduction in the egg production with an increase in percent of female sterility and a significant decrease in longevity were recorded. However, egg hatchability was slightly reduced while durations of immature stages were significantly increased.

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Article editorial history

Date accepted:
2008-10
Date published:
2009-05-29

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License
2008 Dimetry, N.Z.; Amer, S.A.A. and Saber, S.A.

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