THE ROLE OF SOME BIOLOGICAL AND CHEMICAL AGENTS IN REGULATING THE POPULATION DENSITY OF THE cortes LEAF WORM, Spodoptera littoralis (BOIS D.) AND SOME RELATED BENEFICIAL INSECTS | ||
| Journal of Plant Protection and Pathology | ||
| Article 5, Volume 28, Issue 7, July 2003, Pages 5713-5724 PDF (1.52 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2003.251423 | ||
| Author | ||
| M. M. M. Aly | ||
| Plant protection Research Institute, Agricultural Research Center, Ministry of Agriculture, Dokki, Giza | ||
| Abstract | ||
| Field experiment was Conducted in TooKh district, Kalubia Governorate, during 2001 and 2002 cotton seasons to study the efficacy of insecticidal effect of some biological and chemical agents (Agrein, Cascade, Sumi -- alpha, mixture of Dursban + Atabron and Larvin) against the S. littorals larvae and some related beneficial insects, namely, Scymnus spp < /em>., Chrysopa carne a, Orius spp < /em>., Coccinella undecimpunctata, Paederus alferii and Syrphus spp < /em>. The results indicated that the mixture of Dursban + Atabron formulation caused the highest effect on the cotton leafworm, S. littoralis. The general mean of infestation percentages, during the two successive seasons of investigation were 13.1 % in the 0 ursban + A tabron a rea followed by Sumi •• alpha (15.15 %), Agrein (16.58 %), Larvin (19.1 %) and Cascade (21.75 %), treatments.The results indicated, also that the decreasing percentages in the population size of the predators under investigation were differed between the various treatment areas. The efficacy of the biological insecticide formulations l.e. Agrein on the cotton leafworm S. littoralis was higher than that on the predator populations .On the contrary. the chemical insecticides harboured high effects on both S. littoralis and the related predator populations. | ||
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