TITLE

Impact Of Three Commercial Insecticides On Some Biological Aspects Of The Cotton Leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

AUTHOR(S)
Ebeid, A. R.; Gesraha, M. A.
PUB. DATE
May 2012
SOURCE
Journal of Applied Sciences Research;May2012, Vol. 8 Issue 5, p2620
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The sensitivity of Spodoptera littoralis 6th larval instar towards the three commercial insecticides: Tracer, Pendelta and Pyriban were investigated under laboratory conditions. All tested insecticides showed highly adverse bioactive effects. The highest tested concentration induced 20, 100 and 40% mortality 24 hours post treatment, while the lowest tested concentrations induced 40, 70 and 60% mortality, respectively. The middle concentration causes 80% mortality for the three tested insecticides. The calculated LC50 was: 0.034, 0.135 and 0.170% for Pendelta, Tracer and Pyriban, respectively. The highest concentration of Pendelta achieved 100% mortality 24 hours post treatment, and suppressed the larval activity even at the low concentration. Results also showed a reduction in food consumption and larval growth rate in case of Teacer and Pendelta treatments. The efficiency of converting ingested and digested food into body substance was obviously reduced in Pendelta treatment. On the other hand, the approximate digestibility was considerably not affected in all treatments, except in Tracer higher concentration treatment.
ACCESSION #
80122523

 

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