TITLE

Effect of Teflubenzuron and Bacillus thuringiensis on Some Haematolgical Parameters of Cotton Leaf Worm, Spodoptera littoralis (Boisd.) and Albino Rats

AUTHOR(S)
Abdel-Al, Aziza E.; Osman, Hanan H.; Ryad, Naglaa F.
PUB. DATE
December 2011
SOURCE
Egyptian Journal of Biological Pest Control;2011, Vol. 21 Issue 2, p203
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A study to evaluate the toxicological and hematological effects of the entomopathogen (Bacillus thuringiensis kurstaki) and the insect growth regulator (Teflubenzuron) on the cotton leaf worm, Spodptera littoralis (Boisd.) under laboratory conditions, as well their effects on the population % of the pest in Egyptian clover fields and also to evaluate their toxicity on some hematological parameters of the albino rats was carried out. Obtained results indicated that total haemocyte counts (THC) of S. littoralis 6th instar treated in 4th instar with the chitin synthesis inhibitor Teflubenzuron was significantly increased compared to the control. While in Bt, the THC was slightly decreased (6.8 %) (P<0.05) compared to the control. Teflubenzuron affected some types of blood cells. It significantly decreased the number of oenocytoids, whereas plasmatocytes were significantly (P<0.001) increased. Meanwhile, Bt. increased insignificantly the number of prohaemocytes and spherulocytes, where plasmatocytes, granulocytes were slightly decreased compared to the control. Application of Bt. kurstaki for 12 weeks to rats at dosages of 10000mg/ kg/day didn't produce toxic effects. The effect of Bt. showed insignificant changes in body weight, liver, kidney and testicular weights, compared to the levels in the control. On the contrary, Teflubenzuron caused a significant decrease in body and kidney weight of rats and increased liver weight. In addition, there was a slightly decrease in testicular weight compared to the control. It was concluded that Bt. had not any segnificant effect on the haematological parameters.
ACCESSION #
96987333

 

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