Abstract

The current work was carried out to evaluate the biochemical effects of five insect growth regulators (IGRs); applaud (buprofezin), consult (hexaflumuron) and match (lufenuron) as chitin synthesis inhibitors (CSIs); mimic (tebufenozide) as ecdysone agonist (EA) and admiral (pyriproxyfen) as juvenile hormone analogue (JHA) against the housefly M. domestica. The IGRs were applied by feeding 1 st instar larvae on diets mixed with these IGRs at 100 and1000 ppm for three days to determine the effects of these IGRs on the glucose, protein and the amino acid content as well as the phosphatase and transaminase enzymes. The obtained results indicated that all the tested IGRs except applaud increased the glucose content in the homogenate of 3 rd larval instar of M.domestica. The total protein content and total concentration of amino acids increased with applaud, admiral and mimic, while decreased with match and consult. In addition, the tested IGRs significantly increased the activity of acid and alkaline phosphatase .Mimic exhibited a severe reduction in the activity of AcP. Admiral, mimic and applaud induced a significant stimulatory effect on total AST activity, while match induced inhibitory effect at 1000 ppm. Consult had no effect on the total activity of AST. With respect to the total ALT activity, applaud and admiral induced a significant stimulatory effect, in contrast, match and consult elicited inhibitory effect on the total ALT activity.

Highlights

  • The housefly, Musca domestica is found in homes, horse stables, poultry farms, and ranches in enormous numbers

  • First instar larvae of M .domestica were treated with 100 and 1000 ppm of the tested insect growth regulators to study the effect of these IGRs on total protein, glucose, phosphatase and transaminase enzymes in the whole larval body extracts

  • Results given in Table (1) indicated that all the tested IGRs except applaud increased the glucose content of 3rd larval instar of M.domestica treated as 1st larval instar

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Summary

INTRODUCTION

The housefly, Musca domestica is found in homes, horse stables, poultry farms, and ranches in enormous numbers. The biochemical effects of IGRs on the carbohydrate content on M. domestica were studied by Ishaaya and Casida (1974). Effects of IGRs on the protein content on M. domestica were studied by Ishaaya and Casida (1974) with diflubenzuron ; ElKordy (1985) by diflubenzuron and triflumuron; Bakr (1986) with dimilin, BAY SIR and altosid; Hamdy (1988) with chlorfluazuron and teflubenzuron and ElBermawy (1994) with atabron (IKI 7899), BAY SIR and pyriproxyfen. Effects of IGRs on the amino acids of M. domestica were studied by Youssef (1985) using JH1 and by Bakr (1986) using dimilin, BAY SIR and altosid. The present study was carried out to evaluate the impacts of five insect growth regulators (applaud, consult, match, mimic and admiral) on the the glucose, protein and the amino acid content as well as the phosphatase and transaminase enzymes on M. domestica larvae

MATERIALS AND METHODS
Determination of total protein content
RESULTS
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