Effect of the Insect Growth Regulator “ Lufox” on Some Biological Aspects of the Soft Tick Argas persicus (Oken)

Reda Bakr,Dalia Salem,Amira Abd El Hamid,Wafaa Radwan,Nawal Shanbaky,Nadia Helmy

doi:10.21608/eajb.2018.11908

Abstract

Lufox interfered with the reproduction and development of Argas persicus when fed adult female and second nymphal instar were topically treated with a single dose (10 ul/tick) of Lufox at three different concentrations (10, 50, and 150 ppm). Generally, the effects of Lufox were dose- dependent, increased by increasing dose concentration, and temporally dependent on the physiological state of the treated tick. Lufox treatment of the adult female A. persicus at different periods of its reproductive cycle reduced fecundity and fertility of the female tick by decreasing the number and percent hatching of the deposited eggs, respectively. Lufox treatment prolonged the pre-oviposition, oviposition, and the egg incubation periods. The effects were most prominent when females were treated during vitellogenesis (3rd day after feeding). Lufox was toxic to A .persicus, induced mortality of the treated newly moulted fed second nymphal instar to reach 100% at 150 ppm. Application of Lufox prolonged the premoulting periods of the treated 2nd and the resulted 3rd nymphal instars, delayed, and reduced adult emergence. Also, Lufox treatment led to production of different deformities in legs and inability to shed exuvia of the resulted 3rd instar nymphs and an inhibition of adult emergence. The probable physiological bases of the observed effects of Lufox on adult female and nymphs were discussed.

Highlights

The fowl tick Argas persicus (Oken) infests poultry and wild birds in Egypt and several other countries around the world (Hoogstraal et al, 1975)
We evaluated the effect of the Insect Growth Regulators (IGRs) mixture Lufox (Lufenuron plus fenoxycarb) on fecundity, fertility, and oviposition of adult female A .persicus treated at different periods of its reproductive cycle
Results in Table (3) demonstrate that the preoviposition and oviposition periods of females treated with Lufox on the 7th daf were increased significantly (p

Summary

Introduction

The fowl tick Argas persicus (Oken) infests poultry and wild birds in Egypt and several other countries around the world (Hoogstraal et al, 1975). This species is of a considerable veterinary importance as a parasite of poultry and may act as a limiting factor in poultry production (Khalil, 1979). Antibodies to CCHF and WNV have been demonstrated in sera of humans and lower animals in Egypt (Taylor et al, 1956; Darwish et al, 1977), respectively. It is important to look for an efficient controlling method of the tick but safe to the animal hosts and environment

Methods

Results

Conclusion