The subgenus Persicargas (Ixodoidea: Argasidae: Argas). 22. The effect of feeding on hormonal control of egg development in Argas (Persicargas) arboreus

Shanbaky, Nawal M.; Khalil, Galila M.

doi:10.1016/0014-4894(75)90004-1

Cited by 30 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present findings suggested that the response of the abamectintreated female A. arboreus depended on its physiological state during application. The female was most sensitive and responding to the effects of abamectin application during early vitellogenesis on the 3 rd daf (Shanbaky and Khalil, 1975), to less extent during the early previtellogenesis and the least sensitive and responding during the start of oviposition. During early oviposition most of oocytes have completed their development and did not respond.…”

Section: Effect Of Abamectin On Reproduction Of Adult Femalementioning

confidence: 95%

See 1 more Smart Citation

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

Aboutaleb

Shanbaky

Ahmed

et al. 2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

View full text Add to dashboard Cite

Entomology Journal publishes original research papers and reviews from any entomological discipline or from directly allied fields in ecology, behavioral biology, Topical application of a single dose (10µl/tick or egg batch) of different concentrations of abamectin (an avermectin) has lethal and biological effects on the engorged mated adult female, immatures and egg of Argas (Persicargas) arboreus that induced 100% mortality at 25,15 and 10 ppm, respectively. Abamectin treatment at lower concentrations of 1-10 ppm interfered with the female reproduction, nymphal and egg development.Abamectin topical (3-10 ppm) application on mated engorged adult female A. (P.) arboreus at different intervals of its reproductive cycle reduced fecundity and fertility of the female, prolonged its preoviposition, oviposition and the egg incubation periods. The effects were most prominent during vitellogenesis and the least at the start of oviposition.Abamectin treatment of the newly moulted fed 2 nd nymphal instar, delayed its moulting and of the resulted 3 rd instar and reduced adult emergence. The treatment caused paralysis and various deformities (15.6-28.6%) as missing legs at the coxal level, changes in colour and failure to moult or to detach the old exuvia in the resulted 3 rd nymphal instar.Egg batch treatment by dipping the freshly deposited eggs for 20 seconds in an aqueous solution of 1-5 ppm abamectin was more effective in reducing normal hatching, increasing unhatching and total inhibition of egg development than topical treatment. However, both methods of treatment similarly prolonged the egg incubation periods and caused abnormal hatching, malformations, and anomalies in the eggs and embryos.

show abstract

Section: Effect Of Abamectin On Reproduction Of Adult Femalementioning

confidence: 95%

“…and at the start of oviposition (7 daf.) (Shanbaky and Khalil, 1975). Pairs of treated and untreated control females and normal males were kept separately in rearing tubes at 28°C ± 1 and 75% RH.…”

Section: Application Of Abamectin: 1 Female Treatmentmentioning

confidence: 99%

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

Aboutaleb

Shanbaky

Ahmed

et al. 2019

Egyptian Academic Journal of Biological Sciences. A, Entomology

View full text Add to dashboard Cite

show abstract

“…and closed circles ( meal and mating were essential for induction of vitellogenesis and oviposition in most ticks with the exceptions of autogenous species (Connat et al. 1986;Diehl et al, 1982;Oliver, 1986;Shanbaky and Khalil, 1975;Chinzei et al, 1989). Our present results suggest that if physiological (mainly endocrinological, but not nutritional) conditions are suitable or if appropriate stimulating factor(s) are given experimentally, vitellogenesis can be initiated and almost completed even in uncngorged mated females.…”

Section: Changes Of Vg Titer In the Hemolymph And Ovarian Developmentmentioning

confidence: 97%

“…Both of these two stimuli are thought to be essential in inducing hormone(s) release, which directly or indirectly stimulates Vg synthesis in the fat body. Evidence suggests that vitellogenesis in ticks is under hormonal control (Shanbaky and Khalil, 1975). and that this gonadotropic hormone is a juvenile hormone-like compound (Connat et al, 1983;Pound and Oliver, 1979).…”

Section: Introductionmentioning

confidence: 97%

Cypermethrin induction of vitellogenesis and ovarian development in unfed adult femaleOrnithodoros moubata(Acari: Argasidae)

Chinzei

Itoh

Ando

1989

Invertebrate Reproduction & Development

View full text Add to dashboard Cite

Vitellogenesis in ticks is known to be induced by engorgement and mating. In this paper, the synthetic pyrethroid cypenethrin (CyM) is shown to induce production of yolk protein precursor, vitellogenin (Vg), and ovarian development in unengorged mated adult female Ornithodoros moubata. The levels of Vg found in the hemolymph and ovarian development induced by CyM were dose-dependent. i.e., CyM doses of more than 0.2 and 1.0 &tick were needed for significant increase of Vg titer in the hernolymph and yolk deposition in oocytes, respectively. Immunological and electrophoretical analyses of Vg and Vitellin (Vn) induced by CyM were identical with those induced by engorgement. Vg titer induced by CyM in unengorged females followed approximately the same time course as that in the normal engorged females. However, Vg titer induced by CyM continued to increase after day 8 and reached a maximum (95 pg/pl) on day 10 after treatment, while Vg titer induced by engorgement decreased again after reaching a maximum (60 &pl) on day 6, correlated with yolk Vn deposition in mcytes. Ovarian development induced by even high doses (10 or 20 pg/tick) of CyM was slow compared to normal development stimulated by engorgement. Oviposition was not observed in females treated with CyM.

show abstract

“…In argasids such as Argas arboreus (Shanbaky and Khalil, 1975), Ornithodoros moubata (Connat et al, 1986;Chinzei et al, 1992), and Ornithodoros parkeri (Oliver et al, 1992), it has been shown that the synganglion or brain produces a factor that stimulates oocyte development. This factor, recognized in 0. moubata, appears to be a peptide (Chinzei et al, 1992); however, it is unknown if a similar factor is present in ixodid ticks.…”

mentioning

confidence: 97%

Vitellogenin and Ecdysteroid Titers in Ixodes scapularis during Vitellogenesis

Xx²,

Jh³

1997

The Journal of Parasitology

View full text Add to dashboard Cite

Ecdysteroids are the only hormones unequivocally identified thus far in ticks. We found a positive correlation between ecdysteroid concentration and vitellogenin synthesis in female Ixodes scapularis. Vitellogenin (Vg) synthetic activity was measured by an in vitro assay for Vg, involving incubations of the fat body with 35S-methionine and immunoprecipitation collected on a solid-phase matrix, protein A. Vitellogenin synthetic activity in the fat body was undetectable in unfed females but was detected after tick attachment to the host. Vitellogenin production in the fat body remained low from attachment until 2 days prior to detachment from the host. Vitellogenin synthesis in the fat body peaked 2 days after detachment and declined to a level 2-3 times above background from 6 days after dropping from the host through oviposition. A peak of ecdysteroids in females 6 days after attachment preceded an increasing rate of Vg synthesis, suggesting a positive correlation between these parameters. Ecdysone and 20-hydroxyecdysone, the 2 major ecdysteroids present during vitellogenesis, could not be detected in females prior to feeding or 2 days after attachment to the host; however, concentrations began to increase 4 days after attachment, peaked during rapid engorgement, and subsequently declined.

show abstract

The subgenus Persicargas (Ixodoidea: Argasidae: Argas). 22. The effect of feeding on hormonal control of egg development in Argas (Persicargas) arboreus

Cited by 30 publications

References 11 publications

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

Effect of Abamectin on Reproduction and Development of an Avian Tick, Argas (Persicargas) arboreus (Ixodoidea: Argasidae)

Cypermethrin induction of vitellogenesis and ovarian development in unfed adult femaleOrnithodoros moubata(Acari: Argasidae)

Vitellogenin and Ecdysteroid Titers in Ixodes scapularis during Vitellogenesis

Contact Info

Product

Resources

About