Chemosterilization of Potato Tuberworm. 1. Effect of Metepa on the Fertility of Males12

Harwalkar, M. R.; Khaier, S. N.; Rahalkar, G. W.

doi:10.1093/jee/64.2.358

Cited by 8 publications

(2 citation statements)

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“…males and females Table 2 Fecundity and fertility of S. littoralis exposed to residues of Du-Ter It is clear from the above mentioned discussion that feeding of moths of Du-Ter in sucrose solution resulted in higher degree of sterility than exposure of moths to residual film of the chemosterilant (Fig.). Opposite results were recorded by HARWALKAR et al (1971), studying the effect of Metepa on Phthorimueu operculella (Zeller). FAHMY and FAHMY (1960), reported that a compound may be potenially active as a chemosterilant, but many factors may diminish the extent of its activity in vivo.…”

Section: Resultsmentioning

confidence: 98%

Chemosterilant Effects of Du‐Ter on Adults of the Egyptian Cotton Leafworm, Spodoptera littoralis (Boisd.)

Elbadry

Elghar

Radwan

1972

Zeitschrift für Angewandte Entomologie

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Du‐Ter (triphenyl‐tin‐hydroxide) was evaluated on the Egyptian cotton leafworm, Spodoptera littoralis (Boisd.) by adult treatment. Sterilization of male and female moths with Du‐Ter was achieved by feeding and by exposure to residues deposited on a glass surface. The sterilizing effect was manifested as lowering in egg production as well as egg viability. When male moths were fed on 0.3 and 0.5% Du‐Ter in 10% sucrose solution, over a period of 12 hours, and mated to untreated females, 98.8 and 99.7% sterility was obtained. However feeding of females only gave rise to 85.6 and 94.4% sterility respectively. Exposure of moths for 12 hours to residual film of Du‐Ter resulted in a less degree of sterility. On the other hand, better results were obtained when males were exposed to residues and then paired to untreated moths than vice versa. The fecundity of treated females, and untreated females crossed with treated males was reduced. Longevity of both sexes was adversely affected by feeding or exposing moths to residues of the chemosterilant. Zusammenfassung Chemosterilations‐Wirkungen von Du‐Ter auf die Falter von Spodoptera littoralis (Boisd.) Mit dem Chemosterilant Du‐Ter (Triphenyl‐Zinn‐Hydroxid) bei Sp. littoralis konnte eine Sterilisation von ♂♂ + ♀♀ Faltern erzielt werden. Der Effekt zeigte sich sowohl in der Verminderung der Eizahl als auch in der Lebensfähigkeit der Eier. Bei Fütterung ♂♂ Falter mit 0,3–0,5% Du‐Ter in 10%iger Zuckerlösung, 12 Stunden lang, wurde nach Kopulation mit unbehandelten ♀♀ 98,8 und 99,7% Sterilität festgestellt. Dagegen wurde bei Fütterung von ♀♀ nur 85,6 und 94,4% Sterilität beobachtet. Die Darbietung von Du‐Ter 12 Stunden lang in Form des Kontakts mit einem dem Zuchtgefäß anhaftenden dünnen überzug ergab einen geringen Sterilisationseffekt. Wurden dagegen ♂♂ Falter dem überzug ausgesetzt und dann mit unbehandelten ♀♀ gepaart, verbesserten sich die Resultate. Die Fruchtbarkeit behandelter und unbehandelter ♀♀ wurde bei Paarung mit behandelten ♂♂ vermindert. Die Lebensdauer beider Geschlechter wurde durch Du‐Ter‐Behandlung beeinträchtigt.

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Section: Resultsmentioning

confidence: 98%

Chemosterilant Effects of Du‐Ter on Adults of the Egyptian Cotton Leafworm, Spodoptera littoralis (Boisd.)

Elbadry

Elghar

Radwan

1972

Zeitschrift für Angewandte Entomologie

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“…The potato moth, Phthorimaea operculella (Zeller), is a widespread pest of potatoes (CIE, 1968). It has been successfully sterilised with metepa in the laboratory Harwalkar et al, 1971) and also with thiotepa (Nabi, 1978). However, there are no published reports on the use of the sterile male technique with this pest in the field.…”

Section: Introductionmentioning

confidence: 99%

Field cage trials with thiotepa-sterilised males of the potato moth, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)

Nabi

1983

Bull. Entomol. Res.

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Males of Phthorimaea operculella (Zell.) less than 24 h old were sterilised with thiotepa by circulatory fumigation in the laboratory and then released in cages in a potato field in New Zealand. Laboratory-reared sterile males, normal males and females were released in different ratios. Sterile males competed successfully in mating to suppress reproduction between laboratory-reared normal males and females. Laboratory-reared sterile males were also released in different numbers into field cages containing the resident population and additional field-collected males and females. The results showed that the sterile males were slightly less competitive than normal ones, but they were effective in suppressing the population in the cages.

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Effect of thiourea on the histopathology and the reproductive performance of the male flesh fly Sarcophaga ruficornis (Fabr.)

Sharma¹,

Agarwal²,

Saxena³

1980

Pestic. Sci.

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When newly emerged and 24‐hour‐old male flesh flies Sarcophaga ruficornis (Fabr.) were fed on food containing 1.5% thiourea for 24 h, there was a small decrease in the size of the testes in both cases. Disturbance in spermatogenesis and histopathological damage were also observed in both cases. However, in the newly emerged flies the effect was mainly on secondary spermatocytes and spermatids, while in the others the effect was more pronounced on spermatogonia. The reproductive performance in respect of the production of larvae was considerably diminished in the newly emerged treated flies and was even further diminished in flies that were 24 h old when treated. The rate of adult emergence, however, remained unaffected for both kinds.

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Chemosterilization of Potato Tuberworm. 1. Effect of Metepa on the Fertility of Males12

Cited by 8 publications

References 0 publications

Chemosterilant Effects of Du‐Ter on Adults of the Egyptian Cotton Leafworm, Spodoptera littoralis (Boisd.)

Chemosterilant Effects of Du‐Ter on Adults of the Egyptian Cotton Leafworm, Spodoptera littoralis (Boisd.)

Field cage trials with thiotepa-sterilised males of the potato moth, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)

Effect of thiourea on the histopathology and the reproductive performance of the male flesh fly Sarcophaga ruficornis (Fabr.)

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