Electroantennogram responses of <i>Zabrotes subfasciatus</i> to odours of the sexual partner

Pimbert, Michel; Pouzat, J.

doi:10.1111/j.1570-7458.1988.tb02281.x

Cited by 14 publications

(6 citation statements)

References 13 publications

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“…The peak of oviposition normally occurs on the second or third day after adult emergence assuming that mates and suitable host seeds are available continuously (Howe & Curfie, 1964;Meik & Dobie, 1986)) but Utida (1967) found that oviposition began shortly after emergence and that 30-40~o of all eggs were laid during the first day of adult life. The former observations are more readily compatible with the work of Pimbert and Pouzat (1988) who determined that females only release a sexually attractant pheromone when they are more than 2 days old. Reported rates of development from oviposition to adult emergence from the host seed vary from around 34 days recorded by Cardona et al (1989) to figures as low as 27 days under the same conditions, 27 ~ and 70~o R.H. (see Howe & Currie, 1964).…”

Section: Introductionsupporting

confidence: 82%

Development, fecundity and egg dispersion of Zabrotes subfasciatus

Dendy

Credland

1991

Entomologia Exp Applicata

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Zabrotes subfasciatus Boh. (Coleoptera: Bruchidae) is the smallest of the bruchids commonly infesting stored legume seeds, yet its wild and cultivated hosts, Phaseolus lunatus and P. vulgaris, have large seeds. It is demonstrated that the maximum fecundity of females is around 55 eggs which are aggregated onto some of the available hosts. About 80% of the eggs normally hatch and development at 27 °C and 70% relative humidity takes around 34 days. The sex ratio of emerging adults is slightly biased towards males. About 75% of the larvae in a seed produce adults at low and moderate initial densities and up to 20 adults can emerge from a single seed. Adult weight is not influenced by the initial larval density in the seed but there is a strong correlation between the weight of females at emergence and their fecundity. These results are considered in the light of existing knowledge of Z. subfasciatus, much of which is apparently contradictory or inconsistent. Many of these difficulties are resolved and it is demonstrated that the behaviour and bionomics are well adapted to the normal situation in which the beetle is found and that the differences between this species and other bruchids are explicable in this context.

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Section: Introductionsupporting

confidence: 82%

Development, fecundity and egg dispersion of Zabrotes subfasciatus

Dendy

Credland

1991

Entomologia Exp Applicata

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“…La technique utilis6e a 6t6 d6crite pr6c6demment (Pouzat, 1974;Pimbert & Pouzat, 1988). Deux tests sont r6alis6s quotidiennement: en d6but et en fin de scotophase.…”

Section: Materiels Et M~thodesunclassified

“…Electrophysiologie. La technique utilis6e a 6t6 d6crite pr6c6demment (Pouzat, 1974;Pimbert & Pouzat, 1988). L'61ectrode indiff6rente est un fil d'argent chlorur6 plac6 dans le thorax d'un male maintenu, intact, en contention.…”

Section: Materiels Et M~thodesunclassified

“…Des ph6romones sexuelles femelles ont 6t6 rnises en 6vidence chez des col6opt6res (Barak & Burkholder, 1977;Hammack & Burkholder, 1981). Chez les Bruchid6s, les femelles de Callosobruchus maculatus (Rup & Sharma, 1978;Qi & Burkholder, 1982;Bilal, 1987), C. chinensis (Honda & Yamamoto, 1976), C. analis (Cork et al, 1991), Bruchidius atrolineatus (Nammour et al, 1988) et Zabrotes subfasciatus (Pimbert & Pouzat, 1988) 6mettent une ph6romone sexuelle volatile.…”

Section: Introductionunclassified

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Existence d'une phéromone sexuelle chez Caryedon serratus: attractivité des femelles et réactivité des mâles

Chaibou

Pierre

Biemont

et al. 1993

Entomologia Exp Applicata

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Les femelles de Caryedon serratus (O1.) produisent, pendant la scotophase, une ph6romone sexuelle volatile qui d6clenche chez les males une ch6moan6motaxie positive. Les effets de l'~ge sur rattractivit6 des femelles et sur la r6activit6 des males ont 6t6 6tudi6s. Plus de soixante-dix pour cent des mgtles commencent ~ r6agir ~t la ph6romone sexuelle d+s les premi+res 24 heures qui suivent leur 6mergence. Une seule femelle sur 31 a 6t6 attractive ~t cet ~tge. A 48 heures, le pourcentage des femelles attractives est de 38,7 ~o. I1 existe une variabilit6 inter et intra femelles dans la production de ph6romone sexuelle (d6but, r6gularit6).L'existence des r6cepteurs antennaires ~t la ph6romone sexuelle chez le m~tle est montr6e par des 6tudes 61ectrophysiologiques (EAG). La variabilit6 de la production de ph6romone sexuelle est discut6e.

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“…The existence of female-produced sex pheromones in other Bruchidae has been shown in Callosobruchus maculatus (Rup & Sharma, 1978;Qi & Burkholder, 1982). Cchinensis (Honda & Yamamoto, 1976) and Zabrotes subfasciatus (Pimbert & Pouzat, 1988). In Acanthoscelides obtectus, another bruchid species, the sex pheromone is produced by the males (Horler, 1970;Pouzat, 1974).…”

Section: Introductionmentioning

confidence: 97%

Electrophysiological investigations of sex pheromone reception and release in Bruchidius atrolineatus

Pouzat

Ibeas

1989

Physiological Entomology

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ABSTRACT. Male antennal sensitivity to female sex pheromone in Bruchidius atrolineatus was investigated electrophysiologically (EAG). The existence of receptors for this pheromone was shown in the antennae of males. (No such receptors exist in the antennae of females.) Young (age < 24h) males gave an EAG of amplitude 25–30% of the response of older males. Diapausing males several days old gave a much smaller response than active males of the same age. EAGs were used to test the production/release of pheromone by groups of twenty females. Before they are 24 h old, active females do not produce/release the pheromone; older females release it at an almost constant rate. Sexually diapausing females do not produce and/or release the sex pheromone. In sexually active females, mating inhibits pheromone release almost immediately. There is a correlation between reproductive status of the females (development of ovaries, oogenesis) and the production or release of the pheromone. A corresponding correlation also exists in the males whose antennae show a very low sensitivity when they are young or when they are in reproductive diapause.

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Electroantennogram responses of Zabrotes subfasciatus to odours of the sexual partner

Cited by 14 publications

References 13 publications

Development, fecundity and egg dispersion of Zabrotes subfasciatus

Development, fecundity and egg dispersion of Zabrotes subfasciatus

Existence d'une phéromone sexuelle chez Caryedon serratus: attractivité des femelles et réactivité des mâles

Electrophysiological investigations of sex pheromone reception and release in Bruchidius atrolineatus

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