Abstract
A method for maintaining anin vivo culture ofEntomophthora muscae (C) Fres. on its original host, adult carrot flies (Psila rosae F.), is described. The lethal time for adult carrot flies was greatly influenced by temperature, both for infected and for uninfected flies. In the range 8.2°C–20.2°C the LT50 for infected flies was about 5.4 times shorter than the estimated average life-span for uninfected flies. The discharge of primary spores was also strongly dependent on temperature. The total number of primary spores discharged per fly at 100% RH and in darkness ranged between 1.2×104 and 9.6×104 with a mean of 5.1×104.
Zusammenfassung
Eine Methode für einein vivo Kultur vonE. muscae wird beschrieben. Die Nahrung der Pilzkultur bestand aus ihrem natürlichen Wirt, erwachsene Möhrenfliegen (P. rosae). Die Lebensdauer der erwachsenen Möhrenfliegen hängt im hohen Mass von der Temperatur ab, sowohl was infizierte als uninfizierte Fliegen betrifft. Im Interval von 8.2°C–20.2°C war die LT50 für infizierte Fliegen etwa 5.4 mal kürzer als die durchschnittliche Lebensdauer (“LT50”) für uninfizierte Fliegen. Das Abschleuderung der Primärsporen zeigte auch eine starke Temperaturabhängigkeit. Die totale Anzahl von Primärsporen pro Fliege in 100% RH und Dunkelheit abgeschleudert, lag zwischen 1.2×104 und 9.6×104 und Betrug im Mittel 5.1×104.
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References
Brobyn, P. — 1982. Host invasion and conidium production byEntomophthora muscae. — IIIrd. Int. Coll. Invertebr. Pathol., 6–10 Sept., 1982, Brighton, 225.
Carruthers, R. I. &Haynes, D. L. — 1984. Laboratory transmission andin vivo incubation ofEntomophthora muscae [Entomophthorales: Entomophthoraceae] in the onion fly,Delia antiqua [Diptera: Anthomyiidae]. —J. Invertebr. Pathol., 45, 282–287.
Cohn, F. — 1985.Empusa muscae und die Krankheit der Stubenfliegen. Ein Beitrag zur Lehre von den durch parasitische Pilze characterisierten Epidemiien. —Nov. Actorum Acad. Caes. Leop.-Carol. German. Nat. Cur., 25, 299–360.
Eilenberg, J. — 1985. Relationships between the carrot fly [Psila rosae F.] and its fungal pathogens from Entomophthorales, particularlyEntomophthora muscae (C.) Fres. —Ph. D. Thesis, Dept. Zool., Royal Vet. Agric. Univ., Copenhagen, 109 pp.
Holdom, D. — 1986. Moisture requirements and field occurrence ofEntomophthora planchoniana Cornu. In: Pest control: recent advances and future prospects. (Bailey, P. ed.). —Proc. Fourth Austr. Entomol. Res. Conf., Adelaide, 24–28 Sept., 1984, 368–374.
Keller, S. — 1984.Entomophthora muscae als Artenkomplex. —Mitt. Schweiz. Entomol. Ges., 57, 131–132.
Kramer, J. P. — 1980a. The house-fly mycosis caused byEntomophthora muscae: Influence of relative humidity on infectivity and conidial germination. —J. New-York Entomol. Soc., 88, 236–240.
Kramer, J. P. — 1980b.Entomophthora muscae — moisture as a factor affecting its transmission and conidial germination. —Acta Mycologia, 16, 133–139.
Kramer, J. P. &Steinkraus, D. C. — 1981. Culture ofEntomophthora muscae in vivo and its infectivity for six species of muscoid flies. —Mycopathologia, 76, 139–143.
MacLeod, D. M., Müller-Kögler, E. &Wilding, N. — 1976.Entomophthora species withE. muscae-like conidia. —Mycologia, 68, 1–29.
Millstein, J. A., Brown, G. C. &Nordin, G. L. — 1982. Microclimatic humidity influence on conidial discharge inErynia sp. [Entomophthorales: Entomophthoraceae], an entomopathogenic fungus on the alfalfa weevil [Coleoptera: Curculionidae]. —Environ. Entomol., 11, 1166–1169.
Milner, R. J. — 1981. Patterns of primary spore discharge ofEntomophthora spp. from the blue green aphid,Acyrtosiphon kondoi. —J. Invertebr. Pathol., 38, 419–425.
Mullens, B. A. — 1985. Host age, sex, and pathogen exposure level as factors in the susceptiblity ofMusca domestica toEntomophthora muscae. —Entomol. Exp. Appl., 37, 33–39.
Mullens, B. A. &Rodriguez, J. L. — 1985. Dynamics ofEntomophthora muscae [Entomophthorales: Entomophthoraceae] conidial discharge fromMusca domestica [Diptera: Muscidae] cadavers. —Environ. Entomol., 12, 1344–1349.
Rudemo, M. — 1979. Statistik og sandsynlighedslaere med biologisk anvendelse I & II. —DSR, Copenhagen, 251 & 202 pp.
Städler, E. — 1971. An improved mass-rearing method of the carrot fly,Psila rosae [Diptera: Psilidae]. —Can. Entomol., 103, 1033–1038.
Wilding, N. — 1969. Effect of humidity on the sporulation ofEntomophthora aphidis andE. thaxteriana. —Trans. Br. Mycol. Soc., 53, 126–130.
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Eilenberg, J. The culture ofEntomophthora muscae (C) Fres. in carrot flies (Psila rosae F.) and the effect of temperature on the pathology of the fungus. Entomophaga 32, 425–435 (1987). https://doi.org/10.1007/BF02372452
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DOI: https://doi.org/10.1007/BF02372452