Accession Number : AD0764082

Title :   Muscoid-fly Octosporeosis.

Descriptive Note : Rept. no. 2 (Annual) 1 Aug 72-31 Jul 73,

Corporate Author : CORNELL UNIV ITHACA NY DEPT OF ENTOMOLOGY

Personal Author(s) : Kramer, John P.

Report Date : AUG 1973

Pagination or Media Count : 6

Abstract : The research project has as its goal an understanding of how Octosporea muscaedomesticae (Protozoa: Microsporidia) might be manipulated in the applied biological control of noxious muscoid flies. Studies center around an investigation of differential germination in spores; the isolation of a strain of the pathogen with increased virulence; and, the identification of the effects of pH on spores survival in an aqueous medium and the effects of host diet on pathogen proliferation. By monitoring the changes in a population of spores as it passed through the alimentary tracts of flies it was found that all spores do not germinate during the first passage as is generally thought. A knowledge of this fact is vital to the interpretation of dosage and mortality studies. The LT-50 has been reduced to nine days in the selected strain of the pathogen. Spores can tolerate a rather wide range of pH values (2.5 to 9.6) with little or no loss of infectivity, and host diet does not appreciably influence proliferation of the pathogen. (Author)

Descriptors :   *PROTOZOA, *DIPTERA, *INSECT CONTROL, ENTOMOLOGY, PARASITES, SPORES, GERMINATION.

Subject Categories : Hygiene and Sanitation

Distribution Statement : APPROVED FOR PUBLIC RELEASE