Accession Number : AD0785871

Title :   Muscoid-Fly Octosporeosis.

Descriptive Note : Final rept. 1 Aug 71-31 Jul 74,

Corporate Author : CORNELL UNIV ITHACA NY DEPT OF ENTOMOLOGY

Personal Author(s) : Kramer, John P.

Report Date : 01 AUG 1974

Pagination or Media Count : 8

Abstract : Some general properties of Octosporea muscaedomesticae spores that bear upon their ability to withstand extra-corporeal stressors were investigated. It was demonstrated that: spores can tolerate ph 2.5 to 9.6 in an aqueous medium; withstand high X-irradiations (6000 and 10,000R) with little effect on their infectivity; be deactivated by ultraviolet irradiation within 60 minutes; in an aqueous medium withstand the effects of high temperature (65C) for at least two hours; in a clear aqueous medium held at 5C retain their infectivity for at least two years; held in host tissues at -20C remain infective for at least six months; at room conditions spores are viable for only eight months. It was also demonstrated that some spores do not germinate during their first passage through the alimentary tract of a fly. By selection based upon death time of the host, it was demonstrated that a strain of O. muscaedomesticae with increased fly-killing powers can be developed. (Modified author abstract)

Descriptors :   *PROTOZOA, *SPORES, *DIPTERA, *INSECT CONTROL, STABILITY, ENTOMOLOGY, STRESS(PHYSIOLOGY), GERMINATION.

Subject Categories : Biochemistry
      Pesticides Pollution and Control
      Hygiene and Sanitation

Distribution Statement : APPROVED FOR PUBLIC RELEASE