Accession Number:

ADA045404

Title:

Genetics of the Encephalitis Vector, 'Culex tarsalis' for Possible Application in Integrated Control.

Descriptive Note:

Annual rept. Apr 76-May 77,

Corporate Author:

CALIFORNIA UNIV BERKELEY DIV OF ENTOMOLOGY AND PARASITOLOGY

Personal Author(s):

Report Date:

1977-05-30

Pagination or Media Count:

26.0

Abstract:

The projects here reported represent part of an overall program designed to change Culex tarsalis genetically to inhibit its propagation in nature, and to render it less effective as a vector of disease. A resume of progress for the year 1976-77 is as follows The number of maintained strains for genetic studies was increased. Multiple-marker strains for genetic studies and identification of translocations increased to 7. Among the translocation strains that show promise are 9 sex-linked, 3 autosomal. Two sex-linked are multiples, involving all 3 chromosomes. Two autosomes are in homozygous condition. A sex-linked multiple translocation strain was studied for competitiveness in laboratory and large-outdoor cages. Computer models were used to determine number of males released this spring in pilot study. A mass-production program successfully produced 100,000 males over a predetermined time period. In vector competence studies, a refractory strain was successfully selected. Genetic studies determined that susceptibility to WEE virus was dominant and controlled by more than 1 gene.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE