Genetic Control of the German Cockroach.
Abstract
The authors investigated the possibility of controlling the German cockroach, Blattella germanica, by using chromosome translocations. The first objective involved study of wild-type laboratory and field populations. The origin, hatch, and development of nymphal groups that determine the growth and age structure of a laboratory population were analyzed. Properties of 9 single translocations were studied under Objective 2. Eight showed good competitiveness, 1 marginal, and 1 poor. Eight were established in backcross systems to closely linked markers. Single translocations retarded but did not suppress population growth. The authors found that the sterility effect, embryonic trapping, that is used in population suppression by double translocations is due to a reduction in the numbers of viable embryos/ootheca. The frequency of sterile egg cases increases sharply at lethalities of 60-80%, with complete sterility at lethalities of 80% or better. They conclude that double translocations are the most effective method of using translocations for control in B. germanica. Such mechanisms are potentially capable of reducing field populations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 17, 1977
- Accession Number
- ADA049016
Entities
People
- Donald G. Cochran
- Mary H. Ross
Organizations
- Virginia Tech