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Book The Use of Double Translocation Heterozygotes To Control Populations of the German Cockroach and the Use of Genetic Mechanisms and Behavioral Characteristics To Control Natural Populations of the German Cockroach

Download or read book The Use of Double Translocation Heterozygotes To Control Populations of the German Cockroach and the Use of Genetic Mechanisms and Behavioral Characteristics To Control Natural Populations of the German Cockroach written by Mary H. Ross and published by . This book was released on 1986 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research under Phase I was direct towards developing and testing double translocation heterozgotes as possible mechanisms for genetic control of the german cockroach. An initial laboratory experiment showed that releasing males carrying a single 2-chromosome translocation retarded but did not suppress population growth. Double translocations impart a higher genetic load. Their potential for suppressing and possbily eliminating infestations is substantially increased by an eggg case sterility effect, 'embryonic trapping'. During Phase II of the research shipboard roach population were studied. Estimates of population growth indicated that free populations developing under essentially optimal conditions would show a 20 to 26-fold increase in a 3-month period. Trapping data showed that: peaks of highest density in a thoroughly-trapped area best indicated the location of spot infestations; catch close to localized aggregations gave reasonably good indications of relative density; traps between spot infestations could not be used for density estimations; and that age class frequency in traps was unlike that in nearby infestations. Age class structure of rapidly-growing groups differed from that of groups where harborage availability limited growth. The last three shipboard experiments on the effects of propoxur treatment on populations established in known locations. The relationship between food and water consumption and female reproductive state was also studied. Studies on aggregation pheromone and a less well known dispersal pheromone revealed differences in response with age/sex class.

Book The Use of Double Translocations to Control Populations of the German Cockroach

Download or read book The Use of Double Translocations to Control Populations of the German Cockroach written by Mary H. Ross and published by . This book was released on 1979 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to conduct a field test of a unique type of sterility mechanism, embryonic trapping, for control of the German cockroach, Blattella germanica (L.). Trapping of viable embryos occurs when their number is reduced by genetic lethality to a point at which they are unable to force open the egg case at the time of hatch. Sterile egg cases occur frequently in matings of double translocation heterozygotes. Their frequency depends on the amount of lethality characteristic of the particular double. Using sex differences in lethality (chromosome disjunction) of certain single translocations, it has been possible to establish a crossing system for producing totally sterile double translocation-carrying males. One of the important points emerging from this year's study is that releases of sterile males may be very small indeed - certainly much smaller than a pre-cleanout population. Nevertheless, the sterile males are potentially capable of suppressing population growth or, if completely successful, of leading to the elimination of small residual populations.

Book The Use of Double Translocation to Control Populations of the German Cockroach

Download or read book The Use of Double Translocation to Control Populations of the German Cockroach written by Mary H. Ross and published by . This book was released on 1978 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique type of sterility, embryonic trapping, is an ancillary effect of high lethality in the German cockroach. Lethal effects, such as those characteristics of double translocation carrying males, may reduce the proportion of living embryos in an egg case to a point at which their combined strength is insufficient to force it open at the time of hatch. The overall goal was to test the effectiveness of this sterility mechanism in the control of shipboard and other German cockroach infestations. The first research objective involved procedures for sexing and identifying double males. Two hundred individuals were selected/hr. The size of the crossing systems needed to produce specific numbers of double males was also estimated. Objective 2 dealt with competitiveness studies. Unmated males remained competitive during the first month of adulthood, reaching a slight peak at ca 2 wks. Another series of experiments showed laboratory translocation strain males tended to out-compete males collected from the USS J F Kennedy. Objective 3 involved the choice of the particular double translocation stock for field tests. A new double, showing complete male sterility and high competitiveness, was chosen in preference to an older stock, T(3;7;12), which has lower sterility. Under Objective 4, a population experiment using releases of T(3;7;12) males into the Kennedy strain was initiated. Data, though incomplete, leave little doubt that releases into one generation of cockroaches will result in population suppression in the next.

Book Genetic Control of the German Cockroach

Download or read book Genetic Control of the German Cockroach written by Mary H. Ross and published by . This book was released on 1977 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book The Use of Genetic Mechanisms and Behavioral Characteristics to Control Natural Populations of the German Cockroach

Download or read book The Use of Genetic Mechanisms and Behavioral Characteristics to Control Natural Populations of the German Cockroach written by Mary H. Ross and published by . This book was released on 1981 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pilot field test of genetically-induced sterile male was concluded. The experimental design involved low-level releases of males carrying double translocations with the aim of eliminating or, at least inhibiting rapid re-growth of pockets of cockroaches left after routine insecticide treatment. The results were positive in that the males were easily introduced into natural groups, within which they competed well against wild-type males. However, it also became apparent that the effective use of these males would require a more thorough understanding of natural populations. The work conducted during the past year involved the initiation of some of these studies, along with preparation of data from the sterile-male experiment for publication.

Book Understanding and Controlling the German Cockroach

Download or read book Understanding and Controlling the German Cockroach written by Michael K. Rust and published by Oxford University Press, USA. This book was released on 1995 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: The German cockroach is considered to be the most significant insect pest of homes in many countries of the world. This book provides updated information about the biology and behaviour of this pest including taxonomy and distribution, morphology, and genetics. Effective strategies and the use of technology to control the pest are considered. There are more than 1,200 cited references which make this a comprehensive reference book.

Book Technical Abstract Bulletin

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Annals of the Entomological Society of America

Download or read book Annals of the Entomological Society of America written by and published by . This book was released on 1980 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book R   D Abstracts

    Book Details:
  • Author : Technology Reports Centre (Great Britain)
  • Publisher :
  • Release : 1981
  • ISBN :
  • Pages : 534 pages

Download or read book R D Abstracts written by Technology Reports Centre (Great Britain) and published by . This book was released on 1981 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Cytogenetics and Genetics of Vectors

Download or read book Cytogenetics and Genetics of Vectors written by Tōzō Kanda and published by Elsevier Science & Technology. This book was released on 1981 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Bibliography of Agriculture

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Bibliography of Agriculture with Subject Index

Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1971 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government reports annual index

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Sterile Insect Technique

Download or read book Sterile Insect Technique written by Victor A. Dyck and published by CRC Press. This book was released on 2021-01-06 with total page 1493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sterile insect technique (SIT) is an environment-friendly method of pest control that integrates well into area-wide integrated pest management (AW-IPM) programmes. This book takes a generic, thematic, comprehensive, and global approach in describing the principles and practice of the SIT. The strengths and weaknesses, and successes and failures, of the SIT are evaluated openly and fairly from a scientific perspective. The SIT is applicable to some major pests of plant-, animal-, and human-health importance, and criteria are provided to guide in the selection of pests appropriate for the SIT. In the second edition, all aspects of the SIT have been updated and the content considerably expanded. A great variety of subjects is covered, from the history of the SIT to improved prospects for its future application. The major chapters discuss the principles and technical components of applying sterile insects. The four main strategic options in using the SIT — suppression, containment, prevention, and eradication — with examples of each option are described in detail. Other chapters deal with supportive technologies, economic, environmental, and management considerations, and the socio-economic impact of AW-IPM programmes that integrate the SIT. In addition, this second edition includes six new chapters covering the latest developments in the technology: managing pathogens in insect mass-rearing, using symbionts and modern molecular technologies in support of the SIT, applying post-factory nutritional, hormonal, and semiochemical treatments, applying the SIT to eradicate outbreaks of invasive pests, and using the SIT against mosquito vectors of disease. This book will be useful reading for students in animal-, human-, and plant-health courses. The in-depth reviews of all aspects of the SIT and its integration into AW-IPM programmes, complete with extensive lists of scientific references, will be of great value to researchers, teachers, animal-, human-, and plant-health practitioners, and policy makers.

Book Applied Ecology Abstracts

Download or read book Applied Ecology Abstracts written by and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book WHO VBC

Download or read book WHO VBC written by World Health Organization. Vector Biology and Control Unit and published by . This book was released on with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt: