Download or read book Bracon Lissogaster Mues written by Harry W. Somsen and published by . This book was released on 1956 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Description and Biology of Bracon Lissogaster a New Parasite of the Wheat Steam Sawfly written by Kenneth Bradshaw Maughan and published by . This book was released on 1951 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress. Cataloging Policy and Support Office and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress and published by . This book was released on 2013 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bracon Lissogaster Mues written by H. W. Somsen and published by . This book was released on 1956 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Bulletin written by and published by . This book was released on 1956 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress and published by . This book was released on 1997 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hymenoptera of America North of Mexico written by and published by . This book was released on 1951 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hymenoptera of America North of Mexico written by United States. Entomology Research Division and published by . This book was released on 1958 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agriculture Monograph written by and published by . This book was released on 1958 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hymenoptera of America North of Mexico written by Karl V. Krombein and published by . This book was released on 1958 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Control Programmes in Canada 2001 2012 written by Peter G Mason and published by CABI. This book was released on 2013-10-21 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Canada is a world leader in biological control research. Reporting the status of biocontrol agents released in Canada over the last decade, this book presents case studies by target pest that evaluate the impact of biocontrol and recommend future priorities. In addition to a new chapter on future targets and an appendix listing established agents, this edition contains information of interest to a global audience, and chapters that address effects of invasive species and climate change.

Download or read book Subject Heading List written by National Agricultural Library (U.S.) and published by . This book was released on 1963 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Subject Heading List Preliminary Edition written by National Agricultural Library (U.S.) and published by . This book was released on 1963 with total page 1236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress. Office for Subject Cataloging Policy and published by . This book was released on 1992 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A E written by Library of Congress. Office for Subject Cataloging Policy and published by . This book was released on 1990 with total page 1548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavioral and Sensory Responses of Endemic Braconid Parasitoids to Changes in Volatile Emissions Induced by Wheat Stem Sawfly Cephus Cinctus Herbivory written by Oscar Gerardo Pérez and published by . This book was released on 2009 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bracon cephi (Gahan) and Bracon lissogaster Muesebeck are considered the most effective biological control agents of the wheat stem sawfly, Cephus cinctus Norton, probably the most serious wheat insect pest in the northern Great Plains of North America. The great difficulty in controlling this pest suggests an urgent need to improve our understanding of the chemical ecology of these parasitoids to enhance effective control of this pest. Chemical ecology has been demonstrated to be an effective tool in the control of important pests. Plants produce volatile compounds as defenses against herbivory. These compounds play an important role in host selection by herbivores and their natural enemies. Studies revealed that wheat plants infested by C. cinctus produce different amounts of specific compounds compared to uninfested plants. Synthetic compounds matching those produced by sawfly infested wheat plants were tested in three different concentrations against males and females B. cephi and B. lissogaster parasitoids using an electroantennogram system. Six compounds generated positive electrophysiological responses from the parasitoid antennae. Behavioral bioassays using the previous responsive compounds determined that three compounds were attractive to parasitoids of both sexes. To better understand parasitoid host seeking, it was important to quantify and determine the spatial distribution of these behaviorally active compounds as they were emitted from wheat plants. Volatile compounds were collected from infested and uninfested wheat plants at three different heights and two distances in the greenhouse. Greater amounts were collected from the infested plants immediately adjacent to the base of the plants. Field studies were performed to compare concentrations of volatile compounds between areas of heavy and light sawfly infestation. Greater amounts of behaviorally active volatile compounds were collected from areas of heavier sawfly infestation. In conclusion, results show that chemical ecology is a valuable tool in better understanding host seeking in this tritrophic system. This new information on volatile production and dispersal by sawfly infested plants and host seeking behavior of these parasitoids establishes the basis for future exploration of optimal blends of behaviorally active compounds used by parasitoids in host seeking, which may allow for more effective control of the wheat stem sawfly.