Download or read book Graduate School Degrees Conferred 1892 1948 written by University of Missouri. Graduate School and published by . This book was released on 1949 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by University of Missouri and published by . This book was released on 1949 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Effects of Pesticides on Non target Species written by David Pimentel and published by . This book was released on 1971 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications written by Pennsylvania State University. Agricultural Experiment Station and published by . This book was released on 1923 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pesticide Resistance in Arthropods written by Richard Roush and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bruce E. Tabashnik and Richard T. Roush Pesticide resistance is an increasingly urgent worldwide problem. Resistance to one or more pesticides has been documented in more than 440 species of insects and mites. Resistance in vectors of human dise8se, particularly malaria-transmit ting mosquitoes, is a serious threat to public health in many nations. Agricultural productivity is jeopardized because of widespread resistance in crop and livestock pests. Serious resistance problems are also evident in pests of the urban environ ment, most notably cockroaches. Better understanding of pesticide resistance is needed to devise techniques for managing resistance (Le. , slowing, preventing, or reversing development of resistance in pests and promoting it in beneficial natural enemies). At the same time, resistance is a dramatic example of evolution. Knowledge of resistance can thus provide fundamental insights into evolution, genetics, physiology, and ecology. Resistance management can help to reduce the harmful effects of pesticides by decreasing rates of pesticide use and prolonging the efficacy of environmentally safe pesticides. In response to resistance problems, the concentration or frequency of pesticide applications is often increased. Effective resistance management would reduce this type of increased pesticide use. Improved monitoring of resis tance would also decrease the number of ineffective pesticide applications that are made when a resistance problem exists but has not been diagnosed. Resistance often leads to replacement of one pesticide with another that is more expensive and less compatible with alternative controls.

Download or read book Pesticides in the Aquatic Environment written by United States. Environmental Protection Agency. Office of Water Programs and published by . This book was released on 1972 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biochemical Sites of Insecticide Action and Resistance written by Isaac Ishaaya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years many of the conventional methods of insect control by broad spectrum synthetic chemicals have come under scrutiny because of their unde sirable effects on human health and the environment. In addition, some classes of pesticide chemistry, which generated resistance problems and severely affected the environment, are no longer used. It is against this background that the authors of this book present up-to-date findings-relating to biochemical sites that can serve as targets for developing insecticides with selective prop erties, and as the basis for the elucidation of resistance mechanisms and countermeasures. The book consists of eight chapters relating to biochemical targets for insec ticide action and seven chapters relating to biochemical modes of resistance and countermeasures. The authors of the chapters are world leaders in pesti cide chemistry, biochemical modes of action and mechanisms of resistance. Biochemical sites such as chitin formation, juvenile hormone and ecdysone receptors, acetylcholine and GABA receptors, ion channels, and neuropeptides are potential targets for insecticide action. The progress made in recent years in molecular biology (presented in depth in this volume) has led to the iden tification of genes that confer mechanisms of resistance, such as increased detoxification, decreased penetration and insensitive target sites. A combina tion of factors can lead to potentiation of the resistance level. Classifications of these mechanisms are termed gene amplification, changes in structural genes, and modification of gene expression.

Download or read book Pesticide Usage and Its Impact on the Aquatic Environment in the Southeast written by United States. Environmental Protection Agency. Office of Water Programs and published by . This book was released on 1972 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Training Course written by United States. Environmental Protection Agency. Division of Pesticide Community Studie and published by . This book was released on 1971 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by Donald Elisha Harding Frear and published by . This book was released on 1937 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Noctuidae of Pennsylvania written by Charles Aubrey Thomas and published by . This book was released on 1936 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by Pennsylvania State University. Agricultural Experiment Station and published by . This book was released on 1937 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by and published by . This book was released on 1937 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 50th Annual Report of the Pennsylvania Agricultural Experiment Station for the Fiscal Year Ended June 30 1937 written by Arthur Wesley Clyde and published by . This book was released on 1937 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Use of Pesticides in Suburban Homes and Gardens and Their Impact on the Aquatic Environment written by Rosmarie Von Rumker and published by . This book was released on 1972 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Predators and Parasitoids written by Opender Koul and published by CRC Press. This book was released on 2003-03-13 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Their natural enemies largely determine the population size and dynamic behavior of many plant-eating insects. Any reduction in enemy number can result in an insect outbreak. Applied biological control is thus one strategy for restoring functional biodiversity in many agroecosystems. Predators and Parasitoids addresses the role of natural enemies i

Download or read book Natural History of the Ground Squirrels of California written by Joseph Grinnell and published by . This book was released on 1918 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: