Studies on the Systematic Uptake of Toxic Phosphorus Esters by Plants - Phytotoxic Effects of Soil Applications of the Organophosphorus Insecticides Mevinphos and Methyl Demeton on Selected Plant Species


Book Description

Data relating the tolerance of agronomic plants to soils contaminated with high concentrations of organophosphorus insecticides may emphasize the need for decontaminating soils following accidental spillage. The insecticides 2- carbomethoxyl-1-methylvinyl dimethyl phosphate (mevinphos) and a mixture of the two isomers 0,0-dimethyl S-(2-(ethylthio) ethyl) phosphorothioate and 0,0- dimethyl 0-(2-(ethylthio) ethyl) phosphorothioate (methyl demeton) were soil applied to 15 economically important plants at the rate of 100, 200, 400, and 800 pounds active ingredient per acre. The separate statistical analysis of the several days (1, 3, 7, and 10) on which measurements (damage ratings) were taken indicated that the effects of damage were clearly manifested by the seventh day. By the seventh day the average observed damage caused by mevinphos (all plants averaged) was slight to moderate while damage caused by methyl demeton was moderate to heavy. The 15 plant species could be divided into eight groups on the basis of similar phytotoxic responses to the insecticides. The most susceptible plants to soil drench applications were oats, wheat, collards, tomatoes, and sorghum.







Toxic Phosphorus Esters


Book Description

Toxic Phosphorus Esters: Chemistry, Metabolism, and Biological Effects aims to become a source book on organophosphate research and show how the understanding of the events following organophosphate poisoning of animals can be understood in terms of events at the molecular level. The manuscript first offers information on nonenzymic reactions and the reaction with cholinesterase in vitro. Discussions focus on hydrolysis, isomerization, oxidation, phosphorylation of the enzyme, and selectivity for different cholinesterases. The text then examines enzymic degradation and activation in vitro, effects in mammals, and effects on isolated whole tissues. The publication ponders on the effects in insects and plants, including results of poisoning, metabolism, resistance, antagonism and synergism, and phytotoxicity. The text also reviews selective toxicity, as well as excretion and storage, metabolism, design of new selective compounds, and nature of the target. The manuscript is a dependable reference for readers interested in the composition, reactions, and effects of toxic phosphorus esters.




Toxicology of Organophosphate and Carbamate Compounds


Book Description

This text/reference book provides the most comprehensive coverage of anticholinesterase compounds (Organophosphates and Carbamates), which constitute the largest number of chemicals that are primarily used as insecticides in agriculture, industry, and around the home/garden. Some OPs (nerve agents) have been used in chemical warfare and terrorist attacks, while some OPs and CMs have been recommended as therapeutic agents in human medicine as well as in veterinary medicine. Many chemicals of both classes are extremely toxic and lack selectivity, thus their inadvertent/accidental use continues to pose a threat to human and animal health, aquatic systems and wildlife. These anticholinesterase agents produce a variety of toxicological effects in target and nontarget organs. In light of this complexicity, this multi-authored book is written by the well known scientists from many countries. The book is organized into nine sections, with a total of 49 chapters, to provide in-depth knowledge on various aspects of OP and CM compounds, including their use, classification, mechanism-based toxicity, and prophylactic and therapeutic measurements. Several chapters are written with special emphasis to cover timely topics, such as chemical warfare agents, physiologically-based pharmacokinetic modeling, structure and function of cholinesterases, paraoxonase, carboxylesterases; developmental neurotoxicity, the intermediate syndrome, oxidative stress, endocrine disruption, and DNA damage/gene expression and carcinogenesis. Section-VI with 5 chapters is specifically devoted to risk assessment, and safety and regulatory guidelines for pesticides. - Describes everything you need to know about Organophosphates and Carbamates - Extensively covers pesticides, nerve agents, therapeutic drugs, and flame retardants - Describes epidemiology of the world's major disasters involving Organophosphates and Carbamates - Covers animal, human, aquatic, and wildlife toxicity of Anticholinesterases - Insights into in-depth cholinergic and noncholinergic mechanisms of toxicity - Describes recent advancements in cholinesterases, paraoxonases, carboxylesterases, oxidative stress, endocrine disruption, cardiac and pulmonary toxicity, and carcinogenesis - Provides in vitro and in vivo models for neurotoxicity testing - Integrates knowledge of studies in lab animals and humans - Offers risk/safety assessment and national/international guidelines for permissible levels of pesticide residues - Describes management of Anticholinesterase poisoning in humans




Chemistry of Pesticides


Book Description

This book was originally published as a Russian edition in mid-1968. It represented the first single-volume discussion of chemical pest control and of the detailed chemistry.of all modern pesticide chemicals since D. E. H. Frear's classical book on this same subject, first published in 1942 (van No strand) with the latest (third) edition in 1955. Since 1955 many new pesti cide chemicals have achieved commercial status, and many of the older ones have been supplanted. There is no up-to-date equivalent of this present volume in the world literature, with the exception of the encyclopedic and largely biologically oriented two-volume work "Chemie der Pflanzenschutz und Schadlingsbekampfungsmittel" (R. Wegler, ed.) published by Springer Verlag in 1970. Professor Melnikov has updated the 1968 Russian edition, with emphasis on the primary Russian sources yet with excellent world wide coverage of the latest chemicals to approach field stature in modern chemical pest control, for the present translation."




Sustainable Agrochemistry


Book Description

This book presents a broad range of technologies for sustainable agrochemistry, e.g. semiochemicals for pest management, nanotechnology for release of eco-friendly agrochemicals, and green chemistry principles for agriculture. It provides a concise introduction to sustainable agrochemistry for a professional audience, and highlights the main scientific and technological approaches that can be applied to modern agrochemistry. It also discusses various available technologies for reducing the negative impacts of agrochemicals on the environment and human health.




Environmental Security Assessment and Management of Obsolete Pesticides in Southeast Europe


Book Description

The present work is a fine contribution to the broad field of environmental security in the context of risk assessment and management of obsolete pesticides for the region of Southeast Europe. The purpose of this book is to evaluate the existing knowledge of improper disposal of obsolete pesticides in the region, to estimate the associated impact on environmental health, and to develop recommendations to mitigate or eliminate threats posed to the environment, biodiversity and human life. The issues discussed in the book include: reviews of the transport and fate of pesticides and associated contaminated materials in different environmental media and identification of the principal sources, emission routes and patterns of environmental pollution with pesticides; a recognition of the most suitable methods for environmental sampling analysis and sample preparation; an evaluation of the current methods and techniques for chemical and mass analysis of environmental and biological samples and discussion of the metrological and quality aspects of trace analyses; a characterization of the environmental and human health impacts of pesticide pollution, the health effects associated with acute and chronic exposure and the use of epidemiological data for risk assessment; a revision of the existing chemical safety regulations and strategies for protection and management of obsolete pesticide stocks; a survey of the international conventions, directives and standards concerning pesticide use.










Pesticides in Urban Environments


Book Description

Proceedings of a symposium held in San Francisco in April 1992. The urban environment discussed includes homes, yards, gardens, public parks, golf courses, and restaurants. Some common products for the urban market are turf pesticides, termiticides, home and garden pesticides, indoor pesticides, and rodenticides. The papers are divided into five sections, each focusing on a different facet of urban pesticide use: pests and pesticides, dissipation of pesticides, mobility of pesticides, urban pesticides and humans, and urban pesticides and nontarget animals. Annotation copyright by Book News, Inc., Portland, OR