In this update of the 1983 reference-cum-textbook, a weed science consultant illuminates a field applying new technology to meet the challenges of the emergence of weeds resistant to herbicides, shifts in weed flora, and concerns about the safety of herbicides. Chapters feature advances in genetic engineering and biological approaches to managing out-of-place plants, as well as basic principles. Includes a glossary and appendices on weed names and herbicide information. Originally an agronomist from India, Rao now lives in Santa Clara, CA. Annotation c. Book News, Inc., Portland, OR (booknews.com)