The biological ways in which diseases of plants, caused by pathogenic microbes can be controlled without the use of chemical pesticides is the subject of this book. The basis of biocontrol (in microbiology, ecology, and plant pathology) is described and many examples of control measures in commercial use or development are given. There is increasing interest in biocontrol from the general public, environmentalists and the major world agrochemical companies, and this easily read text presents recent developments in the subject. The book provides the necessary references and literature...

The Stirling Psychology of Language Conference was held in the University of Stirling, 21-26 June 1976. 250 people attended the conference and 70 papers were presented. The two volumes of Pro ceedings present a selection of papers from the conference reflect ing as far as possible the range of topics that were discussed. Volume 1 is concerned exclusively with language acquisition. In recent years the 'centre of gravity' of acquisition research has shifted from syntactic and phonological description to the amor phous domains of semantics and pragmatics. This shift is reflected in the two large...