Autor: A. Verma

This book presents a series of research essays on the state of unions in many different parts of the world. Written by leading researchers in the field it provides insights into the causes of union d …

Contents: Foreward, Preface, Yellows type of diseases-distribution, identity and importance, White leaf, Diseases of trees caused by mycoplasma-like organisms in China, Occurrence yellows and its occ …