Successful cultivation of crops is hampered due to the occurrence of several aspects like minerals, fertilizers, water stress, insect pests, diseases, nematodes and others. This is a very multifaceted issue in view of the tropical and sub-tropical climate. Therefore, intensive cultivation of high yields varieties/hybrids under high fertility, off-season production, lack of adequate knowledge on plant nutrition and protection, economic constraints to maximize qualitative returns and inability to afford risk. Many technologies using, micropropogate sets, trap crops, botanicals and bio-controls have been developed in some crops and a few are validated in farmers' field. The information on climatic factors, minerals, mutation breeding, cultivation practices, micropropogation, biochemical marker, pests, diseases and nematodes on crops is very much spread. There is no book at present which comprehensively and exclusively deals with the above aspects on crops. The present book deals with integrated pest, disease, nematode management, regulatory, physical, cultural, chemical, organic amendments, biological, host plant resistance and integrated methods. This book is a useful reference to students, forthcoming researchers, extension workers and policy makers. The book can also be used for teaching undergraduate and postgraduate courses as well.