It is my pride to express my sincere gratitude and profound appreciation to Professor Dr. Durga Mani Gautam, Department of Horticulture, IAAS, Rampur for his invaluable guidance, suggestions, support, constant encouragement and continuous cooperation throughout the entire course of the investigation and his constructive comments and assistance for preparing this dissertation. I extend my heartiest sense of admiration and gratitude to the members of my advisory committee, Prof. Dr. Moha Dutta Sharma (Department Horticulture), IAAS, Prof. Dr. Resham Bahadur Thapa (Department of Entomology),...