This book has been prepared to provide a broad exposition on the science and technology for improvement of crop for yield, insect, productivity and disease resistant, this research book is provided the knowledge of graduate and post graduate level students, how can improved and preparation of hybrids and utilization of hybrid vigours. There are several books especially of foreign authors on these crops. However, the research syllabi of Indian Universities are not covered by any single source. Moreover, books of foreign rarely cover. The prime objective of writing the present book "Heterosis in bottle gourd" is to help Indian researcher and student also.