The present invention relates to botanical pesticides for agricultural and horticultural crops and more specifically to a pesticidal composition comprising Adenanthera pavonina as the prime ingredient exhibiting synergism with other ingredients of the composition. The present invention further relates to the process of preparing eco friendly and environs safe botanical pesticide for controlling pests in agriculture and horticulture crops. Specifically the invention relates to botanical pesticides containing no level or substantially lower levels of chemicals. More specifically, the present invention provides for a process of preparing botanical pesticides that are relatively inexpensive to prevent pests in agriculture and horticulture crops.