Various predators, parasitoides and pathogens cause natural suppression (natural biological control) of insect pests of different vegetable crops particularly eggplant/brinjal, tomato, cabbage, cauliflower, chilli, potato, lady’s finger etc. Among the different predator’s lady bird beetles play an important roll in the natural suppression of destructive insect pest’s viz., jassid/leaf hopper, aphid, thrips, whitefly, mites and many other small soft bodied insect pests and eggs of many insect pests. Coccinella sp., an important lady bird beetle in the Gangetic plains under the foothill of the Himalayan range so called terai region of West Bengal, India was found very active, feeding on different insect pests of eggplant/brinjal and other vegetable crops throughout the year. The level of population varied from year to year, season to season depending on their host range and prevailing climatic conditions. It is found that initially its population was recorded higher during March-April and then declined. Highest average population (4.87 Coccinella/plant) was recorded in terai region of West Bengal, India during March (11th standard week) when the mean temperature, mean relative humidity and weekly rainfall were 23.8 °C, 74.2% and 8.2 mm respectively. Coccinella incidence showed significant positive correlation (p= 0.05) with maximum temperature and significant negative correlation with maximum, minimum and mean relative humidity whereas with minimum and mean temperature and rainfall the correlation was negative but non-significant. The population of Coccinella was found throughout the growing period of lady’s’ finger feeding on destructive pests. In the kharif season, population was found higher (3.5/plant) during 3rd and 4th week of July in active vegetative growth of the crop. In early stage of crop growth different insect pests on vegetable crops can be controlled with protective synthetic insecticides but cause harmful effect to the bio-agents and causes biodiversity loss. The control of pests through synthetic pesticides is rather difficult as there is possibility to retain toxic residues in the fresh cut vegetables which cause health hazard and environmental pollution. It was found that insecticides of biological origin were relatively less harmful to Coccinella than synthetic ones. The pathogens, Bacillus thuringiensis Berliner and Beauveria bassiana (Bals.) Vuillemin caused significant lower killing of the predator (less than 40%) whereas the synthetic insecticides, DDVP and malathion caused significantly higher killing (more than 50%). Botanical and microbial insecticides are bio-pesticides having less or no hazardous effects on bio-agents, human health and the environment, and therefore, they can be incorporated in Integrated Pest management Programme (IPM) and sustainable agriculture. Uses of botanical pesticides are helpful for formulation of organic farming.