The aims of this study were to follow up on the establishment of Cotesia vestalis in the coastal regions of Kenya, assessing its contribution in the management of the diamondback moth (Plutella xylostella), parasitism rates, and cultural practices affecting its establishment. Post-release surveys were carried out in five counties in Kenya, Kitui, Kajiado, Kwale, Machakos and Makueni, between 2015 and 2016. The results showed that the overall parasitism rate of C. vestalis in 2015 ranged between 0% and 37.86% while that in 2016 ranged from 0% to 32.19% in the different counties. Farmers carry out routine sprays, either weekly or fortnightly, with different synthetic insecticides. Pyrethroids (60.56%) constituted most of the insecticides used, while only 3.18% of the products used were plant or microorganismbased. Farmers did most of their cabbage production during the rainy season, with
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