The autogamy and self-incompatibility of four sunflower cultivars namely NK-262, NK-265, NK--281 and Sundak were investigated under six pollination treatments. The pollination treatments were natural self-pollination, manipulated self-pollination, assisted self-pollination, foreign pollination, cross-pollination.It appeared that sunflower cultivar NK-262 wasself-compatible. Whereas, theefficacy of these pollination treatments in NK-265, NK-281 and Sundak were affected due to the ratio of seedset and autogamy exhibited by these sunflower cultivars. However, Sundak was self-incompatible. Maximum seedset (96.25%) was recorded in sunflower cultivar NK-262 under open-pollination The minimum seed set of 12.14% resulted in Sundak when assisted self-pollination was adopted. Estimates for percent autogamy of NK-281 were higher (92.64%) under cross pollination. However, the autogamy for the other pollination treatments was minimum. There were significant differences among the sunflower cultivars for the percent modified autogamy. NK-262 and Sundak exhibited maximum and minimum modified autogamy of 101.45% and 28.70%, respectively.