An experiment was conducted in the Brazos Valley of Texas near College Station to explore the possibilities of detecting boll weevil, Anthonomus grandis Boheman, resistance in two converted race stocks of cotton where data were recorded from single plants. Four genotypes were examined in this manner, over 100 plants of each. These were sown in complete randomization as single plants, each seed planted 4 feet from neighboring hills on a cotton row. The genotypes were Stoneville 213 (susceptible control), Arkansas 25 frego (a resistant control); and the converted race stocks (T277-2-6 and NT-1180), the latter two known to demonstrate resistance when planted in normal agronomic populations. Percentage punctured square counts showed data on single plants could identify individual plants as being less susceptible to boll weevil attack than Stoneville 213.