Investigations were carried out to determine the most susceptible variety among three local sorghum cultivars, namely Fara-fara, Kaura and Lale, to Sitophilus zeamais Motsch. Physical parameters (length, width and moisture content) of each of the sorghum varieties were determined before introduction of the adult weevils for the susceptibility test. Adult emergence and grain damage were also evaluated. Results of this study showed that Lale had the highest (0.75cm) grain length while Fara-fara had the least (0.63cm). Statistically, there was no significant (p<0.05) difference between the grain length of the three local sorghum varieties. It was found that Lale had the highest (1.10cm) mean grain width, while the least (0.73cm) was recorded from Kaura. The results show that there was a significant (p<0.05) difference between the grain width of the three local sorghum varieties. Lale variety had the highest (7.4%) moisture content, while Fara-fara had the lowest (7.1%). highest (268.25) adult emergence was obtained from Fara-fara variety, while the least (113.50) was from Kaura local variety. highest (15.71%) grain damage was observed in Fara-fara, while the least (8.47%) was from Kaura. The sorghum grain damage caused by S. zeamais on the three different was significantly (P<0.05) different. The findings of this study have shown that all the three sorghum local varieties were susceptible to S. zeamais, and Fara-fara was the most susceptible variety to S. zeamais among the tested varieties. Susceptibility test of the three sorghum local varieties against other insect pests of storage is hereby recommended.
