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Tolerance to fl our beetle (Sitophilus spp.) damage in common and high quality protein maize genotypes. A fi eld experiment was carried out during the spring and sum- mer seasons of 2002 at Cotaxtla Experimental Station, in Ve- racruz State Mexico, to determine the yield and agronomic characteristics of tropical corn genotypes and the damage caused by fl our beetle (Sitophilus spp). Five common and 14 high quality protein maize genotypes (QPM) were evaluated using a random block design with two replications. Grain yield, percentage of rotten ears, husk cover and ear damages by fl our beetle in storage and in the fi eld were evaluated. The damage was measured for fi ve months at different harvest ti- mes and in stored ears. There were signifi cant differences in all traits, except number of rotten ears. Highest yields were recorded in three genotypes: the two common genotypes H- 520 (7.93 t/ha) and SINT 9 (7.11 t/ha), and the high quality protein hybrid H-553C (7.01 t/ha). These hybrids showed good husk cover, but damage was signifi cantly higher as the harvest date was delayed, increasing from 0.19% in January to 76.8% in May. The genotypes less susceptible to damage under fi eld conditions were H-519C, H-363C and VS-536 (less than 2%). After fi ve months of storage, H-363C and SINT9 experienced less than 70% damage, while the other genotypes presented damages higher than 90%.

Tolerancia a infestación por gorgojos (Sitophilus spp.) en genotipos de maíz comunes y de alta calidad proteínica