ABSTRACT
The objective of the research was determine the loss caused by Sitophilus zeamais and Sitophilus oryzae in rice Oryza sativa L., in some cultivars of State of Piauí: Metica-1 irrigado, Araguaia unirrigated, Uruçuí unirrigated, Diamante irrigated, Primavera unirrigated Cica-9 irrigated, Uruçuí unirrigated, Canastra unirrigated, Paranaíba unirrigated and Caiapó, with bark and without bark. The experiments were conducted in the laboratory with a temperature of 30 ± 2o C and relative humidity of 51 ± 5%. Every treatment had 4 replicates with 20 insects and 200 grams of beans each, for a total of 80 insects and 800 grams per treatment. Every 15 days the recipients were weighed and the values of loss weight noted during 6 months. The results show that the irrigated Cica-9 variety with bark and without bark was more resistant.
KEY WORDS:
Rice; resistant; Sitopilus oryzae; Sitopilus zeamais.