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1 December 2016 Resistance of Rice Varieties to Sitophilus oryzae (Coleoptera: Curculionidae)
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Rice, Oryza sativa L. (Poaceae), is one of the world's most important food crops. Among the insects that damage rice grains, the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae), is the most important species. The objective of this study was to identify rice varieties with resistance to S. oryzae as measured by grain feeding damage and S. oryzae reproduction. The rice varieties evaluated were obtained from the germplasm bank of the National Center of Research Rice and Beans, Embrapa, Brazil. The experimental design was completely randomized with 3 replications and 22 treatments (varieties). The varieties Bonança, Esmeralda, and Rio Verde had the antibiosis and/or antixenosis type of resistance, providing high rates of mortality, low rates of adult emergence, and low rates of grain consumption by S. oryzae. The varieties Pepita and Progresso were susceptible, with a high rate of S. oryzae adult emergence and grain consumption. The presence or absence of a fissure in the grain was a major morphological characteristic determining susceptibility or resistance to S. oryzae in rice varieties.

Diana Cristina da Silva Costa, André Cirilo de Sousa Almeida, Marcio da Silva Araújo, Elvis Arden Heinrichs, Mabio Chrisley Lacerda, José Alexandre Freitas Barrigossi, and Flávio Gonçalves de Jesus "Resistance of Rice Varieties to Sitophilus oryzae (Coleoptera: Curculionidae)," Florida Entomologist 99(4), 769-773, (1 December 2016).
Published: 1 December 2016

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