Abstract

FERREIRA, Evane; VIEIRA, Noris Regina de Almeida  and  RANGEL, Paulo Hideo Nakano. Evaluation of damages caused by Oebalus spp. in irrigated rice genotypes . Pesq. agropec. bras. [online]. 2002, vol.37, n.6, pp. 763-768. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2002000600004.

The objective of this study was to evaluate the reaction of irrigated rice genotypes to the damage caused by adult paddy bugs (Oebalus spp., Hemiptera: Pentatomidae) during spikelet development and maturation. Quantitative and qualitative losses, as well as total loss, caused by O. poecilus were compared among ten genotypes in the first and second field experiments, respectively. At the same time, five genotypes, in the first experiment, were also compared to damage caused by O. ypsilongriseus. Significant differences were observed among the evaluated genotypes in relation to reaction to insect species. For both experiments, the overall average loss caused by O. poecilus was 52.7%. The average total loss was greater for Metica 1 and CNA 7545 and smaller for CNA 8033.

Keywords : Oryza sativa; spikelets; losses; insects.