Submitted to: Meeting Abstract
Publication Type: Abstract only
Publication Acceptance Date: 7/4/2007
Publication Date: 9/17/2007
Citation: Arthur, F.H. 2007. Combination treatments with diatomaceous earth and methoprene to control the lesseer grain borer, Rhyzopertha dominica, in stored rough rice [abstract]. Presentation at the International Workshop of Management of stored rice. Interpretive Summary:
Technical Abstract: The lesser grain borer, Rhyzopertha dominica, is a major insect pest of stored grains, including rough rice. Diatomaceous earth (DE) is a natural inert dust that can be used to control stored-grain beetles, however, R. dominica is more tolerant to DE compared to other beetle species. Mortality of adult R. dominica exposed on rough rice treated with the label rate of two commercial DE products did not exceed 70% even when used at the label rates. In addition, the extensive survival led to progeny production and damaged kernels. When the insect growth regulator (IGR) methoprene was combined with DE, progeny production was eliminated. Results show that combination treatments of DE plus methoprene could be used to control R. dominica in stored rough rice.