Seasonal occurrence of predacious mirid bugs and rice planthoppers in a rice paddy field after release of the mirid bug Cyrtorhinus lividipennis Reuter.

概要

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To elucidate the effects of the predacious mirid bug Cyrtorhynus lividipennis on the brown rice planthopper (BPH), Nilaparvata lugens, we released C.lividipennis in a paddy field and examined the seasonal prevalence of the two species as well as the white-backed rice planthopper (WBPH), Sogatella furcifera, and another predacious mirid bug, Tytthus chinensis. A population census of the above four species was also conducted in two other fields where C. lividipennis was not released. The density of BPH was kept low in only one part of the area where the C.lividipennis population was released, and also in the two fields where C.lividipennis was not released. The population of T.chinensis increased when the density of WBPH was high in the three fields examined. It increased slightly when the density of BPH was high and where Clividipennis was present. It increased synchronously with the increase of BPH where C.lividipennis was absent.
九州病害虫研究会の論文