Change in number of arthropods and rice growth with and without use of Rana nigromaculata and pesticide
2002
"Goto, N. (Niigata Univ. (Japan). Faculty of Agriculture) | Araki, H. "
"In order to develop a system in which pesticide can be reduced by utilizing frogs in rice production, the number of arthropods and rice growth were investigated in a paddy in which no pesticide was used but Rana nigromaculata had been released. These two factors were then compared for paddies in which pesticide but no frogs were used. The number of arthropods in the upper part of rice plants was not affected by Rana nigromaculata release or pesticide treatment. In the lower part of the plant, the number of spiders decreased and resulted in a slight increase of larval Detocephalidae in the paddy with Rana nigromaculata. A negative relationship was recognized between the number of spiders and larval Detocephalidae in late August. The number of collembola decreased with pesticide treatment. Collembola, spiders and Hemiptera were detected mainly from the stomach of Rana. No significant difference was observed in the growth and yields of 'Koshihikari' rice either with or without pesticide, compared to the case with Rana and the use of no pesticide."
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