Effect of Short Interval Application of Insecticides and Herbicides on Phytotoxicity, Growth and Yield of Rice

• Published in: Korea Journal of Weed Science Vol. 23; no. 3
• Main Authors: Shin, X.R. (Chungnam National University. Daejeon, Republic of Korea), Pyon, J.Y, Oh, S.W
• Format: Journal Article
• Language: Korean
• Published: 01.09.2003
• Subjects: ARROZ; FITOTOXICIDAD; PHYTOTOXICITY; PHYTOTOXICITÉ; RICE; RIZ
• ISSN: 0253-7468

Short interval application effects of various insecticides followed by herbicides on rice were studied in the greenhouse and a paddy field. The insecticides were applied into nursery box directly one day before transplanting of rice plant. Herbicides of azimsulfuron, bentazon and molinate were applied at standard, double and triple rates at 10, 15, 25 days after transplanting, respectively. The insecticides quinalphos, carbosulfan and carbofuran increased the phytotoxicity and inhibited early growth of rice by application of the three herbicides. However, a phenylpyrazol insecticide, fipronil showed a slight phytotoxicity to rice when applied sequentially with the three herbicides, and there was no significant difference in yield in the field experiment. The enhanced phytotoxicity of herbicides to rice due to insecticides indicated that it may need careful consideration in sequential application of insecticides and herbicides, and herbicide treatments at 5 days before or after an insecticide application were most safe methods to rice.