氟嘧啶草醚对稗草的作用方式及对水稻安全性研究

Study on the Mode of Action of Luorouracridine on Barnyard and Its Safety on Rice

氟嘧啶草醚是新开发的嘧啶水杨酸类除草剂,对稻田杂草具有较好的除草活性。本研究采用土壤喷雾法、茎叶喷雾法和叶片涂抹法测定了氟嘧啶草醚的作用方式和对水稻的安全性。结果表明,氟嘧啶草醚可以通过稗草叶片、叶鞘和根系吸收而发挥杀草活性,但不能通过芽鞘吸收。氟嘧啶草醚对水稻安全性较高,其在稻田的选择指数达6.20,3种类型水稻品种对氟嘧啶草醚的敏感性没有差异。

Luorouracridine (temporary name) is a newly developed pyrimidine salicylic acid herbicide, which has good herbicidal activity on rice field weeds. In this study, the methods of soil spray, stem-leaf spray and leaf smear were used to determine the action mode and safety of luorouracridine in rice. The results showed that luorouracridine could be absorbed by barnyard grass (Echinochloa crusgalli) leaves, leaf sheaths and roots, but could not be absorbed by bud sheaths. Luorouracridine was relatively safe for rice, with a selection index of 6.20 in the rice field, and there was no difference in the sensitivity of the three types of rice varieties to luorouracridine.