氰氟草酯乳油防除水稻秧田千金子效果及安全性

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氰氟草酯乳油防除水稻秧田千金子效果及安全性

作者：李海山郭艳超左永梅

来源：《安徽农业科学》2015年第10期

摘要

[目的]明确氰氟草酯的除草效果、适宜的用药量以及对水稻秧苗的安全性。[方法]以50%二氯喹磷酸可湿性粉剂为对照药剂，通过田间药效试验研究了100 g/L氰氟草酯乳油不同剂量（90、120、150、180 g/hm2）对水稻秧田千金子、稗草等杂草的防除效果及对水稻秧苗生育的安全性。[结果]100 g/L氰氟草酯乳油用药量150 g/hm2时对水稻秧田抗性杂草——千金子具有很好的防除效果，施药后20 d除治千金子的效果达到98.3%，千金子生物鲜重抑制效果为98.7%，同时对稗草的除治效果为96.2%；100 g/L氰氟草酯乳油不同剂量对水稻生育安全。[结论]100 g/L氰氟草酯乳油是除治水稻旱育秧田千金子的优良除草剂，并可兼治稗草等1年生杂草。

关键词氰氟草酯；水稻秧田；千金子；防除效果；安全性

中图分类号S451.21文献标识码

A文章编号0517-6611（2015）10-119-02

Abstract [Objective] The aim was to make sure efficiency and safety of cyhalofopbutyl emulsifiable concentrate on controlling L. chinensis in rice seedling field. [Method] 50% Quinclorac wettable powder was taken as control agent， and efficiency and safety of 100 g/L cyhalofopbutyl emulsifiable concentrate at different concentrations of 90， 120， 150 and 180 g/hm2 on controlling L. chinensis in rice seedling field were studied by field efficacy trials. [Result] 100 g/L cyhalofopbutyl emulsifiable concentrate at the dosage of 150 g/hm2 had good control effect on L. chinensis， and the control effect on L. chinensis reached 98.3% in 20 days after treatment， and the inhibition effect on biological fresh weight was 98.7%， meanwhile the control effect on barnyard grass was 96.2%. The use of 100 g/L cyhalofopbutyl emulsifiable concentrate was safe for the growth and development of rice. [Conclusion] 100 g/L cyhalofopbutyl emulsifiable concentrate was suitable for controlling L. chinensis in rice seedling field， and could control barnyard grass.

Key words Cyhalofopbutyl；Rice seedling field；Leptochloa chinensis （L.） Ness；Efficiency；Safety

华北冀东滨海水稻种植区域面积约13.30万hm2，传统的栽培方式和常规除草剂的多年应用致使田间杂草群落发生演替，近年来，水稻秧田千金子发生密度逐步增加，已经上升为主要