氯氟吡氧乙酸对姜的安全性及除草生物活性测定

Determination of Selectivity and Herbicidal Activity of Fluroxypyr to Ginger

采用室内盆栽法及田间小区试验测定氯氟吡氧乙酸对反枝苋等阔叶杂草的除草效果及对姜的安全性,以探讨氯氟吡氧乙酸茎叶喷雾处理防除姜田杂草的可行性。结果表明,氯氟吡氧乙酸防除姜田杂草的安全性系数为10. 76,安全性好;田间小区试验结果表明,防除反枝苋等姜田代表性杂草有很好的防效,施药后40 d株数防效为77. 45%～94. 08%,鲜质量防效为86. 65%～95. 02%;姜收获时测产结果表明其具有增产效果。说明氯氟吡氧乙酸防除姜田杂草具有防效高、安全性好等特点。

An pot experiment and a field plot experiment were used to determine the herbicidal effect of fluroxypyr on broad-leaved weeds,including Amaranthus retroflexus ,and its selectivity to ginger to explore the feasibility of fluroxypyr for controlling weeds in ginger fields by foliar spraying. Fluoroxypyr had safety coefficient of 10.76 in ginger fields indicating good selectivity. In the field plot experiment fluroxypyr provided very good control of typical weeds in ginger fields,such as A. retroflexus . The weed control efficacy was 77.4%~94.1% and 86.6%~95.0% based on plant number and the fresh weight,respectively,at 40 days after treatment. Crop yield increased when fluroxypyr was used. Overall fluroxypyr was highly effective at controlling weeds and exhibited good selectivity to ginger.