48%盖灌能EC冬春两季防除加拿大一枝黄花试验

[目的]探索高效、节能的加拿大一枝黄花防除办法。[方法]设不同浓度的盖灌能EC、龙拳SG、农达AS、莎阔丹SL、使它隆EC与对照（CK）9个处理来验证防除效果。[结果]冬除药后7 d,除对照外各小区普遍表现叶片发黄、心叶萎蔫,其中48%盖灌能高、低量与20%使它隆处理中毒症状最明显,其次为46%莎阔丹处理。48%盖灌能同75%龙拳复配处理和41%农达处理中毒略轻,中毒最轻的为75%龙拳的两个处理;药后15 d,各用药处理中毒症状进一步加重;春除比冬天见效快。[结论]重发地区宜在春秋两季出苗高峰后连续两次用药,春除时采用48%盖灌能EC 3 L/hm^2或48%盖灌能EC 2 000 ml/hm^2＋75%龙拳SG 150 g/hm^2处理,冬除时除可选用春除配方外,还可使用41%农达AS 4 500 ml/hm^2。连续两次防治后,效果较理想。

Experiment of 48% Gaiguanneng EC Control Solidago canadensis in Winter and Spring

[Objective] This paper explored the efficient and energy saving method to control S.canadensis.[Method] Different concentrations of Gaiguanneng EC,Longquan SG,Nongda AS,Shakuodan SL,Shitalong EC and CK,total nine treatments were used to validate the control effects.[Result] 7 days after treatment in winter,each plot generally performed yellow leaves,heart-leaf wilting except CK,in which toxic symptom of high and low quantity of 48% Gaiguanneng and 20% Shitalong was most significanc,next was 46% Shakuodan teeatment.The toxic symptom of 48%Gaiguanneng 75% Longquan and 41% Nongda treatment were slight mild,and the two treatments of 75% Longquan were the most mild;15 days after treatment,the toxic symptom of each treatment was further aggravated;spring control was faster than winter control.[Conclusion] Heavily occurred area should apply two successive treatments in spring and autumn.48% Gaiguanneng EC 3 L/hm2 or 48% Gaiguanneng EC 2 000 ml/hm2 75% Longquan SG 150 g/hm2 treatments should be applied in spring,and in winter we should apply 41% Nongda AS 4 500 ml/hm2 besides spring control formula.After two successive treatments,the results were ideal.