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Chlorsulfuron (Glean) for Control of Shoot Growth and Root Buds of Canada Thistle

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Title: Chlorsulfuron (Glean) for Control of Shoot Growth and Root Buds of Canada Thistle
Author: Donald, William W.
Description: Canadian Thistle is a serious perennial weed as it spreads 'vegetatively' by an extensive root system and forms new secondary shoots from root buds. This weed was most dominant in eastern North Dakota. It was estimated to have infested rto 12-21% of grain farmlands in North Dakota. Chlorsulfuron (trade name Glean) is a herbicide that was introduced for the selective control of broad leaf weeds and some grass weeds in cereals. Chlorsulfuron is unique in providing selective, season long control of Canadian Thistle in cereals. A treatment in the Fall produced a 90% reduction in rosette, pre-bud and the flowering stages of Canadian Thistle. More information was needed on how chlorsulfuron affected Canadian Thistle shoot growth, root growth and plant establishment from root buds for the express purpose of the improvement of it's efficiency in the field. A study was conducted to answer other questions about this herbicide in regards to this weed. This study is reviewed in this article. The general methods, the effects of surfactants, time of exposure to chlorsulfuron, the effect of growth stage, statistical analysis and, finally, the results, the results and discussion are presented. It was concluded that chlorsulfuron controlled shoot growth, root growth and secondary shoot emergence best when younger plants were sprayed in lieu of large 'vergatative' or flowering Canadian Thistle plants.
Date: 1986
Subject: Herbicides
Permalink: http://hdl.handle.net/10365/8807

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