Seed & Chemical
Residual two-pass system helps manage resistant weeds
By Top Crop Manager
May 17, 2013, Mississauga – Research from BASF Canada Inc. (BASF) has found there is value in using a residual two-pass system to manage herbicide resistant weeds in GT corn, while increasing average yield by more than 20 bushels per acre.
BASF says it conducted field trials in Ontario in 2012 using a pre-emergence application of Integrity followed by Armezon post-emergence to evaluate the residual activity of a two-pass herbicide system on GT corn. The results of the two-pass system show improved control of tough and resistant weeds, including giant ragweed, according to a press release. Further, BASF says there was an average yield increase of 20.7 bushels per acre compared to a single glyphosate application applied at the four leaf stage.
Earlier this spring, BASF released findings from an Ipsos Reid survey that found 61 per cent of growers in Ontario believe their weeds are getting tougher to control. That sentiment was echoed at an agricultural retailer meeting in February where 83 per cent of the 312 in attendance reported they have customers with weeds that are suspected to be herbicide resistant. More information is available online at www.AgSolutions.ca.