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The project was initiated to develop a data base on the effect of selected herbicide treatments on a broad spectrum of corn inbreds used in the development of new hybrids with the ultimate goal of establishing new registered treatments for the growers through the minor use registration process.
Objectives:
- To develop a database on crop tolerance and growth effects to selected herbicides on a wide spectrum of corn inbreds.
- To utilize the database in the submission of a Minor Use Registration Request to the Pest Management Regulatory Agency.
- To have available for Industry approval for growers, additional weed management strategies for use in seed corn production.
2003 Seed Corn Annual Research Report
Dr. Al Hamill, PhD
Weed Management, AAFC-GPCRC
Seed corn research trials were conducted in collaboration with Hyland Seeds, Pride Seeds, Pioneer Seeds, and Syngenta Seeds. Trial set up and data collection followed the same pattern as in previous years.
Changes in treatments from the previous years, included the elimination of Striker from the program and part way through the year it was learned that Fieldstar will not be available for use in the future. This latter treatment will be removed from the treatment list for 2004. A request for removal of the minor use application for both of these materials will be made to the Pest Management Regulatory Agency (PMRA).
At the Pioneer site, Axiom at the 2X rate caused considerable stunting to some of the inbreds but resulted in yield reduction for only two of them.
The data from previous Callisto trials has been incorporated into the registration package submitted by Syngenta and it is anticipated that this treatment will be available this spring. It will allow for diversity in broadleaf weed control. It needs to be pointed out that only the preemergence application has been evaluated in these trials. A new entry from Syngenta was made on the treatment list where some of the previous treatments had been dropped. Slight temporary injury was noted from the 2X rate on a few Syngenta inbreds but not at the other sites.
Converge at the 2X rated caused some severe bleaching of the corn tissue on the majority of the inbreds at the Pioneer site, slight injury at the Syngenta site on a few inbreds and no injury at the Hyland or Pride sites; this is most likely a result of a combination of soil type and rainfall shortly after application. There were only a couple of inbreds where this resulted in a negative impact on yield.
Since Frontier is now registered for use in seed corn, this treatment was not utilized in 2003 but was incorporated as a preemergence component with a potential new broadleaf control material from BASF. This latter material is as yet not named.
No negative impacts were experienced from Peakplus at any of the locations.
A new entry from Nufarm was added to the treatment list at all locations. No crop injury was observed from any of the treatments. Currently, this product does not have a trade name. Submission has been made through the company for registration.
Data compilation is still underway and the current year’s information will be submitted to PMRA as soon as possible.
The Seed Corn Growers of Ontario, De Dell Seeds Inc., Hyland Seeds, Maizex Inc., Pioneer Hi-Bred Limited, Pride Seeds and Syngenta Seeds provided financial support for the 2003 research.
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