A dreaded thing might be here! Resistant Pigweeds

A dreaded thing might be here! Resistant Pigweeds

 

I am afraid that we might be having the appearance of glyph sate (Round Up) resistant pigweed (Palmer Amaranth, not Water Hemp) showing up in some fields in southern Grant County. If this is the case the use of rotations and pre-emergent chemistry will become imperative not just good farming practices.

Arkansas, and the eastern part of Oklahoma have been dealing with this problem already, and now we will probably have to. Due to the seed bearing capabilities of these plants and its speedy growth and survivability, this problem will probably spread very quickly. Producers should farm like it was already wide spread……………because it will be.

These two pigweeds were both sprayed with same rate of glyphosate on same day this far apart in the field, one on the right obviously seems resistant.

Dead pigweeds all around these three obviously unaffected pigweeds after glyphosate application

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