Tuesday, November 18, 2014

Weed Control Risks Associated with Non-GMO Soybeans

Why a switch to Non-GMO soybeans could be a bad idea when it comes to weed control:

·         Challenging and much higher level of weed management –  Many may have forgotten how hard weed control is in Non-GMO beans because we are used to Round up Ready beans

·         Better suited with preplant tillage, conventional row spacing, where there could be the option of cultivation and not as suited for no-till, narrow rows

·         Better suited for fields free of existing weeds 

·         Harder to control a broad spectrum of weeds - Broadleaves are not as easy to control over grass weeds

·         Very, difficult to control amaranths (pigweeds, waterhemp, Palmer amaranth)

·         Not suitable for fields that consist of resistant weeds (ALS, PPO, or HPPD)

·         More likely to have possible herbicide injury to soybeans

·         Post has to be applied before the weed is 4 inches tall – no exceptions!

·         Limited amount of broad spectrum post herbicide options for grass – need a combination of herbicides 

·         No herbicide rescue options

·         Possible issues with herbicide carryover from a post herbicide application (ALS herbicides for instance)

·         Even if everything is done correctly, heavy weed pressure can overcome herbicide treatments, with limited rescue options

·         Picking the right fields, right herbicides, and early application much more critical in Non-GMO than in Liberty Link Soybeans

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