Home Crop Monitoring Corn School: Managing pre-emerge herbicides in dry spring conditions

Corn School: Managing pre-emerge herbicides in dry spring conditions


Dry spring planting conditions have many growers questioning how their soil-applied residual herbicides will carry out, because the climate continues to warmth up with little significant rain in sight.

Analysis by College of Guelph weed scientist Dr. Peter Sikkema signifies pre-emergence herbicides will nonetheless ship vital worth for growers in dry spring conditions. He notes that soil-applied merchandise sometimes ship between 50 to 80 p.c management even in the absence of an activating rain.

On this episode of RealAgriculture’s Corn College, BASF agronomist Rob Miller notes that full activation of the herbicide is dependent upon the energetic ingredient. Some herbicides require as much as 3/4″ or extra for robust efficiency whereas others could make do with 4/10″. That moisture, nonetheless, wants to come back in a single rain occasion for constant efficiency and powerful management of late-flushing weeds, provides Miller.

If growers do see weed escapes as a consequence of low activation, the most effective plan of action is to speed up the timing of a post-emergent utility. To handle escapes, fields that may sometimes be sprayed at 5- or 6-leaf could require an utility on the 1- to 2-leaf stage. Miller provides that even when the effectiveness of the soil-applied herbicide is decreased, it contributes considerably to weed management by lowering choice strain and reliance on the in-crop herbicide. (Story continues after the video)

General, Miller is advising growers to “stay the course and manage the crop, not the weather.” He says it’s not solely necessary to regulate weeds this yr but in addition take an built-in administration strategy the place controlling weeds in the corn crop will set growers up for fulfillment in following soybean and wheat crops.

Click on right here for extra Corn College episodes.


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