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ICT Organics Pre-Emerg Weed Barrier Efficacy Testing Test concluded that there was definitely a change from the 2014 crabgrass seed bank to 2015 seed bank. In all three locations it was noticeable that there was a large bank of crab grass seed in Canada and New Hampshire prior to application. We found the same results with respect to percentages and number of crabgrass plants as well as some dicotyledonous weeds. Pre-Emergent Herbicide Pre-Emerg
