Integrated Experiment on Weed Control Technology in Soybean-Corn Belt Composite Planting Fields
In order to integrate effective technology models of weed control in soybean-corn belt composite planting fields,the field experiment was conducted to control weeds via herbicides applied at pre-emergence stage and pre-and post-emergence stage in 2023.The results showed that plant control effects of pyroxasulfone·metribuzin 80％WG at 450 g/hm2 or s-metolachlor 45％CS at 1 500 mL/hm2+s-metolachlor·flumioxazin 33％CS at 1 500 mL/hm2 applied at pre-emergence stage on gramineous weeds were all more than 94％.The comprehensive control effects of s-metolachlor 45％CS at 1 500 mL/hm2+s-metolachlor·flumioxazin 33％CS at 1 500 mL/hm2 applied at pre-emergence stage,pyroxasulfone·metribuzin 80％WG at 450 g/hm2 applied at pre-emergence stage+bentazone 480 g/L AS at 3 000 mL/hm2 applied at post-emergence stage soil on gramineous weeds and broad leaves weeds were all more than 94％.In this work,we integrated three weeding modes including weeding gramineous weeds at pre-emergence stage,weeding gramineous weeds and broad leaves weeds at pre-emergence stage,and weeding at pre-and post-emergence stages.The herbicids with high selectivity could control weed in composite planting fields of Henan Province on the basis of registration.
soybean-corn belt composite plantingapplied at pre-emergence stageapplied at pre-and post-emergence stagesweed control
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