- Advertisement - The Arkansas County Extension Service will hold pesticide certification training for those needing re-certification or new certification in order to obtain a license for 2021 from the Arkansas State Plant Board. Pre-registration is required and no walk-ups will be allowed for the seven sessions that will take place on the dates listed below: • Thursday, March 4 at 1:30 p.m. • Friday, March 5 at 9:30 a.m. and 1:30 p.m. • Monday, March 8 at 9:30 a.m. and 1:30 p.m. • Friday, March 12 at 9:30 a.m. and 1:30 p.m. All training sessions will take place at the DeWitt Community Center. The cost to attend is $20 per person and is payable at the training session. The registration does not affect the price paid to the Arkansas State Plant Board for a license.