Farmers have noticed that the herbicides they have been using for their crops have not been as effective as was the case in years past.  The reason, is because many of the targeted weeds found in fields have been able to build up resistance to those herbicides.  Iowa State University Extension crops specialist Joel DeJong says crop protection chemical companies have not been able to introduce a new line of herbicides since the 1980’s.

 

Iowa State University Extension and Outreach are hosting a series of “Weeds Week” seminars at locations throughout the state this week.  DeJong, in LeMars, and his fellow Iowa State University Extension crops specialists, will lead the discussion of what farmers can do to help reduce the resistance level of weeds.

 

DeJong says even if crop protection companies were able to develop a new line of herbicide, it couldn’t be used right away.