BTW - there is a newly registered herbicide that shows promise on watermeal (and possibly duckweed) without the long contact-time required by fluridone; with little - if any irrigation restriction. The downside (always a downside) is that the new product is short-lived once applied. So, unlike fluridone's lengthy period of activity (which continues to control weeds from newly germinating seeds for several weeks or months), this new herbicide might require more than one treatment per season. BUT, spot-treatments might be possible. Still much to learn..... More details to follow later this spring.
