Here is my 1 year update on the Sonar vs. Hydrilla. The Hydrilla and Southern Naaid has returned. The amount of plants have been drastically reduced to an estimated 15% coverage. The biologist at Sepro informed me that Hydrilla spreads by fragmentation and by tubers(seed) created on the roots of the plants. The idea is to kill the plant early before it has a chance to grow the tubers on its roots.
The general consensus is that the Hydrilla plants that showed up this year came from the tubers of the plants that were eradicated last year. Therefore it may take a couple of
correctly timed applications to bring it under control. In summation, if you are selling Sonar this is a good thing, if you are my wallet this is a bad thing!!!
