The efficiency of many strategies is enhanced if their timing is coordinated with veliger and mussel settlement data collection.
Generally, chemical controls to prevent settling and infestation need to be only over spawning periods, defined as water temperatures greater than 55 to 61 ºF (12 to 16 ºC). Continual application of molluscicides is recommended at this time for maximum effectiveness in intake structures (McMahon and Tsou 1990).
Zebra Mussel Chemical Control Guide
The Use Guide Outline