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Residues of ZR-515 (isopropyl 11-methoxy-3,7,11-trimethy1-2,4-dodecadienoate) were greatly affected by sunlight and temperature. The technical ZR-515 tended to remain on the water surface, and its distribution was affected by wind. The half-life of technical ZR-515 or an EC formulation in field water was only about two hours. Treatments of 10 percent flowable liquid (slow release) formulation in water showed almost no detectible residues by chemical analysis after 24 hours, although biological activity persisted for several days.
Schaefer et al. (Wed,) studied this question.