Stability of Imidacloprid (Premise® 75) in a Tank-Mixed Aqueous Solution When Stored in Shade or Sunlight
Polyethylene tanks are commonly used by pest management professionals to mix and apply termiticides. These termiticides are susceptible to rapid photolysis and the ability of application tanks to filter sunlight has been questioned. We investigated the stability of imidacloprid (Premise® 75) in aqueous solutions stored in polyethylene tanks under shade or sunlight. Chemical analysis of aqueous solutions sampled at 0, 24, 48, 72, 168 and 336 h revealed that imidacloprid was relatively stable. Our results indicate that polyethylene tanks are adequate to protect imidacloprid from photo degradation.
KeywordsTermiticide degradation Imidacloprid Polyethylene tanks Photolysis
We are grateful to Bayer Environmental Science for providing the Premise® 75 used in this study. We thank Stephen Danielson and Dennis Berkebile for reviewing an earlier version of this manuscript and Stephen Kachman for consultation on statistical analysis. This is published as contribution no. 1289, Department of Entomology-Institute of Agriculture and Natural Resources, University of Nebraska, Lincoln.
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