Formulated as a dust for use in voids or around electrical installations where liquid sprays may not be appropriate. For the general control of crawling or resting insects, it can be applied by hand or powered dusters, and offers excellent wasp control. Formulated as a dust for use in voids or around electrical installations where liquid sprays may not be appropriate. For the general control of crawling or resting insects, it can be applied by hand or powered dusters, and offers excellent wasp control.