 Captain Jack's works two ways, on contact or when the insect feeds. This will ensure that your insect problems are over. Captain Jack's controls all types of insects, including caterpillars, beetles, spider mites, borers and more. Use it on vegetables, flowers, berries, trees, shrubs and fruit. Captain Jack's all-organic insect control is available in easy-to-use dust, liquid concentrate, ready-to-use and ready-to-spray containers with built-in spray applicator.