Reinvasion of plants can be rapid. However, to protect seedlings, applications usually must be reapplied. The plants produce continuous new growth and the highly mobile beetles may rapidly reinvade plantings. As with all pesticides, carefully read and follow all label directions. Pay particular attention to ensure that any flea beetle insecticides being considered are properly registered for use on the crop.
Diatomaceous earth is one of the more effective repellents, applied as a dry powder to the plants.
Horticultural oils and some neem insecticides also have some repellent effect on this insect. Some common flea beetles found in Colorado. The most damaging species in the state. Two and occasionally three generations are typical. Has the widest host range of all flea beetles including squash, beans, corn, sunflowers, lettuce, potatoes and many weeds.