Beetles

Pest Beetle Control With Natural Solutions

Beetles (Coleoptera) are the largest insect group, representing roughly 40% of all identified worldwide. We sell multiple beetles beneficial to growers (Rove Beetles, Cryptolaemus montrouzieri, ladybugs); however, many are also plant pests feeding on roots, foliage and fruit. Some species, like Japanese Beetles, prefer egg-laying in areas with specific cultivars (i.e. turf) while feeding on a wide range of other hosts as adults.

Life Cycle: Eggs can be laid in the soil, on grain, on leaves, on seeds, or in plants themselves. Larvae feed voraciously once they emerge, often causing damage to foliage and/or roots with some damaging stem tissue as borers. Eventually the larvae pupate and mature adult beetles emerge. Adult beetle activity is variable depending on the species and availability of food sources; however, feeding damage often results in chewing damage and skeletonization of leaves.

Beetle Control:

Scouting – Beetle control begins with plant inspection. Spotting eggs or larvae early makes control easier to maintain. Trapping adults early in the season can also be helpful in identifying and monitoring pests before they become severe issues.

Grub Control – Apply Hb NemaSeek nematodes to target grub larvae when soil temperatures are above 42°F.

Adult Beetle Control –

  • Beauveria bassiana sprays minimize risk to beneficials and provide lasting control once applied. BioCeres WP is a common mycoinsecticides used for adult beetle control.
  • Azera Gardening uses azadirachtin and pyrethrins to kill on contact and through ingestion. Use caution during flowering.
Browse our full list of control options below. You can also find more information on grub & beetle control or specific beetle pests like cucumber beetles, Colorado potato beetle and flea beetles.