Things You'll Need
- Weed barrier cloth
- Shovel
- Cover crop seed
- Decaying organic material
- Adult beetles
- 1/2" PVC piping
- Floating row cover
- Power edger
- Light
- Container with inverted funnel opening
Instructions
Seeding and Starting
Dig a trench deep enough to allow the grubs to survive if you have harsh winters. The grubs hibernate deep underground in the winter. Once the trench is finished, line with the weed cloth to prevent your crop from escaping.
Fill the trench with soil, mixing plenty of the decaying organic material in with it. Sow heavily with your choice of cover crop. Phyllophaga feeds heavily on corn, grass and soybean roots. Allow the cover crop six to eight weeks to establish itself before introducing the beetles.
Create short hoops over the trench with PVC piping and cover them with the floating row cover to prevent the beetles from escaping. Release the breeding stock into the tunnel.
Harvesting
Mow your trench to make the sod easier to handle. Cut the sod using the power edger into two foot strips. Roll the strips up and harvest the grubs you will find, leaving about two thirds to continue to grow. Common June Beetles take about three years to mature.
Release fresh breeding stock into the tunnel yearly for the first three to four years to replenish the grubs and create a continuous harvest after the third year when mature adults begin to appear. You can remove the tunnel at times when the adults are not in flight.
Set the tunnel up in mid-May of the third year to contain the emergence of mature flying Phyllophaga. Capture them using a light with a container below it, a funnel opening will prevent the beetles from climbing back out. Release enough back into the tunnel to ensure your stock is not depleted.