Green Roof Grub Infestations

Dry patch from grub damage.

Green roof grub infestations.

The friendly neighborhood lawn technicians at green lawn fertilizing are here to help. We know how to end grub infestations the natural way to prevent you from experiencing the problems associated with lawn grubs. Last fall we helped swarthmore college diagnose and treat a white grub infestation on one of their green roofs. As your lawn begins to green up look for brown patches that never turn green.

After the beetles mate during late spring early summer the females lay eggs in the soil. While ravaging most of the green roof the crows and grubs avoid the plantings of sedum kamtschaticum. If a patch of grass lifts up like a carpet with no roots holding it down you likely have an infestation of lawn grubs. Mix 1 2 cup buttermilk and 4 cups of wheat flour with 5 gallons of water.

Once the eggs hatch the grubs feed in the soil during the warm days of summer. These dead patches of grass may be grub damage from the previous fall. Introduce predatory insects that feed on spider mites such as lady beetles praying mantises and assassin bugs. Or try this remedy from garden writers association hall of famers doc and katy abraham authors of the green thumb garden handbook.

Grubs are voracious feeders and in most cases are the larvae of japanese beetles annual white grubs or green june beetles. However infestations on green roofs do occur. In extreme scenarios the lawn may roll up like carpet or sod. By recognizing the infestation signs early the college s professional horticulture team was able to control the grub problem through organic pest control methods.