Homeowners can now find grub-control powder mixed in lawn fertilizer at their local garden center. These combination production reduce grubs in a lawn by adding bacteria spores and increasing lawn growth with fertilizer. Of course, you can make your own mixture of the two parts by combining grub control powder with the lawn fertilizer of your choice.
Bare spots of grass in an otherwise healthy lawn could signify a grub problem. More than ten grubs in 1 square foot of soil signifies a need for grub control. Organic growers use milky spore powder as a long-term solution for grubs. Grubs ingest the milky spore bacteria and die, releasing millions more of the spores into the soil at their death. Soil well-infiltrated with the milky spore bacterium kills any grubs that burrow into it.
Lawn fertilizers should be used with discretion because of the affect they have on our waterways, such as fueling the growth of algae that harm fish and crabs. Organic fertilizers also encourage grass to grow quickly and fill in area where pests like grubs kill grass. Allow grass clippings to stay on your lawn to provide important nutrients to the soil as they decompose. There are different qualities of lawn fertilizer, and using organic products will help your lawn and the environment in the long run.
It is important to use your grub treatment and lawn fertilizer program when it will be the most effective, or the bacteria will die in the soil before the grubs eat it. Steven R. Alm of the University of Rhode Island Landscape Horticulture Program recommends treating your lawn in the fall. Reseed areas during the summer where grubs have eaten the roots of your grass plants.
Combination lawn fertilizer/grub control is much more effective when used in combination with smart lawn care. Things like watering only during drought, mowing at higher than normal levels and allowing the clippings to remain on your lawn will keep your yard in tip-top shape. Shade trees also help, because shady lawns have less grub infestations.
Many people assume their lawn has a grub problem, but the University of Rhode Island reports that only 10 to 20 percent of all lawns have "damaging populations--and these infestations are often limited to part of a lawn."