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Grubs & Japanese Beetle Control

A fairly common and frustrating garden insect is grubs, which grow up to become Japanese Beetles. Japanese Beetles will damage certain types of plants in your landscape, while the grubs can cause significant damage in your lawn. At The Barn Nursery & Landscape Center we carry a number of chemical and organic solutions for these pests. Stop by our garden center and we will be happy to help.

Below is an image of a lawn with grub damage. Grub damage will appear in the form of patchy round spots.


When trying to control Japanese Beetles you need the right product at the right time.

Japanese Beetle grubs feed on the roots of your lawn from August thru the end of October, and they LOVE well maintained, irrigated lawns. 

  • To prevent damage, apply Systemic Insect Spray to your lawn in late June-July.  It is really easy to use, just attach your hose and spray.  No sprayer or spreader required! 
  • To control grubs that are already there: if you’ve missed the window and now notice damage caused by the grubs (or the damage caused by raccoons digging up your lawn to eat the grubs) then apply 24 hour Grub Control w/Dylox (late August-September). 
  • Looking for a natural alternative?  Bonide Grub Beater Insect Control is a botanical insecticide that disrupts the grubs feeding and molting ability. Grub Beater is also easy on pollinators and other beneficial insects. 

If you have grubs, you will undoubtedly have beetles, and while treating your lawn will reduce the number of beetles you get the following summer, it does not stop the beetles in neighboring lawns from coming to your yard to feast on your landscape plants. 

To prevent beetle damage to your trees and shrubs apply Bonide Annual Systemic Tree & Shrub Insect Control.  It is easy to apply, just mix in a bucket or watering can according to the instructions and pour on the roots of the tree or shrub you wish to protect.  It would be a good idea to treat the plants that get the most damage such as Birch, Linden, Purpleleaf Sandcherry and herbs.  The best time to treat is in the fall for large mature trees or early spring for smaller trees.  This product is great for large trees because it protects even the very tips of the branches (where beetles do the most feeding) without having to get up on a ladder with a sprayer, and also because it protects plants from a number of other insect pests (such as borers and scale) for an ENTIRE YEAR! 

Already have a beetle infestation?  To control beetles that are already there, use Bonide Beetle Killer at the very first site of them.  The adult beetles release pheromones in order to attract a mate.  If you manage to kill the first ones, you will prevent them from sending out their pheromones and attracting more.  Bonide Beetle Killer is easy to use, just attach your hose and spray.  No sprayer required!  Plus, the adjustable nozzle can spray up to 25 feet for taller trees. 

Looking for a natural alternative?  Bonide Japanese Beetle Killer is a natural pyrethrum (derived from dried chrysanthemum flowers) that is safe to use on fruits, vegetables, and ornamentals.  Traps are effective, but be sure to place them far away from the plants you are trying to protect because they can attract MORE beetles.  Covering the plants with tulle is another option to protect edibles if you don’t want to spray (example: basil, rhubarb, grapes, and raspberries).  And if you have time on your hands, you can pick each beetle off and drop them in a bucket of soapy water. 

Please visit our Crystal Lake nursery and garden center at the corner of Rt 31 and Rakow Road. Our mailing addess is Cary but we are officially located in Crystal Lake at 8109 S Rt 31.


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