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Japanese Beetle Control

Natural Solutions Controlling Japanese Beetles
 
Japanese Beetle Adult
Japanese Beetle, Popillia japonica
Gardens and lawns can be devastated by Japanese Beetles. Learn how you can control them with these organic solutions.

These common pests feed on over 275 plant species. This includes all deciduous tree fruits, many small fruits, vegetables, grasses, and weeds.

Many gardeners and homeowners consider the Japanese Beetle to be one of the most serious pests they face. These pests cause devastating root damage in their grub phase (particularly to lawns), but also attract various critters that will dig up your lawn searching for the grubs to eat. The adult beetles can defoliate plants faster than you can say Popilla japonica.

Japanese Beetle Life Cycle
Photo Credit: UNL Entomology Department.

Japanese beetle grubs overwinter 8-10 inches (20-25 cm) deep in the soil. As spring temperatures increase, the grubs move up in the soil to feed on grass and other small roots. They pupate in late May to June and adults start emerging in late June to mid-July. Adults live from 30 to 45 days, feed through late summer or early fall. They feed on decaying matter but soon feed on roots as they move deeper to an overwintering site.

Control Japanese Beetles with a comprehensive plan of attack. Here’s how:

  1. Treat with a combination of Milky Spore and NemaSeek Beneficial Nematodes in either the spring or the fall. The nematodes help to distribute the Milky Spore. This combination of organisms also works synergistically to most effectively control the grubs. In warm climates you will achieve excellent long-term control after applying Milky Spore once per year for 3 years. In colder climates it may take up to 5 years to achieve long term control.

  2. Apply quality humus and essential soil additives. John & Bob's Soil
    Optimizer
    is an excellent choice. Grubs don't attack healthy roots.

  3. Trap the adults in the summer when they emerge. Just shake them into soapy water!

  4. Use a neem oil product like Monterey 70% Neem Oil to control adults that elude your traps and also to discourage them from feeding.

  5. Treat again with NemaSeek beneficial nematodes six months after your first application to further distribute the Milky Spore and to eliminate newly developing grubs.

Click on the products below for more info and ordering.

Japanese Beetle Map
You may have a different kind of beetle if you don't live in the areas above.
Japanese beetle damage
Japanese Beetle damage.

Identifying Japanese Beetles:

Adult Japanese beetles are 3/8-1/2 inch (8-10 mm) long, metallic green to greenish bronze with coppery red wings and small white tufts on the sides and tip of the abdomen.

Larvae are "C"-shaped, cream-colored white grubs with brown heads that reach 3/4 - 1 inch (20-25 mm) long when mature.

Japanese beetle grub
Japanese Beetle grub.
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NemaSeek Beneficial Nematodes - Hb
Seeks Out Stationary Pests including Grubs, root zone weevils, citrus weevils, Japanese beetles, black vine weevils, ticks, queen ants/termites and more. Great for lawns, fields, pastures and orchards.

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Milky Spore Powder
Control Japanese beetle grubs with this easy-to-use biological.

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All Purpose Dispenser Tube
Dispenser holds up to 40 oz. of powdered material or fertilizer.

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$14.50
Qty.
Chameleon Adaptable Hose End Sprayer
Great for applying beneficial nematodes, liquid fertilizers, insecticides, or herbicides.

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$14.75
Qty.
BONIDE<sup>®</sup> Neem Oil Concentrate - 1 Pt.
Multi-purpose concentrate works as a fungicide, insecticide and miticide.

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$17.98
Qty.
Monterey 70 % Neem Oil - 1 pt
OMRI LISTED. 70% Neem Oil Concentrate That is Effective Against Pest Insects and Fungal Diseases.

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$19.90
Qty.
Safer<sup>®</sup> Brand BioNEEM® Insecticide and Repellent - 16 oz. Concentrate Model #5612
OMRI LISTED. This organic insecticide eliminates pests on contact.

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$18.00
Qty.
John & Bob's Soil Optimizer
OMRI LISTED. Rejuvenates the soil to facilitate healthy plant growth.

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Beneficial Nematodes
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