Should you spray Japanese Beetles when using Milky Spore

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No agreement on how to deal with Japanese beetles

“Milky Spore Safely Kills Japanese Beetle Grubs Produced to USDA standards, Milky Spore is the safest material ever developed for control over the larvae (grubs) of Japanese Beetles. Milky Spore is a naturally occurring host specific bacterium (Bacillus popillae-Dutky) that targets and discriminately works to attack the white grubs of Japanese Beetles as they feed on the roots of grass and other vegetation in your yard Milky Spore is not harmful to beneficial insects, birds, bees, pets or man. The product is approved and registered with EPA.”

Milky spore Paenibacillus popilliae Wikipedia

“During the larval stage, the Japanese beetle lives in lawns and other grasslands, where it eats the roots of grasses. During that stage, it is susceptible to a fatal disease called milky spore disease, caused by a bacterium called milky spore, Paenibacillus (formerly Bacillus) popilliae. The USDA developed this biological control and it is commercially available in powder form for application to lawn areas. Standard applications (low density across a broad area) take from one to five years to establish maximal protection against larval survival (depending on climate), expanding through the soil through repeated rounds of infection, in-vers can be used to exclude the beetles; however, this may necessitate hand pollination of flowers.”

Japanese beetle Wikipedia beetle species Popillia japonica


Control of Japanese Beetle Adults and Grubs in Home Lawns

“The bacterial milky diseases, Bacillus popilliae Dutky, has been quite effective at controlling the grubs in certain areas of the eastern United States. The spore count must build up for 2 to 3 years to be very effective and during this time you should not use an insecticide against the grubs that are needed to complete the bacterium cycle.”

Controlling Japanese Beetles – The Homeowner’s Column – University of Illinois Extension

The Beetles of Summer – Japanese Beetles

Kaolin spray – Wikipedia

Japanese Beetles in the Urban Landscape University of Kentucky Entomology

Interesting – don’t recall seeing Milky Spore mentioned as being sold under the Japidemic Doom name previously.

Japanese Beetle Management in Minnesota

Japanese Beetle Colorado State University

Japanese beetle menu expanding; gardeners on edge

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