BeneficialJapanese beetle

Bt galleriae (beetleGONE!) for Japanese beetles

Bacillus thuringiensis subsp. galleriae strain SDS-502 · microbial beetle control

Against japanese beetle

A biological spray with field-trial evidence against the adults. In Kentucky trials, weathered Btg residues cut Japanese beetle feeding on roses and lindens for 3–14 days, and Minnesota Extension rates it moderately effective for one to two weeks. It protects the leaves rather than wiping out the beetles: most beetles that had fed on treated leaves could still fly a day later. Keep it off milkweed, because it killed 97–100% of young monarch caterpillars in the same study.

RateMaker's rate — beetleGONE! 2–4 oz per gallon of water, sprayed on foliage where beetles are feeding

TimingWhile adults are feeding; the maker says to respray every 7–10 days and not to let rain or irrigation wash it off the leaves

macro · bt galleriae (btg) on japanese beetle

The pestJapanese beetlePopillia japonicaAdults skeletonise leaves and eat flowers; grubs chew lawn rootsFull pest profile →

Before you order

A strain of Bt that makes a toxin active against scarab beetles. Sprayed on leaves (beetleGONE!), it cut Japanese beetle feeding for 3–14 days in Kentucky trials. As lawn granules (grubGONE!), university results range from failure to good control. It kills monarch caterpillars, so keep it off milkweed. How it works, how to tell it has established and the supplier list are on the full Bacillus thuringiensis subsp. galleriae strain SDS-502 profile.

Other controls for japanese beetle

Heterorhabditis bacteriophoraNematode · 250k–500k /m²; BASF: 25–50 million per 1,000 ft² of turf
Ground beetlesWild predator · wild, attract it
Rove beetlesWild predator · wild, attract it

Bt galleriae (beetleGONE!) for Japanese beetles

Before you order

Other controls for japanese beetle

Bacillus thuringiensis subsp. galleriae strain SDS-502 against other pests