Lawn Diseases
Best Grub Killer: Two Actives, and One Aisle Full of Wrong Ones
MSU names six actives that should not be used for grub control at all — and some bags sold as grub killers contain exactly those. Two molecules do the work.
Grub Curative (granular)
BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules Review
★★★★☆ 4.2/5
our editor rating how we score$22–$30 (10 lb)
Typical price · 10 lb treats 5,000 sq ft for white grubs, billbugs and mole crickets, or 7,500 sq ft for other listed lawn pests; 20 lb treats 10,000 and 15,000 respectively
Affiliate links — see our disclosure. Commissions never influence verdicts.
The retail trichlorfon product — the active MSU Extension names for CURATIVE grub control, applied late August or early September against grubs already feeding. Its counterpart, chlorantraniliprole, is preventive and belongs in May or June.
Our Verdict
This is the correct chemistry for a lawn that is already losing turf, and it is the only widely available residential trichlorfon product. Two things keep it from a higher rating, and neither is the product's fault. MSU's measured range for curative treatment is 20–80% of grubs killed when applied in September and 20–55% in late October — that is the ceiling of the approach rather than of this bag. And the label forbids hand-held or chest-mounted spreaders, which is the applicator most people reach for on a small lawn.
✅ Pros
- Trichlorfon is the active MSU Extension names for curative grub control, timed to late August or early September
- Labelled FOR OUTDOOR RESIDENTIAL USE ONLY, unlike the Dylox 6.2 professional formulation of the same chemistry
- Works on contact once watered in, so results are visible quickly rather than over weeks
- Also listed for billbugs, chinch bugs, cutworms, armyworms, European crane flies and ticks
⚠️ Cons
- Curative only — MSU measures 20–80% control applied in September and 20–55% in late October, so it is a rescue with a known ceiling rather than a fix
- The label prohibits application with a hand-held or chest-mounted spreader, which rules out the applicator most small-lawn owners have
- Must be watered in thoroughly within 24 hours or it does not reach the root zone where grubs feed
- Children and pets may not re-enter until the treated area has been watered and allowed to dry
- Label directs against application near fish pools, ponds, streams or lakes, and against waterlogged soil
Product type
Grub Curative (granular)
Active ingredient
Trichlorfon 9.3% (granular)
Price range
$22–$30 (10 lb)
Coverage
10 lb treats 5,000 sq ft for white grubs, billbugs and mole crickets, or 7,500 sq ft for other listed lawn pests; 20 lb treats 10,000 and 15,000 respectively
Best for
A lawn with active grub damage in late August or September, where the preventive window has already passed
our editor rating
4.2 out of 5
Where our facts come from
Label read on EPA's label database
EPA Reg. No. 92564-40
We opened this product's accepted label on EPA's own Pesticide Product Label System — the strongest source available for what a product is registered to do.
What we found when we read it
Label read 2026-08-19 on EPA PPLS. EPA Reg. 92564-40, registered name 'Dylox 9.3% Insect Granules', trichlorfon 9.3%. The alternate brand names on the label include 'BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules' — so the retail bag is this Dylox registration under a consumer name, and it is NOT the Dylox 6.2 professional product, which is a separate registration (432-1308). Label rate for grubs, billbugs and mole crickets is 2 lb per 1,000 sq ft; 1.33 lb for the other listed pests. The label states 'Use this product only when grubs or other listed pests are present' — curative positioning from the registrant, not our interpretation. Three restrictions worth surfacing because they are easy to breach: 'Do not apply with hand-held or chest mounted spreader', 'Water thoroughly within 24 hours after applying', and 'Do not mow until the granules are watered in and the grass has dried'. Retailer rating omitted rather than estimated.
Where this page and the container disagree, the container wins — the label is the legal authority on rates and restrictions. How to read one yourself.
Where This Product Matters
Matched against each state's actual disease, weed and pest pressure.
Alabama
Alabama hub →Fall armywormsChinch bugs (St. Augustine)White grubs
Alaska
Alaska hub →Cutworms
Arizona
Arizona hub →White grubsFall armyworms (monsoon season)
Arkansas
Arkansas hub →Fall armyworms (the Delta's row crops keep the pressure high, and lawns catch the overflow)White grubsChinch bugs
California
California hub →White grubs (masked chafer)Armyworms and cutwormsBillbugs
Colorado
Colorado hub →BillbugsWhite grubs (Japanese beetle, established in the Denver area)
Connecticut
Connecticut hub →Chinch bugs (sunny, dry, sandy strips — the shoreline and the road edge)
Delaware
Delaware hub →White grubs — Japanese beetle and masked chafer, and the sandy Sussex soils make egg-laying easyChinch bugs (hot dry sand along drives, walks and the beach-town lots)Billbugs
Florida
Florida hub →Southern chinch bugsFall armywormsWhite grubs
Georgia
Georgia hub →Fall armywormsWhite grubsChinch bugs (coastal St. Augustine)
Hawaii
Hawaii hub →Chinch bugs on St. AugustineBillbugs and white grubs
Idaho
Idaho hub →White grubs, a lighter pressure here than in the humid MidwestCutworms
Illinois
Illinois hub →White grubs (masked chafer and Japanese beetle)BillbugsChinch bugs (sunny south-facing slopes)
Indiana
Indiana hub →White grubs (scout from July, damage shows in September)BillbugsChinch bugs
Iowa
Iowa hub →White grubs (masked chafer)Black cutworms and armyworms, arriving on spring storm fronts into a crop landscapeBillbugs
Kansas
Kansas hub →White grubs from masked chafer, May and June beetles and Japanese beetleChinch bugs, a perennial Kansas pest across essentially every turf type rather than a coastal or sandy-soil specialistCutworms
Kentucky
Kentucky hub →White grubsFall armywormsBillbugs (zoysia and bluegrass)Chinch bugs (dry sunny banks)
Louisiana
Louisiana hub →Southern chinch bugs (primarily a St. Augustine problem)Fall armyworms
Maine
Maine hub →Chinch bugs (dry sandy strips along the coast and the river valleys)White grubs generally — with the caveat that in Portland and South Portland the lawful response is an organic one
Maryland
Maryland hub →White grubs (Japanese beetle heartland)Hairy chinch bugsBillbugsFall armyworms (late-summer flare years)
Massachusetts
Massachusetts hub →White grubs (European chafer and Japanese beetle)Hairy chinch bugs
Michigan
Michigan hub →White grubs (Japanese beetle larvae)
Minnesota
Minnesota hub →White grubs
Mississippi
Mississippi hub →Fall armyworms (Delta row crops keep populations high and lawns pay for it)Chinch bugs (St. Augustine)White grubs
Missouri
Missouri hub →White grubsFall armyworms (late-summer invasions)Billbugs (zoysia)Chinch bugs (sunny southern slopes)
Montana
Montana hub →White grubs, a lighter pressure here than in the humid MidwestCutworms
Nebraska
Nebraska hub →White grubs from masked chafer and May and June beetlesChinch bugsCutworms
Nevada
Nevada hub →BillbugsWhite grubs
New Hampshire
New Hampshire hub →Chinch bugs (dry sunny sand along the river valleys)
New Jersey
New Jersey hub →White grubs (Japanese beetle larvae)Chinch bugsBillbugs
New Mexico
New Mexico hub →White grubs from May and June beetles and masked chaferChinch bugs in hot dry sandy strips, which describes most of the stateCutworms and armyworms in monsoon years
New York
New York hub →White grubs (Japanese beetle larvae)Chinch bugs
North Carolina
North Carolina hub →White grubs (Japanese beetle larvae)Armyworms
North Dakota
North Dakota hub →White grubs from May and June beetles, a lighter pressure here than in the corn-belt statesCutworms
Ohio
Ohio hub →White grubs (Japanese beetle and masked chafer larvae — Ohio's #1 pest)BillbugsHairy chinch bugs
Oklahoma
Oklahoma hub →White grubsFall armyworms (the late-summer event that strips a lawn in days)Chinch bugs
Oregon
Oregon hub →BillbugsWhite grubs (east side)
Pennsylvania
Pennsylvania hub →White grubs (Japanese beetle heartland)Hairy chinch bugsBillbugs
Rhode Island
Rhode Island hub →Chinch bugs (South County sand and sunny road edges)
South Carolina
South Carolina hub →White grubs
South Dakota
South Dakota hub →White grubs from May and June beetles, a lighter pressure than in the states east of hereCutworms
Tennessee
Tennessee hub →White grubsFall armyworms (August invasions)Billbugs (zoysia)
Texas
Texas hub →Chinch bugsWhite grubs (June beetle larvae)Fall armyworms
Utah
Utah hub →Billbugs (the Wasatch Front's most misdiagnosed lawn insect — the damage reads as drought)White grubs
Vermont
Vermont hub →White grubs generally — and in Vermont the product question is settled by law before it is settled by agronomyChinch bugs (dry sandy strips in the valleys)
Virginia
Virginia hub →White grubs (Japanese beetle and masked chafer larvae)Fall armyworms (late-summer outbreaks)Chinch bugs
Washington
Washington hub →Lawn billbugs (eastern Washington only — not yet detected west of the Cascades)CutwormsWhite grubs (present but rarely reaching pest levels here)
West Virginia
West Virginia hub →White grubs from Japanese beetle and masked chaferCutworms
Wisconsin
Wisconsin hub →White grubs
Wyoming
Wyoming hub →White grubs, a light pressure here compared with the humid MidwestCutworms
Common questions
Common Questions
How much does BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules cost?
BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules typically runs $22–$30 (10 lb), covering 10 lb treats 5,000 sq ft for white grubs, billbugs and mole crickets, or 7,500 sq ft for other listed lawn pests; 20 lb treats 10,000 and 15,000 respectively.
What does BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules treat?
BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules targets White grubs, Billbugs, Chinch bugs, Cutworms, Fall armyworms.
What is the active ingredient in BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules?
Trichlorfon 9.3% (granular), registered under EPA Reg. No. 92564-40.
What is the biggest downside of BioAdvanced 24-Hour Grub Killer Plus Ready-To-Spread Granules?
Curative only — MSU measures 20–80% control applied in September and 20–55% in late October, so it is a rescue with a known ceiling rather than a fix
Real feedback
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