Japanese Beetles across the plant library
21 of the 505 plant guides in this library name japanese beetles among their pests. Every one is listed below, linked to its guide and grouped by the kind of plant it is, so you can see at a glance which corners of a garden it turns up in.
This is the library read down a column instead of across a row. Each plant guide names its own pests; nobody publishes the other view — which of the plants you actually grow share one, and whether the timing they record agrees.
The 21 plants that list japanese beetles
Grouped by plant type. Where the library attached a note to the entry — “rare”, “on seedlings”, “in wet clay” — that note is printed next to the plant, verbatim, because two plants can name the same pest and mean opposite things by it.
trees4
shrubs8
vines2
perennial1
biennial1
Where it concentrates
Botanical families with more than one affected plant in the library, counted from the same 21 guides above. 5 of 21 are Malvaceae.
- Malvaceae5 plants
- Rosaceae5 plants
- Asteraceae2 plants
How the library qualifies it
Every distinct note the guides attach to an entry for japanese beetles, verbatim, with how many plants carry it. The other 18 guides list it bare, with no qualifier at all.
- love it
- minor
- sacrificially — better it than your roses
Shared timing — and where it doesn’t agree
Only one guide in the library records a timing for japanese beetles. A single entry cannot agree or disagree with anything, so there is no shared window to report and none is invented here. It is reproduced below exactly as the library holds it.
Quoted verbatim from the spray-timing fields of the guides that name japanese beetles. Another 13 of the 21 record a program aimed at a different problem; those stay on their own guides.
- Growing
- Monitor for Japanese Beetles (manual remove). SWD: Insecticide as berries turn purple if detected.
Timing only — the label is the law
This page reports when the guides in this library say to watch for japanese beetles and when a treatment is worth considering. It is not a recommendation to apply any product. Read and follow the product label before you spray — under federal law the label is the legal instruction, and using a pesticide against it is illegal.
- Check the pre-harvest interval. Every product that’s cleared for an edible crop sets a minimum number of days between spraying and picking. Find it on the label before you spray anything you intend to eat.
- Check the re-entry interval before you or anyone else works in the treated area again, and use the protective equipment the label names.
- Confirm the product is registered for your crop in your state. This page groups many different crops together, and a product legal on one of them is not legal on all of them — state registrations differ too. Your state pesticide agency or local extension office can confirm both.
- Rates and mixing instructions come from the label, never from us. We don’t publish them because they differ by product and formulation.
What else these plants get
Counted over the same 21 guides: the other problems most often listed on a plant that lists japanese beetles. These are co-occurrences in the library’s own records, not a claim that one causes another.