Spotted Cucumber Beetle
Diabrotica undecimpunctata Mannerheim, 1843
Spotted Cucumber Beetle in all of Ohio- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera
- Family
- Chrysomelidae
- Genus
- Diabrotica
Range
Where it is recorded
Season shown in 7 of Ohio's 88 counties. Explore Ohio
- No result yet (16)
- Recorded, too few records for a result (52)
- Recorded, season not shown (13)
- Season shown (7)
Counties as a table
| County | Records |
|---|---|
| Adams County | Recorded, too few records for a result |
| Allen County | Recorded, too few records for a result |
| Ashland County | Recorded, too few records for a result |
| Ashtabula County | Recorded, too few records for a result |
| Athens County | 23 · Recorded, season not shown |
| Auglaize County | No qualifying records yet |
| Belmont County | Recorded, too few records for a result |
| Brown County | Recorded, too few records for a result |
| Butler County | 103 · Season shown |
| Carroll County | No qualifying records yet |
| Champaign County | No qualifying records yet |
| Clark County | Recorded, too few records for a result |
| Clermont County | 27 · Recorded, season not shown |
| Clinton County | Recorded, too few records for a result |
| Columbiana County | Recorded, too few records for a result |
| Coshocton County | Recorded, too few records for a result |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | 149 · Season shown |
| Darke County | Recorded, too few records for a result |
| Defiance County | No qualifying records yet |
| Delaware County | 45 · Recorded, season not shown |
| Erie County | 24 · Recorded, season not shown |
| Fairfield County | 25 · Recorded, season not shown |
| Fayette County | Recorded, too few records for a result |
| Franklin County | 182 · Season shown |
| Fulton County | Recorded, too few records for a result |
| Gallia County | Recorded, too few records for a result |
| Geauga County | Recorded, too few records for a result |
| Greene County | 31 · Recorded, season not shown |
| Guernsey County | Recorded, too few records for a result |
| Hamilton County | 188 · Season shown |
| Hancock County | Recorded, too few records for a result |
| Hardin County | Recorded, too few records for a result |
| Harrison County | No qualifying records yet |
| Henry County | No qualifying records yet |
| Highland County | Recorded, too few records for a result |
| Hocking County | Recorded, too few records for a result |
| Holmes County | Recorded, too few records for a result |
| Huron County | No qualifying records yet |
| Jackson County | No qualifying records yet |
| Jefferson County | No qualifying records yet |
| Knox County | Recorded, too few records for a result |
| Lake County | 36 · Recorded, season not shown |
| Lawrence County | Recorded, too few records for a result |
| Licking County | 34 · Recorded, season not shown |
| Logan County | Recorded, too few records for a result |
| Lorain County | 24 · Season shown |
| Lucas County | 91 · Season shown |
| Madison County | Recorded, too few records for a result |
| Mahoning County | Recorded, too few records for a result |
| Marion County | Recorded, too few records for a result |
| Medina County | 38 · Recorded, season not shown |
| Meigs County | Recorded, too few records for a result |
| Mercer County | No qualifying records yet |
| Miami County | Recorded, too few records for a result |
| Monroe County | No qualifying records yet |
| Montgomery County | 53 · Recorded, season not shown |
| Morgan County | No qualifying records yet |
| Morrow County | Recorded, too few records for a result |
| Muskingum County | Recorded, too few records for a result |
| Noble County | No qualifying records yet |
| Ottawa County | Recorded, too few records for a result |
| Paulding County | Recorded, too few records for a result |
| Perry County | Recorded, too few records for a result |
| Pickaway County | Recorded, too few records for a result |
| Pike County | No qualifying records yet |
| Portage County | Recorded, too few records for a result |
| Preble County | Recorded, too few records for a result |
| Putnam County | Recorded, too few records for a result |
| Richland County | Recorded, too few records for a result |
| Ross County | Recorded, too few records for a result |
| Sandusky County | Recorded, too few records for a result |
| Scioto County | Recorded, too few records for a result |
| Seneca County | Recorded, too few records for a result |
| Shelby County | Recorded, too few records for a result |
| Stark County | 29 · Recorded, season not shown |
| Summit County | 67 · Season shown |
| Trumbull County | Recorded, too few records for a result |
| Tuscarawas County | Recorded, too few records for a result |
| Union County | Recorded, too few records for a result |
| Van Wert County | No qualifying records yet |
| Vinton County | Recorded, too few records for a result |
| Warren County | 21 · Recorded, season not shown |
| Washington County | Recorded, too few records for a result |
| Wayne County | Recorded, too few records for a result |
| Williams County | Recorded, too few records for a result |
| Wood County | 48 · Recorded, season not shown |
| Wyandot County | No qualifying records yet |
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Erie County
Not enough evidence
Records per week from 24 records in 6 of the 10 years from 2016 to 2025. Shows when people recorded it, not a season or how common it is.
Show as a table
| Week | Records of Spotted Cucumber Beetle | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 47 |
| Jan 11–17 | 0 | 0 | 75 |
| Jan 18–24 | 0 | 0 | 52 |
| Jan 25–31 | 0 | 0 | 67 |
| Feb 1–7 | 0 | 0 | 70 |
| Feb 8–14 | 0 | 0 | 21 |
| Feb 15–21 | 0 | 0 | 52 |
| Feb 22–28 | 0 | 0 | 60 |
| Mar 1–7 | 0 | 0 | 90 |
| Mar 8–14 | 0 | 0 | 90 |
| Mar 15–21 | 0 | 0 | 79 |
| Mar 22–28 | 0 | 0 | 93 |
| Mar 29 – Apr 4 | 0 | 0 | 82 |
| Apr 5–11 | 0 | 0 | 499 |
| Apr 12–18 | 0 | 0 | 555 |
| Apr 19–25 | 0 | 0 | 531 |
| Apr 26 – May 2 | 0 | 0 | 590 |
| May 3–9 | 0 | 0 | 519 |
| May 10–16 | 0 | 0 | 765 |
| May 17–23 | 0 | 0 | 697 |
| May 24–30 | 0 | 0 | 548 |
| May 31 – Jun 6 | 0 | 0 | 427 |
| Jun 7–13 | 1 | 1 | 381 |
| Jun 14–20 | 0 | 0 | 384 |
| Jun 21–27 | 0 | 0 | 273 |
| Jun 28 – Jul 4 | 0 | 0 | 316 |
| Jul 5–11 | 0 | 0 | 605 |
| Jul 12–18 | 0 | 0 | 329 |
| Jul 19–25 | 0 | 0 | 514 |
| Jul 26 – Aug 1 | 0 | 0 | 527 |
| Aug 2–8 | 2 | 2 | 409 |
| Aug 9–15 | 0 | 0 | 422 |
| Aug 16–22 | 3 | 2 | 699 |
| Aug 23–29 | 1 | 1 | 309 |
| Aug 30 – Sep 5 | 0 | 0 | 440 |
| Sep 6–12 | 1 | 1 | 392 |
| Sep 13–19 | 2 | 1 | 444 |
| Sep 20–26 | 4 | 2 | 398 |
| Sep 27 – Oct 3 | 2 | 2 | 248 |
| Oct 4–10 | 4 | 4 | 260 |
| Oct 11–17 | 0 | 0 | 148 |
| Oct 18–24 | 3 | 3 | 176 |
| Oct 25–31 | 1 | 1 | 161 |
| Nov 1–7 | 0 | 0 | 149 |
| Nov 8–14 | 0 | 0 | 78 |
| Nov 15–21 | 0 | 0 | 49 |
| Nov 22–28 | 0 | 0 | 72 |
| Nov 29 – Dec 5 | 0 | 0 | 71 |
| Dec 6–12 | 0 | 0 | 27 |
| Dec 13–19 | 0 | 0 | 29 |
| Dec 20–26 | 0 | 0 | 54 |
| Dec 27 – Jan 2 | 0 | 0 | 61 |
Reported as an adult
Only 6 records here are marked as adults, too few to show a adult season. One needs at least 20 records from 5 different years.
Reported as a larva
No records here are marked as larvae yet, so there is no larva season to show. One needs at least 20 records from 5 different years.
In Ohio
Mid-July to late October, middle week Sep 13–19
Records per week from 1,984 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.
Recorded on 783 dates. Latest record: November 2025.
Show as a table
| Week | Records of Spotted Cucumber Beetle | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 6,211 |
| Jan 11–17 | 0 | 0 | 5,146 |
| Jan 18–24 | 1 | 1 | 4,645 |
| Jan 25–31 | 0 | 0 | 4,698 |
| Feb 1–7 | 0 | 0 | 6,023 |
| Feb 8–14 | 0 | 0 | 5,888 |
| Feb 15–21 | 0 | 0 | 5,436 |
| Feb 22–28 | 0 | 0 | 6,846 |
| Mar 1–7 | 0 | 0 | 8,321 |
| Mar 8–14 | 1 | 1 | 10,384 |
| Mar 15–21 | 0 | 0 | 12,620 |
| Mar 22–28 | 0 | 0 | 13,949 |
| Mar 29 – Apr 4 | 2 | 2 | 19,661 |
| Apr 5–11 | 2 | 2 | 26,860 |
| Apr 12–18 | 0 | 0 | 39,925 |
| Apr 19–25 | 1 | 1 | 41,623 |
| Apr 26 – May 2 | 0 | 0 | 56,391 |
| May 3–9 | 3 | 2 | 52,952 |
| May 10–16 | 1 | 1 | 53,785 |
| May 17–23 | 0 | 0 | 57,698 |
| May 24–30 | 0 | 0 | 54,651 |
| May 31 – Jun 6 | 3 | 2 | 53,099 |
| Jun 7–13 | 11 | 4 | 53,700 |
| Jun 14–20 | 6 | 3 | 56,625 |
| Jun 21–27 | 13 | 6 | 55,361 |
| Jun 28 – Jul 4 | 21 | 7 | 58,477 |
| Jul 5–11 | 15 | 7 | 61,336 |
| Jul 12–18 | 16 | 6 | 64,722 |
| Jul 19–25 | 38 | 8 | 69,753 |
| Jul 26 – Aug 1 | 54 | 9 | 59,416 |
| Aug 2–8 | 76 | 9 | 59,712 |
| Aug 9–15 | 94 | 10 | 55,994 |
| Aug 16–22 | 92 | 10 | 54,328 |
| Aug 23–29 | 109 | 10 | 51,772 |
| Aug 30 – Sep 5 | 145 | 10 | 57,167 |
| Sep 6–12 | 155 | 10 | 59,075 |
| Sep 13–19 | 176 | 10 | 54,543 |
| Sep 20–26 | 172 | 10 | 45,860 |
| Sep 27 – Oct 3 | 220 | 9 | 43,180 |
| Oct 4–10 | 194 | 10 | 37,841 |
| Oct 11–17 | 129 | 10 | 30,824 |
| Oct 18–24 | 98 | 9 | 21,156 |
| Oct 25–31 | 76 | 9 | 19,021 |
| Nov 1–7 | 23 | 6 | 14,172 |
| Nov 8–14 | 22 | 7 | 12,621 |
| Nov 15–21 | 7 | 3 | 7,965 |
| Nov 22–28 | 0 | 0 | 8,136 |
| Nov 29 – Dec 5 | 0 | 0 | 6,083 |
| Dec 6–12 | 1 | 1 | 6,004 |
| Dec 13–19 | 3 | 3 | 5,423 |
| Dec 20–26 | 0 | 0 | 5,661 |
| Dec 27 – Jan 2 | 4 | 4 | 8,459 |
Reported as an adult
Usually reported as an adult mid-July to late October, middle week Sep 13–19.
From 446 records that are marked as adults. Not every photo is marked with a life stage, so this shows when people reported it as an adult, not when adults are about.
Reported as a larva
No records here are marked as larvae yet, so there is no larva season to show. One needs at least 20 records from 5 different years.
What these results show
These results show when people recorded a species, not when or where it occurs. Missing weeks and low counts do not mean absence or scarcity, and counts are not abundance. Contributed records reflect where, when and what people chose to observe.
Identification
How to identify it
Often confused with
- Bean Leaf Beetle Cerotoma trifurcataOften confused in Ohio: 14 identifications in Ohio named one where the other was meant
- Asian Lady Beetle Harmonia axyridis57 identifications worldwide named one where the other was meant
- Fourteen-spotted Lady Beetle Propylea quatuordecimpunctata12 identifications worldwide named one where the other was meant
- Spotted Pink Lady Beetle Coleomegilla maculata12 identifications worldwide named one where the other was meant
From iNaturalist’s similar-species counts, refreshed monthly: confusions in Ohio first, then worldwide. Only species with an Ohio result are listed.
Months not reported
- Jan: recorded
- Feb: no record
- Mar: recorded
- Apr: recorded
- May: recorded
- Jun: recorded
- Jul: recorded
- Aug: recorded
- Sep: recorded
- Oct: recorded
- Nov: recorded
- Dec: recorded
Not reported in Ohio in February, 2016 to 2025.
Land cover where it is recorded
| Land cover | Its recordsAll Ohio records |
|---|---|
| Developed | 70%49% |
| Farmland | 13%11% |
| Forest | 11%31% |
| Wetland | 3%5% |
| Barren | 1%0.6% |
| Open water | 1%3% |
| Grassland and shrub | 0.6%0.9% |
From 1,188 records placed within 100 m, beside all Ohio records placed the same way. People record where they go, so this shows where records come from, not where the species lives. Land cover: USGS Annual NLCD, 2025 (opens in a new tab)
Finer identifications
Some Ohio records of this species were identified to a subspecies:
- Diabrotica undecimpunctata howardiEastern Spotted Cucumber Beetlesubspecies
Every one of these records counts toward the Spotted Cucumber Beetle's season above.
Why some records go further than species
Many species vary from place to place. Groups of a species that look or sound a little different, and live in different areas, can be named as subspecies. Observers and experts only identify a record that far when it shows enough detail to tell them apart. Records without that detail count at the species level.
Names: Catalogue of Life.
Sources
Where these results come from
- Records from iNaturalist research-grade observations and expert-identified GBIF datasets, CC0, CC BY and CC BY-NC. Sources
- Seasons use the published method and its evidence thresholds. Methods
- See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.
Records behind the Ohio result
1,984 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 1,972 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
- iNaturalist observations (opens in a new tab) · iNaturalist.org · 12 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 2026-11-13
To cite: the GBIF download doi:10.15468/dl.y2jkt8 (opens in a new tab).
A spreadsheet (CSV) with a link to each record, on iNaturalist or GBIF. Records whose location was hidden by the observer or the source are counted but not linked.