# Striped Cucumber Beetle (*acalymma vittatum*)

The Striped Cucumber Beetle (Acalymma vittatum) is a prominent and widespread insect native to North America, known primarily as a major agricultural pest of cucurbit plants. While they pose a significant challenge for gardeners and farmers who grow cucumbers, squashes, and melons, these beetles are fascinating subjects of chemical ecology. They have developed a highly specialized relationship with their host plants, utilizing the plants' own chemical defenses as cues for feeding and mating.

- **Category:** [Insects](https://www.snappit.app/explore/categories/insect)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 2
- **Habitat:** Found in agricultural fields, home vegetable gardens, and wild meadows where cucurbit plants grow.

![Striped Cucumber Beetle](https://inaturalist-open-data.s3.amazonaws.com/photos/8461942/medium.jpg)

Photo: Katja Schulz, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/8461942)

## Appearance

This small, elongated beetle typically measures between 5 and 7 millimeters in length. It is easily recognized by its striking coloration: its wing covers (elyra) are bright yellow-to-orange and marked with three distinct, black longitudinal stripes running down its back. Its head and long antennae are dark brown or black, while its thorax matches the bright yellow of its body, and its underside is completely black.

## Taxonomy

- **Kingdom:** Animalia
- **Phylum:** Arthropoda
- **Class:** Insecta
- **Order:** Coleoptera
- **Family:** Chrysomelidae
- **Genus:** Acalymma

## Interesting facts

- The beetles hibernate through the winter as adults, hiding in nearby woodlands or heavy crop residue until spring.
- They are actually stimulated to eat more by the bitter defenses (cucurbitacins) that plants produce to keep other pests away.
- While adult beetles are highly visible above ground, their larvae live entirely in the soil, feeding on plant roots.

## Special abilities

- **Cucurbitacin Attraction:** The beetle possesses highly specialized chemical receptors that allow it to detect and home in on extremely faint traces of bitter defensive chemicals produced by cucumber-family plants.
- **Bacterial Wilt Vectoring:** It acts as a primary vector for the devastating plant pathogen Erwinia tracheiphila, harboring the bacteria in its gut and transmitting it to plants through feeding wounds.
- **Chemical Sequestration:** Adult beetles are capable of absorbing and storing toxic compounds from their food, making themselves unpalatable to potential predators.

## Measurements & details

- **Length:** 0+ cm
- **Weight:** 0+ kg
- **Lifespan:** 0+ years
- **Clutch Size:** 200+
- **Incubation:** 5+ days

## Diet & Feeding

Adults feed heavily on the leaves, flowers, and fruit of cucumber family plants, while the subterranean larvae feed exclusively on the roots.

- **Primary Foods:** Cucumber leaves, Squash blossoms, Pumpkin stems, Melon rind
- **Foraging Method:** Foraging

## Ecological connections

- **Host plant:** [Cucumber](https://www.snappit.app/explore/cucumber) (*Cucumis sativus*) — The beetle feeds on the foliage, stems, and flowers of this host, often transmitting bacterial wilt in the process.
- **Eaten by:** Spined Soldier Bug (*Podisus maculiventris*) — This generalist predatory bug actively hunts and feeds on both the larval and adult stages of the beetle.
- **Parasite:** Tachinid Fly (*Celatoria diabroticae*) — A specialized parasitoid fly that lays its eggs inside adult cucumber beetles, eventually killing them.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify Striped Cucumber Beetle?

Look for hard wing covers meeting in a line down the back, then compare the antennae, body shape, legs and markings. Metallic colors shift a lot with lighting. Beetle Identifier: upload a photo and compare the visible details.

### How long is Striped Cucumber Beetle?

0+ cm

### How much does Striped Cucumber Beetle weigh?

0+ kg

### How long does Striped Cucumber Beetle live?

0+ years

### What does Striped Cucumber Beetle eat?

Adults feed heavily on the leaves, flowers, and fruit of cucumber family plants, while the subterranean larvae feed exclusively on the roots.

### Where is Striped Cucumber Beetle usually found?

Found in agricultural fields, home vegetable gardens, and wild meadows where cucurbit plants grow.

### How does Striped Cucumber Beetle hunt?

Foraging

### How many eggs does Striped Cucumber Beetle lay?

200+

## Where to spot

- [Chantilly Park](https://www.snappit.app/guides/places/chantilly-park) — Virginia, US · Park
- [Hudson Falls Historic District](https://www.snappit.app/guides/places/hudson-falls-historic-district) — New York, US · Historic District
- [Duke Farms](https://www.snappit.app/guides/places/duke-farms) — New Jersey, US · Nature Reserve

[View all places to see Striped Cucumber Beetle](https://www.snappit.app/guides/where-to-see/striped-cucumber-beetle)

## More Insects

- [Common Eastern Bumble Bee](https://www.snappit.app/explore/common-eastern-bumble-bee) (*Bombus impatiens*)
- [Spotted Lanternfly](https://www.snappit.app/explore/spotted-lanternfly) (*Lycorma delicatula*)
- [Brown-belted Bumble Bee](https://www.snappit.app/explore/brown-belted-bumble-bee) (*Bombus griseocollis*)
- [Eastern Carpenter Bee](https://www.snappit.app/explore/eastern-carpenter-bee) (*Xylocopa virginica*)

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Source: [Striped Cucumber Beetle: Facts & Places to See — Snappit](https://www.snappit.app/explore/striped-cucumber-beetle)