Ragweed Leaf Beetle vs Polydrusus Weevil
Side-by-side species comparison
| Attribute | Ragweed Leaf Beetle | Polydrusus Weevil |
|---|---|---|
| Scientific Name | Zygogramma suturalis | Polydrusus sericeus |
| Order | Coleoptera | Coleoptera |
| Family | Chrysomelidae | Curculionidae |
| Size | 6-8 mm | 5-8mm |
| Habitat | Grasslands | Hedgerows |
| Diet | Herbivores | Herbivores |
| Regions | North America (native), introduced to Russia, China, Europe | Europe |
| Conservation | Least Concern | Least Concern |
Ragweed Leaf Beetle
A brown beetle with dark longitudinal stripes on the elytra, introduced to several countries as a biocontrol agent against common ragweed. Both adults and larvae feed on ragweed foliage.
Did You Know?
It was introduced from North America to the former Soviet Union in the 1970s as biological control against ragweed, a major hay fever allergen source.
Polydrusus Weevil
A small weevil covered in brilliant green scales that sparkle in sunlight. It is commonly found on birch and hazel trees.
Did You Know?
The green coloring comes from tiny iridescent scales that rub off easily leaving the beetle looking dull brown underneath.