Diabrotica undecimpunctata
| Literature database |
|---|
| 115 articles sorted by: |
| • year (descending) |
| • research topics |
| • countries/regions |
| • host plants |
| • list of natural enemies |
Diabrotica undecimpunctata Mannerheim, 1843
This beetle is a serious pest of cucurbits and maize in North America. It also attacks various other crops. The adults damage seedlings and females lay their eggs at the base of the host plants. The emerging larvae infest the roots, stem and fruits. It transmits the bacterial wilt of cucurbits (Erwinia tracheiphila). The adults are around 6 mm long and usually have 12 spots on the elytra, sometimes 11 (undecimpunctata = 11-spotted). Several forms or subspecies have been described with crop damage being mainly caused by the following:
The western spotted cucumber beetle or spotted cucumber beetle is the typical form (Diabrotica undecimpunctata undecimpunctata) and is found in western North America. It infests mainly cucurbits, but also maize, beet, rice and other crops. It can be distinguished by the legs and abdomen being entirely black (partly pale in the other forms)
| Vernacular names | |
|---|---|
| • English: | southern corn rootworm spotted cucumber beetle western spotted cucumber beetle |
| • Français: | chrysomèle maculée du concombre |
The southern corn rootworm, Diabrotica undecimpunctata howardi, is found in parts of North America east of the Rocky Mountains and is an important pest of maize but will also infest cucurbits. It can be distinguished by the legs and the abdomen being party pale. Usually only the femora of the legs are pale and the spots on the elytra are usually smaller than in the other forms.
Diabrotica undecimpunctata duodecimnotata is found in Mexico, where it infests sunflowers, alfalfa and other crops. It can be distinguished by its size and the colour of the legs and abdomen.
- Other images of Diabrotica undecimpunctata (IPM Images and PaDIL - click to enlarge)
on broccoli
larva in maize seedling
head
head
pronotum
