Loxostege sticticalis
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Loxostege sticticalis (Linnaeus) - (beet webworm)
The beet webworm is a polyphagous and migrating pest, occurring across Europe to temperate parts of Asia and has been also introduced into North America. The larvae feed on the leaves of various crops and can infest for example clover, alfalfa, beet or legumes. In Russia and Asia, outbreaks develop periodically (approximately once in 10 years) and last several years. While there are few reports of crop damage in Europe, the outbreaks in Russia and Asia can cause complete destruction of crops. Some outbreaks may extend over millions of hectares and in 1929 about 60% of the sugar beet fields in Russia were infested.
| Vernacular names | |
|---|---|
| • Deutsch: | Rübenzünsler Wiesenzünsler |
| • English: | beet webworm |
| • Español: | palomilla de la remolacha |
| • Français: | pyrale de la betterave |
There are 5 larval instars and 2-5 generations per year. The larvae enter the soil for pupation and pupae of the last generation overwinter. During the summer, one generation might develop in little more than 1 month. Females have a wing-span of 20-25 mm, males are smaller. The adults have brownish forewings with variable darker markings. The caterpillars are greyish green up to dark grey and almost black.
Synonyms:
Pyrausta sticticalis
- Other images of Loxostege sticticalis (IPM Images - click to enlarge)
caterpillar
