Frankliniella occidentalis
| Frankliniella occidentalis | ||||||||||
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California flower thrips |
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| Systematics | ||||||||||
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| Scientific name | ||||||||||
| Frankliniella occidentalis | ||||||||||
| ( Pergande , 1895) |
Frankliniella occidentalis , also called Californian flower thrips , is a polyphagous fringed winged species fromthe Thripidae family . The species has spread almost worldwide over the past 25 years. Before, the focus was in the southwest of the USA . On the cotton fields there , the species is considered a pest, as it oftentransmitsthe tospovirus (family Bunyaviridae ). On the other hand, it is a predatory mite predator . Frankliniella occidentalis is also considered a pollinator of the kidney bean ( Phaseolus vulgaris ) and the onion ( Allium cepa ).
features
The females of Frankliniella occidentalis have a yellowish to brownish body color and are 1.3–1.9 mm in size. Animals that transmit the tospovirus are usually dark yellow and the central tergites are stained. The second and the sixth to eighth segment of the antennae are brown, while the third to fifth are yellow and only brownish towards the tip. There is also a forked sensory cone on the third and fourth segments . The legs are yellowish except for darker spots. The long front wings are light and have dark bristles. The male is generally lighter than the female and slightly smaller.
Development and propagation
The development of the Californian flowering thrips is strongly temperature-dependent. Most of the specimens are female and reproduce via arrhenotokic parthenogenesis .
Combat
The California flowering thrips is a difficult pest to control in strawberry cultivation. He is against both in Germany nor approved crop protection agents ( abamectin and lambda-cyhalothrin resistant).
literature
- Moritz, Gerald: Thrips . Die Neue Brehm-Bücherei Vol. 663. Westarp Sciences, Hohenwarsleben 2006, ISBN 3-89432-891-6
Web links
Individual evidence
- ↑ The Return of the California Flower Thrip March 4, 2010 (Wayback Machine, October 30, 2019)