Sycamore net bug
| Sycamore net bug | ||||||||||
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Sycamore net bug ( Corythucha ciliata ), Kozarska Dubica 2019 |
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| Corythucha ciliata | ||||||||||
| ( Say , 1832) |
The plane tree net bug ( Corythucha ciliata ) belongs to the family of net bugs (Tingidae). The German name reveals their preferred location on plane trees ( Platanus ). Originally native to North America, it was introduced to Europe and has spread continuously across the continent since the 1960s.
Distribution and habitats
The original home of the plane tree net bug is North America with a distribution center in the northwest of the United States and western Canada. In Europe, it was first detected in the 1960s in the area around Padua in northern Italy. From there it has spread rapidly to southern Europe and southern central Europe. In the south-west it has reached the Iberian Peninsula , in the east it has advanced to Hungary and the Czech Republic and in the south-east it has settled the Balkan Peninsula (Bulgaria, Greece). The latest locations are in the north of the Black Sea in Russia. It went north along the Rhone in France and later over the Upper Rhine Plain to Germany in the Rhine-Main area in 1983 . The bug often occurs in large numbers in cities. The animals are good fliers and are also easily drifted by the wind. Apparently they are also dragged along the main traffic routes in vehicles, which undoubtedly contributed to the rapid spread of the bug.
The insects live on different types of plane trees. In Europe these are mainly Platanus occidentalis , Platanus x acerifolia (= Platanus x hybrida ) and only rarely Platanus orientalis .
Features and way of life
The plane tree net bug is relatively small with body lengths between 3.3 and 3.7 millimeters. Your body is black. Your pronotum and hemielytras are white. They show the mesh-like pattern characteristic of the Tingidae family. The sides of the pronotum are widened and slightly curved upwards. Towards the front it is pulled out, covering the head, in a hood-like formation (neck bladder). At the back, the pronotum, which is pulled out into a point, covers the scutellum .
The animals eat exclusively vegetable ( phytophag ) and apparently only the genus Platanus offers suitable food. Both the adult insects ( imagines ) and the larvae suck the leaf tissue. In doing so, they leave blackish droppings on the underside of the leaves. In the event of a mass infestation, the trees show signs of yellowing with premature leaf fall. Observations show that the bug has enemies in Europe too, for example the forest guard ( Arma custos ). It is anecdotal that the plane tree net bug, like other soft bugs, stung people.
The hemimetabolic bugs hibernate in the adult stage under the loose bark of the plane trees or in more distant hiding places. After mating, eggs are laid on the underside of the leaves in May. The eggs are superficially glued in groups along the main nerves. The larvae of the first three stages remain united in a group at the oviposition site. The next last two stages disperse and get onto other leaves and trees. Depending on the geographical location, one to three generations are formed. In the warm Mediterranean climate there can be up to three in Germany, on the other hand, only one is trained.
supporting documents
Individual evidence
- ↑ Hans-Jürgen Hoffmann: Psallus varians-a bug "plays crazy" (Heteroptera, Miridae). In: Heteropteron, issue 48/2017. Pp. 3–6 , accessed August 17, 2020 (The article also covers cases of stings from Corythucha ciliata resulting in nettle rashes.).
literature
- E. Wachmann , A. Melber, J. Deckert: Bugs . Volume 1: Dipsocoromorpha, Nepomorpha, Gerromorpha, Leptopodomorpha, Cimicomorpha. (Part 1), revision of the bugs in Germany, Austria and German-speaking Switzerland, Goecke & Evers, Keltern 2006, pp. 118–119. ISBN 3-931374-49-1 .
- E. Security guard: Bugs - get to know, watch . Neumann-Neudamm, 1989, ISBN 3-7888-0554-4 .
