Braune Käfer sind in Deutschland weit verbreitet. In Häusern und Wohnungen oder im Garten sind die Käfer nicht willkommen. Die Insekten können Lebensmittelvorräte kontaminieren, Möbel beschädigen und sogar Krankheiten übertragen. Im Gemüsegarten vernichten einige braune Käfer die Ernte. Senioren-Hobbygärtner erfahren hier alles Wissenswerte über die 5 häufigsten braunen Käfer in Deutschland.
Kurzfassung
Braune Käfer sind treffsicher zu unterscheiden anhand ihrer Größe, Körperform und spezifischen Merkmale, wie Streifen oder lange Fühler. Häufige braune Käfer in Deutschland sind Kornkäfer, Kartoffelkäfer, Fichtenrüssler, Hausbock und Stachelkäfer. Bis auf den Stachelkäfer sind diese Käfer allesamt Schädlinge.
Brauner Käfer im Vorratsschrank: Kornkäfer
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Kornkäfer (Sitophilus granarius) sind Vorratsschädlinge aus der Familie der Rüsselkäfer (Curculionidae). Auch im Senioren-Haushalt haben die Käfer keine Scheu, sich von Getreide, Nudeln, Keksen, Müsli und anderen trockenen Lebensmitteln zu ernähren. Das sollten Sie über Kornkäfer wissen:
Merkmale
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Größe: 3-5 mm
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Form: langgestreckt
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Farbe: braun, gemustert mit Längsstreifen und Punkten
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Erkennungstipp: langer Rüssel
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Lebensraum: Vorratsschränke, Küchenschränke
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Aktivität: nachtaktiv
Vorbeugung
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Lebensmittel kühl und in luftdichten Behältern aufbewahren.
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Vorratsschränke, Küchenschränke und Arbeitsflächen regelmäßig reinigen.
Maßnahmen
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Befallene Lebensmittel in der Restmülltonne entsorgen.
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Biologische Bekämpfung mit der Schlupfwespenart Lariophagus distinguendus.
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Ausführliche Informationen über den Kornkäfer können Sie bei Wikipedia nachlesen.
Braune Käfer im Haus: Hausbock
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Hausbockkäfer (Hylotrupes bajulus) aus der Familie der Bockkäfer (Cerambycidae) zählen zu den Holzschädlingen. Die wärmeliebenden Käfer legen ihre Eier in totem Holz ab, zumeist im Dachstuhl. Nach dem Schlupf ernähren sich die Larven vom Splintholz, was im ruhigen Wohnzimmer gut zu hören ist.
Merkmale
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Größe: 10-20 mm
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Form: länglich, abgeflacht
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Steckbrief-Pixabay-e1704977798162.png)
Farbe: braun bis schwarz-braun, grau behaart
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Steckbrief-Pixabay-e1704977798162.png)
Erkennungstipp: lange Fühler
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Steckbrief-Pixabay-e1704977798162.png)
Lebensraum: Häuser, Wohnungen
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Aktivität: tag- und nachtaktiv
Vorbeugung
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
Holz regelmäßig auf Befall untersuchen
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
Auf Fraßgeräusche im Holz achten
Bekämpfung ohne Gift
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
Befallenes Holz extremer Kälte (-18° C.) oder Hitze (+80° C.) aussetzen.
![](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
Große Möbelstücke für drei Wochen luftdicht einpacken.
![](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2024/01/Foto-Wissen-pixabay-e1706719998857.png)
![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Wissen-pixabay-e1706719998857.png)
Sehr ausführliche Informationen über den Hausbockkäfer können Sie bei beim Umweltbundesamt nachlesen.
Braune Käfer im Gemüsegarten: Kartoffelkäfer
![Ein Kartoffelkäfer sitzt auf den Blättern einer Kartoffelpflanze.](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2024/01/Foto-Kartoffelkaefer-Flickr-JVdOynatwx.jpg)
![Ein Kartoffelkäfer sitzt auf den Blättern einer Kartoffelpflanze.](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Kartoffelkaefer-Flickr-JVdOynatwx.jpg)
Kartoffelkäfer (Leptinotarsa decemlineata) gehören zur Familie der Blattkäfer (Chrysomelidae). Vor allem die gefräßigen Larven, sind gefürchtete Schädlinge an Kartoffelpflanzen und anderen Nacht-schattengewächsen. Wenn Sie im altersgerechten Garten Kartoffeln anbauen, sollten Sie mit folgenden Merkmalen des Kartoffelkäfers vertraut sein.
Merkmale
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Steckbrief-Pixabay-e1704977798162.png)
Größe: 8-12 mm
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Form: rund und dick gewölbt
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Farbe: hellbraun bis gelblich
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Erkennungstipp: dunkelbraune Streifen auf den Flügeldecken
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Lebensraum: Gärten, Felder
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Aktivität: tagaktiv
Vorbeugung
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Adulte Kartoffelkäfer an der Eiablage hindern.
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Hierzu die Beete im Frühjahr umgraben, Erde durch ein Durchwurfsieb werfen.
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Umgegrabene Beete mit engmaschigen Netzen überziehen.
Bekämpfung ohne Gift
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Befallene Pflanzen einsprühen mit einem Sud aus Brennnesseln, Minze, Farnkraut.
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![](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Check-Pixabay-4-e1705335398387.png)
Alternative: Pflanzen einstäuben mit Gesteinsmehl oder Mondamin.
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Bio-Schädlingsfrei-Neem mit Fraß- und Vermehrungsstoff anwenden.
![Grüner Daumen - Gartenblog von Gudrun Theissen](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2023/11/favicon.png)
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![Grüner Daumen - Gartenblog von Gudrun Theissen](https://gruener-daumen.b-cdn.net/wp-content/uploads/2023/11/favicon.png)
Grüner-Daumen-Buchtipp: Damit Sie mit Ihren Enkelkindern gemeinsam das Reich der Insekten erkunden können, gibt es das Taschenbuch „Was krabbelt denn da?“ Auf 112 Seiten erklärt der Kindernaturführer anschaulich 85 wichtige Insekten mit Tipps zum Bestimmen und Erkennen. Erhältlich ist das Buch im Buchhandel und bei Amazon unter der ISBN 978-3440172421 zum Preis von 12,40 Euro.
Brauner Käfer an Nadelbäumen: Fichtenrüssler
![Ein Fichtenrüsselkäfer in Großaufnahme.](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2024/01/Foto-Fichtenruessler-DtAtwHcru9.jpg)
![Ein Fichtenrüsselkäfer in Großaufnahme.](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-Fichtenruessler-DtAtwHcru9.jpg)
Fichtenrüssler oder Fichtenrüsselkäfer (Hylobius abietis) sind Holzschädlinge mit einer Vorliebe für Nadelbäume. Die eigentlichen Schäden an befallenen Bäumen verursachen die Larven. Wenn Sie als Senioren-Hobbygärtner in Ihrem Garten Nadelbäume kultivieren, dürften folgende Aspekte wissenswert sein:
Merkmale
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Größe: 10-14 mm
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Form: oval
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Farbe: dunkelbraun
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Erkennungstipp: gelbe Schuppen, Querstreifen, Flecken auf den Flügeldecken
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Lebensraum: Nadelwälder
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Aktivität: tagaktiv
Bekämpfung ohne Gift
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Tücher unter befallene Bäume legen, Gehölze schütteln, Käfer fallen herunter.
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Larven bekämpfen mit SC-Nematoden (mikroskopisch kleine Fadenwürmer der Art Steinernema carpocapsae).
Brauner Käfer auf Blüten: Stachelkäfer
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Stachelkäfer oder Breitköpfige Stachelkäfer (Tomoxia bucephala) aus der gleichnamigen Familie, zählen zu den wenigen harmlosen braunen Käfern in Deutschland. Im seniorenfreundlichen Garten halten sich die Käfer mit Vorliebe auf Blütenpflanzen auf, denn Pollen sind ihre Leibspeise. Gut zu wissen: Stachelkäfer stechen weder Sie, noch Ihre Enkelkinder oder Haustiere.
Merkmale
Größe: 5-8 mm
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Form: schmal-gekrümmt
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Farbe: graubraun
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Erkennungstipp: Stachel am Hinterleib
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Lebensraum: Gärten, Felder
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Aktivität: tagaktiv
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Grüner-Daumen-Tipp: Wenn im Haus ein brauner Käfer zum Himmel stinkt, haben Sie eine Marmorierte Baumwanze (Halyomorpha halys) vor sich. Die eingeschleppte asiatische Wanze ist 15 mm klein, hat einen braun-grau marmorierten Rücken und schwarz-weiße Seitenränder. Lange, geringelte Fühler sind ihr Markenzeichen. Greifen Sie jetzt nicht zu Fliegenklatsche oder Staubsauger, sonst setzt die Marmorierte Baumwanze ihre übelriechende Abwehrwaffe ein.
![Eine marmorierte Baumwanze auf einem Pflanzenblatt in Großaufnahme.](https://cdn.shortpixel.ai/client/ex_0,q_lqip,ret_wait/https://www.gruener-daumen.at/wp-content/uploads/2024/01/Foto-marmorierte-baumwanze-flickr-2jArcs9Q0A.jpg)
![Eine marmorierte Baumwanze auf einem Pflanzenblatt in Großaufnahme.](https://gruener-daumen.b-cdn.net/wp-content/uploads/2024/01/Foto-marmorierte-baumwanze-flickr-2jArcs9Q0A.jpg)
Fazit
Braune Käfer können im Haus Lebensmittel verderben, Holzmöbel beschädigen und im Garten Nacht-schattengewächse oder Bäume befallen. Erfreulicherweise sind die Käfer an ihren jeweiligen Merkmalen gut zu erkennen. Dieser Umstand versetzt Sie in die Lage, rechtzeitig Maßnahmen für die Vorbeugung und ökologische Bekämpfung zu ergreifen.