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      Predatory mite mix against thrips & spider mites – loose product
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Schädlingslexikon – Green Guardia

Asseln: Kleine graue Krabbler bei Feuchtigkeit erkennen & nachhaltig reduzieren

Asseln sind keine Insekten, sondern kleine Krebstiere, die vor allem Feuchtigkeit lieben. Im Garten sind sie nützlich, weil sie abgestorbenes Material zersetzen. Im Haus treten sie meist dann auf, wenn es dauerhaft feucht ist – zum Beispiel im Keller, Bad oder an undichten Stellen. Hier erfährst du, wie du Asseln sicher erkennst und die Ursache dauerhaft behebst.

ⓘIsopoda · Asseln #Asseln im Keller · Feuchtigkeit im Haus

Was sind Asseln?

Asseln gehören zu den Landkrebsen (Isopoda). Sie brauchen Feuchtigkeit, weil sie über eine Art „Kiemen“ atmen und deshalb nicht gut austrocknen dürfen. Im Garten sind sie wichtige Zersetzer. In Wohnräumen sind sie meistens ein Hinweis darauf, dass irgendwo zu viel Feuchte oder ein feuchter Rückzugsort vorhanden ist.

Feuchtigkeitsliebend meist harmlos Hinweis auf Feuchte
Wichtig: Asseln sind selten das „eigentliche Problem“. Nachhaltig wirst du sie los, wenn du die Feuchtigkeitsursache findest und reduzierst.

So erkennst du Asseln

  • kleine, graue bis bräunliche Tiere mit deutlich gegliedertem Panzer
  • laufen eher langsam und verstecken sich tagsüber
  • häufig unter Blumentöpfen, Matten, Kartons, im Keller oder Bad
  • bei Störung rollen sich manche Arten zu einer Kugel zusammen (Kugelasseln)
Green Guardia Tipp: Wenn du Asseln im Haus findest, prüfe direkt: Kondenswasser, undichte Fugen, Abflüsse, feuchte Kartons oder Stellen hinter Möbeln an Außenwänden.

Wo treten Asseln typischerweise auf?

  • Keller (Böden, Wände, Lagerbereiche)
  • Bad (Fugen, hinter Möbeln, bei schlechter Lüftung)
  • Küche (unter Spüle, an undichten Anschlüssen)
  • Terrasse/Balkon (Türschwellen, feuchte Matten)

Warum kommt es zum Auftreten?

  • dauerhaft hohe Luftfeuchte oder feuchte Oberflächen
  • undichte Stellen (Wasserleitungen, Abflüsse, Silikonfugen)
  • feuchte Lagerung (Kartons, Textilien, Holz)
  • direkter Zugang von außen (Türspalten, Kellerfenster, Lichtschächte)

Was tun bei Asseln im Haus? (natürlich & sinnvoll)

1. Feuchtigkeit reduzieren

  • regelmäßig stoßlüften (besonders Keller/Bäder)
  • bei Bedarf Luftentfeuchter nutzen
  • Kondenswasser vermeiden (Möbelabstand zu Außenwänden)

2. Rückzugsorte entfernen

  • feuchte Kartons/Matten entsorgen oder trocken lagern
  • unter Töpfen/Regalen sauber und trocken halten

3. Eintrittsstellen prüfen

  • Spalten abdichten (Türschwellen, Kellerfenster, Lichtschacht)
  • Fugen und Anschlüsse kontrollieren

Asseln im Garten – oft nützlich

Im Garten sind Asseln meist Helfer: Sie zersetzen abgestorbenes Pflanzenmaterial und verbessern den Boden. Problematisch werden sie selten – meist nur bei sehr hoher Dichte und an zarten Keimlingen. Im Haus ist ihre Anwesenheit dagegen fast immer ein Feuchte-Signal.

Warum die Ursache zählt: Wenn du die Feuchtigkeit im Griff hast, verschwinden Asseln meist von selbst, weil sie ohne feuchtes Mikroklima nicht dauerhaft überleben.

FAQ zu Asseln

Sind Asseln gefährlich?

Nein. Asseln sind für Menschen harmlos. Sie können aber auf Feuchteprobleme hinweisen, die langfristig Schimmel begünstigen können.

Warum habe ich Asseln plötzlich in der Wohnung?

Häufig wegen Feuchtigkeit, undichten Stellen oder weil sie von draußen durch Spalten hereinkommen – z. B. bei Regenperioden oder feuchten Kellern.

Hilft einfach nur Putzen?

Putzen reduziert die sichtbaren Tiere, aber ohne Feuchte-Management kommen sie oft wieder. Nachhaltig ist es, feuchte Rückzugsorte zu entfernen.

Wie kann ich vorbeugen?

Trockenes Raumklima, saubere Lagerflächen, keine feuchten Kartons/Matten und das Abdichten von Spalten.

Schnellüberblick

  • „Schädling“: Asseln (meist harmlos)
  • Bereich: Keller, Bad, feuchte Stellen
  • Anzeichen: graue Panzer-Tierchen, Verstecke
  • Schlüssel: Feuchtigkeit reduzieren
✓ Feuchte = Ursache

Typische Hinweise

  • häufig bei Nässe
  • verstecken sich tagsüber
  • auftreten in Kellern
  • Hinweis auf feuchte Bereiche

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