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      Abete Nobilis – mini albero di Natale, 30–60 cm
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      Yellow Kiwi “Golden Kiwi” (Actinidia deliciosa), 2 plants, 50 cm tall
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      Apple tree “Elstar” – in a pot, 90 cm tall
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      Hibiscus syriacus 'Tricolour' – albero standard per patio e giardino, vaso da 19 cm, altezza 90 cm
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      Outsider Box - Surprise Box - Mix of unique plants - 8-12 plants per set
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      Surprise Box – Mix of Houseplants – 5-10 plants per set
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      Predatory mite mix against thrips & spider mites – loose product
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Dizionario dei parassiti – Guardia Verde

Scolitidi: come riconoscere gli escrementi e i fori di ingresso: cosa puoi fare nel tuo giardino

scolitidi Si tratta di piccoli coleotteri che si sviluppano sotto la corteccia degli alberi. Gli alberi sono spesso particolarmente colpiti. conifere (ad esempio, abeti rossi), ma a seconda della specie, anche altre specie arboree. I tipici segnali di allarme sono: polvere di foro, piccolo Praticare dei fori e diminuzione della vitalità (ad esempio, aghi scoloriti, zone della chioma morenti). Importante: con gli scolitidi, il fattore più importante è... diagnosi precoce e azioni coerenti: ecco i consigli più importanti.

ⓘScolytinae · Coleotteri della corteccia (varie specie) #Polvere di trapano · Fori di ingresso · Corteccia

Cosa sono gli scolitidi?

Con il termine "scolitide" si intendono diverse specie del gruppo degli scolitidi (ScolytinaePerforano la corteccia e creano le loro gallerie nello strato floematico/corteccia. Lì si sviluppano le larve, che possono danneggiare il sistema vascolare dell'albero. Gli alberi particolarmente sensibili sono... indebolito Alberi, ad esempio a causa di stress da siccità, calore o danni preesistenti.

parassita della corteccia sotto la corteccia La diagnosi precoce è importante
Importante: Se si sospetta un'infestazione da scolitidi su alberi più grandi (o vicino ad altri alberi vulnerabili), è spesso necessario valutazione professionale sensato, anche per motivi di sicurezza stradale e di possibili normative.

Come riconoscere un'infestazione

  • Farina di perforazione (segatura fine) nelle scaglie della corteccia, nelle crepe o alla base del tronco
  • piccolo, rotondo Praticare dei fori nella corteccia
  • Flusso di resina/goccioline di resina (in alcune specie di alberi) come reazione di difesa
  • Segni di picchio (corteccia che si stacca, aree martellate)
  • Aghi/foglie scolorite, parti della corona diventano opache, giallastre o brunastre.
Suggerimento della Guardia Verde: La segatura è spesso uno dei primi segnali. Controllate la base del tronco, le fessure della corteccia e le aree sotto i rami, soprattutto dopo periodi caldi e secchi.

Quali alberi sono frequentemente colpiti?

  • Conifere (ad esempio abete rosso, particolarmente suscettibile a seconda della regione)
  • anche altre conifere (dipendenti dalla regione/località)
  • A seconda della specie, anche alberi decidui (altre specie di scolitidi)

Perché si verifica l'infestazione?

  • Stress da siccità e il calore indeboliscono il sistema immunitario
  • Danni da tempesta, rottura della neve, lesioni della corteccia
  • elevata densità di coleotteri nell'area circostante (ad esempio dopo un'infestazione nel quartiere)
  • posizione inadatta (troppo secca/troppo densa/troppo poca ventilazione)

Cosa fare in caso di infestazione? (ragionevole e realistico in giardino)

1. Valutare il grado di infestazione

  • singoli fori di perforazione vs. polvere di perforazione estesa e sintomi di corona chiara
  • Controllare se sono interessati più alberi.

2. Maneggiare il legno infestato in modo coerente.

  • Rimuovere i rami fortemente infestati/morenti (se tecnicamente possibile)
  • Non conservare il materiale infestato per lunghi periodi (altrimenti diventerà un terreno fertile).
  • A seconda delle prassi locali, il legno deve essere rimosso/smaltito tempestivamente oppure immagazzinato/coperto da personale specializzato.

3. Rafforzare l'albero (solo se è ancora vitale)

  • Durante i periodi di siccità, annaffiare abbondantemente e secondo necessità.
  • Cura del terreno: pacciamare moderatamente, evitare la compattazione
  • Evitare di danneggiare gli alberi (proteggere la corteccia)
Un avviso: In caso di grave infestazione (molti escrementi, notevole decolorazione della chioma, corteccia che si sfalda), l'albero è spesso già gravemente danneggiato. In tal caso, di solito, il passo successivo è... Controllo dei danni in primo piano.

Insetti utili contro gli scolitidi?

Nell'ecosistema naturale ci sono degli antagonisti (ad esempio PicchiInsetti predatori che possono influenzare le popolazioni di scolitidi. Nella pratica, tuttavia, questi di solito non si trovano nei giardini domestici e negli orti. nessuno Utilizzo "semplice" di insetti utili, come falene o afidi. L'approccio più efficace è quindi quasi sempre: rilevare precocemente, Evitare materiale riproduttivo E Vitalità degli alberi supporto.

Cosa aiuta invece: La riduzione maggiore del rischio di infestazioni successive si ottiene mantenendo stabile l'albero tramite l'approvvigionamento idrico e la manutenzione del sito, e impedendo al legno infestato di diventare un terreno fertile.

FAQ sugli scolitidi

La polvere di perforazione è sempre un indicatore affidabile?

La segatura è un segnale d'allarme molto tipico, ma può variare a seconda della specie arborea e dell'entità del danno. In combinazione con perforazioni e perdita di vitalità, il sospetto è significativamente più forte.

Un albero può riprendersi dagli scolitidi?

Se l'infestazione inizia molto presto e l'albero è sano, può compensare parzialmente il danno. In caso di infestazione grave, questo è spesso difficile: in tal caso, è fondamentale intervenire rapidamente.

Dovrei chiamare un'azienda specializzata?

Che si tratti di alberi di grandi dimensioni, di più alberi colpiti, di sicurezza stradale o di sintomi poco chiari, la risposta è sì. Una valutazione professionale spesso fa risparmiare tempo e previene ulteriori danni.

Come posso evitarlo?

Evitare lo stress da siccità (innaffiare se necessario), non danneggiare gli alberi, non conservare la legna rotta o danneggiata dalla tempesta per lunghi periodi e controllare regolarmente le scorte, soprattutto durante i periodi caldi e secchi.

Panoramica rapida

  • Parassita: Scolitidi (varie specie)
  • Zona: Alberi, in particolare conifere
  • Segnali: Polvere da trapano, fori di ingresso, scolorimento della corona
  • Chiave: Rilevazione precoce + evitare materiale riproduttivo
  • Insetti utili: Difficilmente utilizzabile in giardino
✓ Controllare la presenza di polvere di perforazione

Segni tipici

  • segatura fine
  • piccoli fori rotondi
  • Gocce di resina (a seconda dell'albero)
  • aghi/foglie scolorite

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