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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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      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

Dorifora della patata: identificazione, danni da alimentazione e azione naturale

La dorifora della patata (Leptinotarsa decemlineata) può danneggiare gravemente le piante di patata in breve tempo. Le larve, in particolare, causano ingenti danni alle foglie. Qui imparerai come identificare in modo affidabile la dorifora della patata, le sue uova e le sue larve, quali danni sono tipici e quali metodi naturali possono essere d'aiuto.

ⓘLeptinotarsa decemlineata #Larve della dorifora della patata · Danni alle foglie delle patate

Che cos'è la dorifora della patata?

La dorifora della patata è un sorprendente coleottero a strisce gialle e nere. Sverna nel terreno e riappare sulle piante di patate in primavera/inizio estate. Dopo la deposizione delle uova, si schiudono le larve, che causano i danni maggiori.

parassita della patata Le larve si nutrono molto sverna nel terreno

Come identificare gli scarabei della patata, le uova e le larve

  • Coleottero adulto: giallo con strisce longitudinali nere, tondeggiante-ovale
  • Uova: giallo-arancio brillante, in gruppi sulla pagina inferiore delle foglie
  • Larve: dal rossastro all'arancione, spesso, con macchie scure sui lati
Suggerimento della Guardia Verde: Prestate particolare attenzione alla pagina inferiore delle foglie. Individuare e rimuovere le uova in anticipo eviterà danni peggiori causati dalle larve.

Tipici modelli di danno

  • Segni di alimentazione irregolari sulle foglie
  • Defogliazione rapida (le foglie vengono notevolmente ridotte)
  • gruppi di larve visibili sulle singole piante
  • piante indebolite e ridotta formazione di tuberi

Quali piante sono colpite?

  • Patate (ospite principale)
  • altre piante di belladonna (ad esempio, melanzana)
  • Occasionalmente anche pomodori (a seconda della regione/pressione dell'infestazione)

Perché si verifica l'infestazione?

  • Svernamento nel terreno vicino alla zona di coltivazione
  • Una primavera calda accelera lo sviluppo
  • Controllo scarso: le uova/larve restano inosservate.
  • grandi raccolti di patate nella zona

Prevenzione naturale

1. Controllare regolarmente

  • Controllare la parte inferiore delle foglie ogni settimana, a partire dalla germogliazione.
  • Controllare più frequentemente, soprattutto nelle giornate calde.

2. Rotazione e posizione delle colture

  • Non coltivare le patate nello stesso posto ogni anno.
  • Se possibile, aumentare la distanza dalle aree dell'anno precedente.

3. Rafforzare le piante

  • apporto nutrizionale equilibrato
  • apporto idrico costante (non "stress" da secchezza)

Misure delicate per combattere l'infestazione

  • Rimuovere i grappoli di uova dalla parte inferiore delle foglie
  • Raccogliere coleotteri e larve (mattina/sera)
  • Rimuovere selettivamente le foglie fortemente infestate.

Insetti utili e nemici naturali

In un giardino naturale, diverse forze opposte contribuiscono a ridurre la pressione. Tra queste, soprattutto: uccelli, coleotteri terrestri e altri insetti predatori. Tuttavia, l'aspetto più pratico delle scolitidi della patata è che... controllo meccanico (Raccogliere le uova/larve) perché gli stadi sono chiaramente visibili.

Perché la raccolta manuale è così efficace: La dorifora della patata depone le uova in gruppi: se si rimuovono le covate in anticipo, si impedisce che molte larve si schiudano contemporaneamente.

Domande frequenti sulla dorifora della patata

Quando sono più comuni le scolitidi della patata?

Di solito dalla tarda primavera all'estate, a seconda del clima e della regione. Dopo periodi caldi, uova e larve possono svilupparsi particolarmente rapidamente.

Dove posso trovare le uova?

Quasi sempre sulla pagina inferiore della foglia, sotto forma di gruppi di uova di colore giallo-arancio.

Quanto velocemente una pianta può essere completamente spogliata?

In caso di grave infestazione larvale, la diffusione è molto rapida, pertanto è fondamentale un monitoraggio tempestivo.

Qual è il primo passo migliore in caso di infestazione?

Rimuovere le uova e raccogliere le larve. Continuare a controllare regolarmente per assicurarsi che non vengano tralasciate nuove covate.

Panoramica rapida

  • Parassita: Dorifora della patata
  • Zona: Orto (patate)
  • Schema dei danni: Danni alle foglie fino alla completa defogliazione
  • Messa a fuoco: Rimuovere le uova, raccogliere le larve
✓ Rilevazione precoce = meno danni

Segni tipici

  • Ovaie sulla pagina inferiore delle foglie
  • larve rossastre con macchie
  • alimentazione in rapido aumento
  • diverse larve su una pianta

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