La tingide dell’azalea (Stephanitis pyrioides) è un insetto fitofago appartenente all’ordine dei Rincoti Eterotteri. Vive quasi esclusivamente sulla pagina inferiore delle foglie, dove si nutre pungendo i tessuti e succhiando la linfa cellulare. È proprio questa alimentazione a causare la tipica decolorazione chiara e marmorizzata visibile sulla pagina superiore: non una carenza, ma una perdita localizzata di clorofilla dovuta alla distruzione delle cellule fotosintetiche. L’insetto sverna come
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