What's eating my tropical pitcher plant 'ventrata'?

Nepenthes 'Ventrata' is a robust tropical pitcher plant grown as a houseplant or in a warm greenhouse. Spider mites are the most common attacker in dry indoor air. Mealybugs and scale can hide in the leaf axils and inside pitchers. Fungus gnats breed in moist media. Strong airflow and humidity control are the best defenses.

Fine webbing on leaf undersides; stippled, bronzed leaves; pitchers may abort Raise humidity, mist regularly, and apply insecticidal soap or neem oil; repeat every 5–7 days for three cycles

White cottony clusters in leaf axils and along the tendril; sticky honeydew and sooty mold Dab with a rubbing-alcohol-soaked cotton swab; follow up with neem oil spray; isolate affected plants

Flat brown or white waxy bumps on stems; yellowing leaves and reduced pitcher production Scrape off with a soft brush; treat with neem oil or horticultural oil; repeat fortnightly