Nepenthes ventricosa Leaf Spots: Cold Damage or Pests?

Nepenthes leaf spots

N. ventricosa with spots on a few leaves, all old pitchers dead, one new pitcher growing. Misted with filtered water, under grow light, Washington state.

Likely: Cold Exposure

Spotting pattern suggests a past cold shock. If limited to older leaves and new growth is clean, the plant will grow out of it with stable conditions.

Check for Thrips

Use a magnifier on leaf undersides. Tiny, elongated insects = thrips. Treat with spinosad or systemic if found.

Stop Misting

Misting inhibits pitchering in Nepenthes and provides negligible humidity benefit. Water at the soil level only.

Reference: Nepenthes Care Guide