---
title: Sooty mould in a terrarium | Glass Jar Garden
description: Sooty mould: Black film on leaves where sap-sucking insects have been.
url: https://glassjar.garden/guide/moulds/sooty-mould/
---

Moulds and films

# Sooty mould

Black film on leaves where sap-sucking insects have been.

## Care

- Air humidity: 70 to 100%

- Temperature: 15 to 32 °C

## Description
This black, powdery coating grows on the sticky honeydew left by aphids, scale, mealybugs and whiteflies. It shades leaves rather than infecting them. Washing leaves helps for a while, but it keeps coming back until the pests are gone.

Also called sooty mold, black mould on leaves.

Estimated, where sources were thin: spread_cm_per_day; temp_c; humidity_rh_pct; duration depends on pest, not modelled.

## Sources

- [en.wikipedia.org/wiki/Sooty_mold](https://en.wikipedia.org/wiki/Sooty_mold)
- [ipm.ucanr.edu/PMG/PESTNOTES/pn74108.html](https://ipm.ucanr.edu/PMG/PESTNOTES/pn74108.html)

[Grow it in a jar](https://glassjar.garden/?guide=moulds/sooty-mould)

[Slime mould](https://glassjar.garden/guide/moulds/slime-mould/) · [White fuzzy mycelium (new-wood bloom)](https://glassjar.garden/guide/moulds/white-saprophytic-mycelium/) · [All moulds and films](https://glassjar.garden/guide/moulds/)