Time to act:
Jun, Jul, Aug, Mar, Apr, May, Dec, Jan, Feb, Sep, Oct, Nov
These tiny, sap-sucking pests may be only 0.5mm long but they can wreak havoc in a greenhouse or on houseplants indoors. For most of the year they are a pale green colour with two dark spots on their back; it's only in autumn and winter that they turn orange-red. They thrive in hot, dry conditions so life in the greenhouse, or a centrally-heated home, suits them just fine. If the temperature stays above 12 celsius, they can breed all year round.
Leaves and stems of plants covered in fine webbing. The upper surface of the leaf is mottled, while mites and eggs can be seen with a magnifying glass on the undersides of leaves. The plant may die.
Find it on
houseplants, greenhouse plants, also outdoors on fuchsias, runner beans, busy lizzies, grape vines