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What is the yellow lowery substance on vines of clematis. Is it a form of aphids



I meant.... Yellow powdery substance on clematis vines. Are they bugs?

23 Jun, 2011


Something that looks powdery is often a mildew - associated with the soil being too dry around the plants' rootball.
These are such thirsty plants that the base of the rootball will dry out very quickly - use the hosepipe on a slow trickle for 10 minutes each watering session, each week, (more if you're in a hot State) because a watering can won't be enough.

23 Jun, 2011


Could also be rust, that looks yellowish orange and powdery - otherwise, just pollen dust?

23 Jun, 2011

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