Japanese Maple Trees
Q.

Acer palmatum disease

Anonymous added on July 7, 2015 | Answered

I have returned from holiday to find my 10 yr old acer 'Garnet' covered in a white sticky mess, a bit like minute cotton wool balls, all over. What do I need to do and will it survive? Please help.

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on July 7, 2015

It sounds like you have either mealybugs or possibly scales, which are closely related to mealybugs and are an occasional problem on maples. One of the most common is cottony maple scale. The insect forms a cottony mass on the lower sides of branches. Scales are usually controlled with horticultural oil sprays. Neem oil is also effective. Here is more iinformation: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
https://www.gardeningknowhow.com/plant-problems/pests/mealybugs-white-residue-on-plants-leaves.htm
https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm

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