If you lift up one of the brown 'shells' and there is what looks like cotton wool underneath then they are scale insects. I use a stiff brush to rid them from my acers on the rare occasions I have that problem.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Acers are known to be sensitive to horticultural soaps so I'd be wary of using neem oil without a definite answer. The birds ate all mine and I squashed a few too but non-chemical definitely seems the safer option on these trees.
If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation.
I can't see in the picture. For the usual plants we get aphids on,I start off using the 'squish" method,then blasting with the hose. Have never had any pests on the Acer's though. Have lost them to wind burn in the past.are you in the UK?
I can't see in the picture. For the usual plants we get aphids on,I start off using the 'squish" method,then blasting with the hose. Have never had any pests on the Acer's though. Have lost them to wind burn in the past.are you in the UK?
They look similar to the olive scale I get, on my olive trees funnily enough 😊 If they are scale, don’t think neem would work, they are well protected under their carapaces. Picking/brushing them off is probably your best bet. Not an issue at the moment, but I recently read that neem turns phytotoxic to plants at temps above 25c. I can’t use it anyway as it burns leaves even in my spring sun.
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
if it is scale, you can often remove by gently scrubbing with a nail brush or similar. If that fails, a cotton bud dipped in meths and applied carefully also works. Not something I've ever had on any plant I've grown, but other forum members have used those methods.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
I suggest you must be careful when spraying a plant with anything, especially oil. The sunlight hitting the oil will burn the acer leaves!! Spray on cloudy days only!
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I live in west central Scotland - not where that photo is...
I use a stiff brush to rid them from my acers on the rare occasions I have that problem.
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
I live in west central Scotland - not where that photo is...
Not something I've ever had on any plant I've grown, but other forum members have used those methods.
I live in west central Scotland - not where that photo is...
Spray on cloudy days only!