Mottling of leaves of perenial lobelia as if a very bad infestation of spider-mite

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CrowCtg Maidstone, United Kingdom Apr 28, 2019

As I said in the topic, I have very mottled leaves on Lobelia Fan Scarlet as if I have a very bad infestation of spider-mite, but under a 10 x's magnifier I see nothing...
In close proximity to it I have blue perennial lobelia's with no problem on their leaves at all..

Any idea's ?

AFR

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CrowCtg Maidstone, United Kingdom Jun 27, 2019

I realised the answer to this myself some time ago, I should have said.

I used the red spider mite predator last year, it didn't get control on the infestation on the lobelia, but the predator did survive the winter.

So, the overwintering leaves were heavily mottled, but new leaves this year are not

This message was edited Jun 27, 2019 1:42 PM

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Kell San Leandro, CA(Zone 9b) Jun 27, 2019

Mites are so annoying! Did you buy Phytoseiulus persimilis to eat them? Definitely better than pesticides if they work.

Lobelia Fan Scarlet is so stunning!

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Zen_Man Ottawa, KS(Zone 5b) Jun 27, 2019

Hi CrowCtg,

You would see the mites in high detail with a 10X magnifier. Spider mites can be seen readily with the naked eye, as tiny moving dots on the strands of their webs.

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CrowCtg Maidstone, United Kingdom Jun 28, 2019

Kell.. I used Amblyseius Andersoni .. "Amblyseius andersoni is a low/high temperture predator, which only needs a temperature of 10c to become active and is much more tolerant of higher temperatures i.e. above 30c"
And it can overwinter .. > https://www.bugsforgrowers.com/products/predatory-mite-amblyseius-andersoni <

Zen_Man ... I do see them with a 10x lens, but not with naked eye, my eye's are not what they were.

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