Pests and Diseases forum: Salvia involucrata "Rosebud Salvia" .....leaf problem

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Name: Cal McGaugh
Escondido, California (Zone 10b)
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EscondidoCal
Aug 19, 2017 7:29 PM CST
I bought this plant online (received 10 days ago).

The plant was wilted (soil was dry), but it re-hydrated
after soaking it for a few hours.

It appeared to be doing Ok since then, but now it looks like it
may have a disease or pest.
What could be causing the small pale green spots?
I don't see any visible insects. Confused
Thumb of 2017-08-20/EscondidoCal/35e015


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Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Aug 19, 2017 7:33 PM CST
If you shake the plant does anything hop/jump/fly out? Can you also check underneath the leaves for pests, better with a magnifying lens if you have one.
Name: Danita
GA (Zone 7b)
Charter ATP Member Forum moderator Hummingbirder Salvias Butterflies Birds
Plant Identifier Vegetable Grower Container Gardener Seed Starter Cat Lover Region: Georgia
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Danita
Aug 19, 2017 7:40 PM CST
It looks like a bad Spider Mite infestation. Try tapping the leaves over a piece of white paper to check. Also, check for webbing.
Name: Cal McGaugh
Escondido, California (Zone 10b)
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EscondidoCal
Aug 19, 2017 8:01 PM CST
sooby said:If you shake the plant does anything hop/jump/fly out? Can you also check underneath the leaves for pests, better with a magnifying lens if you have one.
Nothing hopping, etc......I'll check it out under a stereo microscope we have set up (for pond critters).

Danita said:It looks like a bad Spider Mite infestation. Try tapping the leaves over a piece of white paper to check. Also, check for webbing.

I think that's it, though no webbing.
As a short term fix, I cut off a good size cutting to root in water, and sprayeed it well with 70% isopropyl alcohol.
I sprayed the main plant with Palmolive Dish Detergent.......~1/2tsp in 12oz water.
Also, I gave it a tsp of Bayer All in One (granular).
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[Last edited by EscondidoCal - Aug 19, 2017 8:09 PM (+)]
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Name: Cal McGaugh
Escondido, California (Zone 10b)
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EscondidoCal
Aug 19, 2017 9:04 PM CST
Later....
just checked a leaf that I had treated with alcohol under the scope, and it's definitely spider mites....~10,
and several eggs.

Most were opaque dark colored and not moving (hopefully, dead)....but at least 2 (younger ones) were scrambling around....they were translucent, and smaller.

Aaaaagggghhh! .......Now I need a shower! =O
Learn & create something every day.

"Take only pictures. Leave only footprints."
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Aug 20, 2017 5:06 AM CST
Is that the Bayer All in One that contains imidacloprid as the insecticide? Imidacloprid has been shown to increase problems with spider mites (which are not insects) in other plants.

I'm surprised that 70% isopropyl alcohol didn't damage the plant.
Name: Cal McGaugh
Escondido, California (Zone 10b)
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EscondidoCal
Aug 20, 2017 6:09 PM CST
sooby said:Is that the Bayer All in One that contains imidacloprid as the insecticide? Imidacloprid has been shown to increase problems with spider mites (which are not insects) in other plants.

I'm surprised that 70% isopropyl alcohol didn't damage the plant.

re: All In One.....does contain Imidacloprid.....I didn't know about it increasing the problem, but found several links to
it using Google.

Thanks for the heads up.....would never have suspected it.

No damage due to alcohol that I can see.....it evaporates fairly quickly....not a permanent fix.

I bought some Neem Oil at Home Depot today, gave the cuttings & the plant
a good dose. Hope that will turn the tide. Crossing Fingers!

Also welcome any info on what you've found to work best.
:thankyou:



Learn & create something every day.

"Take only pictures. Leave only footprints."
Name: Cal McGaugh
Escondido, California (Zone 10b)
Image
EscondidoCal
Nov 16, 2017 3:08 AM CST
The Rosebud finally gave up in spite of Neem, spraying with water, and cutting off infected leaves. Sad

Since then, I found spider mites on other plants in our garden, and am using Bayer 3 in 1 for Mite Control.....no imidacloprid!

I'll see about getting a replacement for the Rosebud, and try again.
Learn & create something every day.

"Take only pictures. Leave only footprints."

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