Ask a Question forum: Help, what are these spots on my speedwell?

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Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
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conniepr27
Jun 27, 2017 1:44 PM CST
I just noticed these spots on my speedwell. No bugs that I know of, but we've had a lot of rain.

Thumb of 2017-06-27/conniepr27/47e29f

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
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sooby
Jun 27, 2017 1:53 PM CST
Have you noticed anything similar on any other plants, especially in the mint family?
Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
Image
conniepr27
Jun 27, 2017 2:08 PM CST
Not similar, but I do have something showing up on my hostas.

Thumb of 2017-06-27/conniepr27/aae36a

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
Jun 27, 2017 2:15 PM CST
It wouldn't be the same thing, I was wondering about four-lined plant bug damage because they like speedwell. If you had any other plants like mint, Russian sage, catmint with similar symptoms I would suspect four-lined plant bugs. You wouldn't necessarily still find them if they've finished their generation for the year. It seems to be mostly on the older leaves which could suggest they've moved on. I'm just not 100% sure from the look of the spots, sometimes it's more obviously the culprit, so was hoping for another clue on a different plant that is susceptible Smiling
Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
Image
conniepr27
Jun 27, 2017 4:52 PM CST
I do have catmint and mint, but they are in the backyard and there is no sign of trouble on them. The catmint is brand new, as well.
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
Jun 27, 2017 6:14 PM CST
I suppose they might not have found them yet but maybe it's something else like a leaf spot. The new growth seems to be OK on your plant though. Here are some pictures of four-lined plant bug damage. The spots look slightly different on different plants - I have seen it on speedwell but don't have a plant here at home to compare. I will be going to a garden I know has speedwell and four-lined plant bugs later this week and will try and take a picture (if it's not raining - again).

https://www.google.ca/search?q...
Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
Image
conniepr27
Jun 27, 2017 8:46 PM CST
Thanks, Sue.
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
Jun 29, 2017 6:33 AM CST
I managed to get a couple of pictures of the four-lined plant bug damage on speedwell. They look slightly different on different leaves, I'm not sure if it depends on the age of the leaf or how much time has elapsed since the damage was done, but all is four-lined plant bug damage. Sorry the second one is a bit blurry, the light was poor and it was windy, more than my phone could handle.

Thumb of 2017-06-29/sooby/85d1d4
Thumb of 2017-06-29/sooby/4626b2

Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
Image
conniepr27
Jun 29, 2017 12:58 PM CST
It does look very similar, doesn't it.
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
Jun 29, 2017 1:05 PM CST
Yes, and at least here there are no bugs present now, they're done for the season but the damage remains. So I would keep an eye on your plant and if you see new spots check for the bugs. If you keep seeing new damage but no bugs then it may be something else. If you don't see new spots you may want to watch for the first signs next year and squish the bugs. They're tiny and red to start with before they grow and then turn into yellow-black striped adults.
Name: Connie
Edmonton, Alberta area (Canada (Zone 3a)
Cat Lover Butterflies Foliage Fan Enjoys or suffers cold winters Daylilies Plays in the sandbox
Dragonflies Ferns Region: Canadian Peonies Bookworm Clematis
Image
conniepr27
Jun 29, 2017 1:11 PM CST
Thanks, Sue. I'll keep an eye out.

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