Pests and Diseases forum: Seedling stem damaged at the soil level

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Apr 24, 2016 1:13 PM CST
Dear gardeners,

I need some help to identify a problem of a few seedlings that I have.
I am growing some black locust (robinia pseudoacacia) seedlings from seed. Currently they are about 3-4 weeks old. They are planted in a coconut choir that is enriched with fertilizer and vermiculite mixture (50:50). I water them daily very small amounts. I had 3 of them and then one of them fell over. After inspecting I found that the stem at the soil level was damaged. It looked as if it was chewed off. Here is the image of what I recovered:
Thumb of 2016-04-24/DeXodus/a59a9a
After inspecting the other two I found similar but smaller wounds on the stems. Here is the seeding with bigger wound:
Thumb of 2016-04-24/DeXodus/05ba83
Thumb of 2016-04-24/DeXodus/af973b
What could have caused this?

Apr 24, 2016 2:53 PM CST
One other note:
because all my windows face north I am supplementing natural light with one growlight (11W compact fluorescent lightbulb).
Name: Art
Florissant, MO (Zone 6b)
Hummingbirder Annuals Bee Lover Butterflies Garden Photography Seed Starter
Garden Ideas: Level 1
Apr 27, 2016 7:56 PM CST
Hi DeXodus and Welcome! to NGA

Well, the first thing I thought of was damping-off disease. However, after seeing your pictures, my guess would be a hungry mouse. Sad


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