Something ruining my beet leaves

Asked May 31, 2018, 9:42 AM EDT

I have noticed some burning on my beet leaves, there is also what looks like exit holes from the burn areas so i was wondering if i may have leaf miners. It isn't clearly trails where an insect has been, it is just a large section where the leaf has been eaten from the inside. Maybe some plant disease is getting in? There is a small patch of tiny white things often under this burn spot. I've been removing the affected leaves, but I do not see any grubs in there when holding up to the light. Do you have any helpful information about what I can do to combat this before it takes my whole beet patch? Do you think it may be something else? Thanks! Sara

Multnomah County Oregon

1 Response

Leaf miners are the most likely culprit. Here are some photos, you'll find more with an image search online: http://extension.oregonstate.edu/deschutes/spinach-leafminer
This page from the PNW Handbook by the Extension Service explains the life-cycle and offers some controls for homeowners. https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/beet-table-leafminer