Tomato yellow leaves

Asked June 8, 2020, 8:42 AM EDT

What is causing some yellow leaves on these tomatoes? 5-10-10 was used when planting and when yellowing started soluble acid fertilizer was used once. Plant has been dusted with sevin/copper dust and later sprayed with pyrethrin/piperonyl butoxide spray. Nearby parking area was sprayed with Roundup EC but I don't think it drifted. Thank you.

Dorchester County Maryland

1 Response

Hi- we can see what appears to be minor feeding injury, probably flea beetles. The color breaking on new foliage does indicate possible glyphosate injury:
https://content.ces.ncsu.edu/glyphosate
https://www.clemson.edu/public/regulatory/plant-problem/fact-sheets/herbicide-damage.html

Hopefully, it was a small amount of drift and they will grow out of it.
Jon