Hi Jean! This appears to be damage from a cucurbit leafminer. There is not much you can do once you see the damage. It is recommended to keep your garden clean and weeded and potentially consider a physical barrier for your garden. Pesticides won't prevent larvae from feeding once they are hatched so it is not suggested to spray as some pesticides can harm natural/native predators to the leafminer. I hope this helps! Thank you for posting!
https://extension.umn.edu/yard-and-ga...
http://ipm.ucanr.edu/PMG/r116300911.html
Annalyse
Posted
by: Annalyse Kehs
(2 points)
Posted: April 10, 2019
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