Q.These Flies Are Killing My Lilacs
Can anyone tell me what these pests are and how to get rid of them

BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on June 17, 2020
This looks like the adult form of one of many species of Leafminer. Here is an article that will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/leaf-miner-control.htm
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Rolfdt
Answered on June 21, 2020
Thank you!
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