This is a container grown plant with cucumbers actively growing, and is located in Southern California. Can you recommend an insecticide or organic method?
Sevin dust will not affect leaf miners in the bit….You simply pull the leaves as you see them the best you can..The insecticides to use to control them are for control of the adult ..not the larvae in the leafs ..I have studied over thjis for years..there is a chemicals like isotex that help, but you use it on NOTHING that you are going to eat…Leaf minors you have to catch the adultas before they lay thier eggs in the leafs..check out this link..They will laugh at sevin dust..
http://www.eastbaynursery.com/diframe.html