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I had a terrible thrip problem this last season. Most of my gladiolus didn't produce flowers. This is my question: I live in zone 10 (San Diego, Ca) & normally just leave my glad corms in the ground. I've read on various sites that the corms can be treated before planting. Some suggest a Lysol bath, some being stored in a seven dust. Do thrips live in the corms after the plant has died back? Should I dig them up or leave them in the ground?
Any help on this is greatly appreciated .......Thanks, Joanie