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Q.What Is This Larvae On My Delphinium Leaves?

Zone K0H 1H0 | Cathy Vakil added on July 25, 2020 | Answered

Over the past few weeks I have noticed my delphinium leaves (I have 5 plants) turning brown and black, curling and falling off, as well as some of the flower buds. I have removed the dead and sick leaves and buds and flowers (which have finished for now anyway). There is new growth at the base of each plant that looks healthy. I had a good look today and found these brown larvae underneath one of the leaves (see photos). What is it? What can I do? Should I cut back each plant – how far down?

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Certified GKH Gardening Expert
Answered on July 27, 2020

I am unable to identify that type of larva. I have never seen those, here, in my area. I would try a general purpose pesticide. Most organic methods are broad spectrum and will treat a large number of insect pests.

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