Iris - Knowledgebase Question

Roxbury, Ma
Question by lcoleman5360
October 2, 2009
What can I do to fight this Iris borer thing. Ive got the brown tipped leaves and very little blooms. Thank you.

Answer from NGA
October 2, 2009


Iris borers are a royal pain, but here are a few things you can do: Keeping a clean garden is the first step in minimizing borer problems. In the summer and fall, the borer moths lay their eggs on the iris foliage or on the foliage of nearby plants. In the fall, cut back the iris leaves and remove them from your garden. This will reduce the number of borers hatching next spring. In the spring, watch for the signs of borer infestation. A sharp eye for borer entry allows some gardeners to catch the borer in the leaf before it travels to the rhizome (simply pinch them in the leaves). If the borer has chewed its way further down the leaf, it maybe easier to remove a portion of the leaf than to search for and destroy the borer. Imidacloprid is a systemic, persistent pesticide manufactured by Bayer Corp. with low toxicity to mammals. Merit is the brand marketed for home use. To control borers, Merit only has to be applied once in the spring. As with all pesticides, read and carefully follow the directions.

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