Plant Doctor Archive

Katydids on roses

I have a problem with katydids eating my roses. Can you please help?

Katydids are difficult to catch because they are green and they blend in well. They fly at night and their plant of choice is citrus and roses — buds, flowers and leaves. Often they don't cause significant damage. Katydids are common from March to June.

It is now pruning time for most roses, so by removing the foliage you are removing their food source. They shelter in long grass, so remove any nearby long grass where they can hide. If a chemical control is required, use a systemic insecticide spray such as Orthene.

More on Katydids

Advice by Dr Dan Blanchon from Unitec's Diploma in Sustainable Horticulture and Bachelor of Resource Management.

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