Marianne's Response

Moth infestation of gooseberry bush

We have a gooseberry bush which is laden with berries. I have picked 3 quarts already and there are probably at least 4 more to go. Two days ago I noticed some of the leaves on the ends of this year’s shoots had been nibbled completely away. This morning more have been affected. I have found one little ball of what looks like a bit of white cotton fluff inside one leaf. Inside several others, which are curled, there seem to be small brown cylinders which look as if they could have held eggs. I found two very pale green caterpillars – a quarter of an inch long, and 4 bigger grey-green ones with black stripes.

A similar thing happened last year. Immediately after the fruit finished the leaves were completely eaten away – very rapidly until one morning the bush was almost completely denuded. We thought the bush was dead and were amazed when it grew strongly again this spring. I have sprayed with soap water, but what else can I do and wha

Posted by Sheila Means on July 18, 2014

Marianne's Response

It sounds like you may have an infestation of a moth (perhaps the Gypsy Moth caterpillar). It may be too late to save the foliage this year, but the time to take action for next year is in the spring. Spray the plants with Bacillus thuringiensis (BT) in early spring every 10 to 14 days. Then in June use burlap sacks wrapped around the base of the plant to catch any larvae that try to crawl up the trunk into the foliage. Meanwhile you should continue to spray the plants with soapy water and let Mother Nature decide if the gooseberries are worth the work to grow. Caterpillars can appear in waves for several years and then decline as predators build up. Keep growing, Marianne Binetti