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nafex - Re: [NAFEX] currant sawfly on gooseberries

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  • From: Lon Rombough <lonrom@hevanet.com>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] currant sawfly on gooseberries
  • Date: Thu, 23 Sep 2004 09:40:24 -0700

Since they pupate in the soil, one thing I'd try would be killer nematodes. They attack all sorts of soil dwelling pests and did a good job on strawberry root weevils I had trouble with one time. If they work on the sawfly pupae, it would be a long-term cure.
-Lon Rombough
Grapes, writing, consulting, my book, The Grape Grower, at http://www.bunchgrapes.com Winner of the Garden Writers Association "Best Talent in Writing" award for 2003.
On Sep 23, 2004, at 9:22 AM, derry&bill wrote:

Hélène,

It's not really a caterpillar, but a caterpillar-like pest. It is the larval form
of a sawfly. It looks like a caterpillar and it is green, smooth with black spots
and a black head. Hymenoptera Family. A British reference calls it Nematus
ribesii.

The sawfly lays eggs along the underside of the veins of the currant bush.
Depending on the weather, in south coastal B.C., the egg hatches at the end of
April. There may be a second generation in June. They pupate in the soil beneath
the currant bush. The sawfly emerges and flies up into the currant bush to lay
eggs.





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