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Re: wasps vs scale

>An orange tree and some potted abutilons in my greenhouse were covered
>with scales on both sides of the leaves and along the stems.
>I stuck them outside, hoping that maybe the rain or some birds might clean
>them off.  To my surprise, about three different kinds of wasp have been
>working on the plants every day.  They are very thorough, searching every
>part of the plants from the ground up, and removing the scales. The orange
>tree, which I put out first, is almost completely clean. I wish they would
>go inside the greenhouse, too.
>
>	Diane Whitehead  Victoria, B.C., Canada   zone 8  cool

Do you know the names of these wasps and if they are commercially available?
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