In making a study of how the lime-sulphur wash kills scale-insects, it was found that after treatment with the spray, for several hours before death results, many of the insects lie under their scale coverings in a more or less comatose condition. During this time, if the scale is removed, the insect speedily recovers the ability to respond when touched with a needle. Of course after a few hours in dry air the delicate bodied insect would shrivel and die, but fresh air seemed to be the thing that revived it when the covering was first removed.
Document Type: Research Article
Publication date: February 1, 1911
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