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The Pamphlet Collection of Sir Robert Stout: Volume 14
Remedies
Remedies.
Kaltenbach, the German entomologist, says that washing with water containing solutions of sulphur and tobacco may be advantageously employed. This was tried in 1868 in England
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without much benefit. The only effectual remedy would appear to be washing the plants by means of hand or horse engines, with a composition of water, soft soap, and quassia, in the following proportions:—
without much benefit. The only effectual remedy would appear to be washing the plants by means of hand or horse engines, with a composition of water, soft soap, and quassia, in the following proportions:—
- 100 gallons of water,
- 4 to 6 lbs. of soft soap,
- 4 to 6 lbs. of quassia (extract after well boiling).
Water alone would be effectual, only it runs off the web-covered leaves. The soap fixes it on them, and the bitter of the quassia makes them unpleasant to the tastes of the red spiders.