POTASSIUM SULPHIDE

Evening Post, Volume CXV, Issue 109, 11 May 1933, Page 18

POTASSIUM SULPHIDE

VALUABLE GARDEN MEDICINE

Sulphide of potassium, or liver of sulphur, should be used in every garden, as it is one of the most valuable and adaptable of garden remedies, especially for mildew. Used at the rate of one ounce to 10 gallons of water it acts as a preventive of many fungoid diseases, and is perfectly harmless to foliage. If applied at_ twice or three times the above strength it is a powerful fungicide, but rather apt to injure delicate foliage under certain conditions. For use out of doors, the strength of tho application must be adjusted to the weather. For roses and similar plants 1 ounce in three gallons of water is tho maximum strength for cool, damp weather, while in hot, bright weather, and with a somewhat flagging plant one ounce in six or seven gallons lof water is the limit of safety. Enough 'soft soap to make a good lather should always be added as a spreader, and to make tho solution stick .to the plant. It should bo remembered that liver of sulphur will blacken whi^e lead paint, and for inside the greenhouse, zinc white should be used instead of lead paint, and thus the blackening may be avoided. The great objection to tho use of sulphide of potassium is its objectionable smell, but in the open air this goes off in an hour or so.