ARSENATE OF LEAD SPRAYING
Commenting on a letter from “Housewife" about spraying of vegetables with arsenate of lead, Mr W. J. Humm, contributor of gardening notes for “The Press," says; “This preparation is poison and is marked so on the containers. Tor many years arsenate of lead has been sprayed on members of the cabbage family to control the attack of . grubs of the diamond-back moth and ..other chewing insects. It should never be sprayed on fruit or vegetables for, present use. Although many use this preparation, they do so when the cabbage plants are quite young, and by the time the cabbage comes to maturity all trace of the poison has gone. As cabbages mature, the outside leaves, fold over and form,the heart; it is then impossible for any of the preparation to be on the inside growth, as the heart leaves develop from the inside. If •vegetables were given a heavy coat of arsenate of lead spray just before use, and were not thoroughly washed, it is possible for them to produce the evil effect complained of.”
Mr Humm also mentions that there is a non-poisonous preparation which effectively controls grubs.
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Bibliographic details
Press, Volume LXXIII, Issue 22082, 3 May 1937, Page 4
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193ARSENATE OF LEAD SPRAYING Press, Volume LXXIII, Issue 22082, 3 May 1937, Page 4
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