Up to the present time, borax is considered the most practical chemical in the treatment of manure for the control of house fly larvae. In a large series of insecticide tests, borax was found inferior to sodium fluosilicate in destroying fly maggots in manure. Neither material was found to possess ovicidal properties. Both borax and sodium fluosilicate act as stomach poisons, producing mortality when treated manure is actually eaten. Sodium fluosilicate, however, has the advantage of being much more toxic to either larvae or adults. In addition, sodium fluosilicate in amounts up to 300 pounds per acre has no detrimental effect on plant growth, while borax, in very small amounts may prove harmful to certain sensitive plants such as citrus. Since small maggots are more easily poisoned by chemical treatment than are large larvae, best results will be obtained by sprinkling the manure with a saturated solution (1-154) of sodium fluosilicate each day.
Document Type: Research Article
Publication date: April 1, 1931
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