Evening Republican, Volume 21, Number 305, Rensselaer, Jasper County, 31 December 1918 — Sodium, Fluorid Found to Be Most Effective Substance to Kilt the Bothersome Roaches [ARTICLE]

Sodium, Fluorid Found to Be Most Effective Substance to Kilt the Bothersome Roaches

Government ehtomologists, by study of the habits of roaches, have found that these Insects frequently cleanse their legs and antennae when any dirt or powder comes In contact with these These are at once drawn through mouth parts of the Insects and In this way cleaned. As a result, a certain amount of any powdered substance applied directly to a roach or through which It may crawl is taken into the moqth and presently, whether distasteful or not, finds its way Into the stomach. Therefore it is not necessary to mix a stomach poison in powdered form with an attractive bait, since the chances are much greater that the poison-will reach the stomach through Its habit of cleansing itself than through the eating of • poison bait. . Sodium fluorid, according to the United States department of agriculture, was found to be the most rapid . killer of roaches of all the substances tested. Pyrethrum powder, pure, killed practically all roaches VSthin 48 hours, but its effectiveness was, greatly reduced when slightly diluted. Borax was found to be very slow and was only partially effective in kitchen tests. Thirty-eight miscellaneous materials were found to be ineffective.

materials were found to be ineffective.