New dust replaces Arsenic.Search for a non-poisonous insecticide that might be substituted for arsenic and that,at the same ttime.would give effective control of insect pests of vegetables has been rewarded by the discovery of derris,a tropical plant from which a dust possessing marked insecticidel properties can be produced.Entomologists at the State Experiment Station at Geneva, -New York,have tried out this new material against worms on cauliflower and against the Mexican been,with a high degree of success.
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