Show Thorough Study of Oil Emulsion as Insecticide A thorough study of oil emulsions for use as Insecticides has has' been begun begun begun be be- gun b by the bureau of entomology of the time United States Department of A Agriculture Agriculture Agri Agri- rl- rl culture during the past year and Important important Im im- im- im progress has hus been made especially es es- es- es I toward Increasing the stabIlIty stability ity of emulsions In hard water and sulphur lime-sulphur solutions The Investigation Investigation gation bation of miscellaneous insecticides has been continued at the time laboratories In Washington and at the time nearby field station at nt Silver Spring Md and cooperative cooperative co co- operative tests on a n commercial scale are made by the time Washington laboratories labor labor- atones and various field stations on new or improved preparations What appears to be a new contact Insecticide insecticide cide cille which will vIll In man many instances be bea a suitable substitute for nicotine at a lower cost has hns been developed by two offices of the bureau operative co v. v This Insecticide mixes well with oil emulsions and It Is believed will make an excellent spray for the time delayed delayed de de- Ic- Ic layel dormant treatment for the simultaneous control of the time San Jose scale cale and apple aphids |