Studies on the chemical structure and insecticidal activity. IV. Efficiency of locally formulated spray mineral oils.
In Alexandria, Egypt, local products were used to make up 14 formulations containing 6-10% of various emulsifying agents in petroleum distillate (refined solar fraction). At 100 p.p.m., 10 of the formulations caused 97-100% mortality of larvae of a DDT-resistant strain of Culex pipiens L. in tests by the WHO Method [cf. RAE/B 59, 1648, etc.]. At the same dosage, the oil alone caused only 25% mortality and all three emulsifying agents were inactive, showing that the two products were synergistic.<new para>ADDITIONAL ABSTRACT:<new para>In Alexandria, Egypt, single applications of emulsion sprays containing 3% petroleum distillate (refined solar fraction) and various emulsifiers, all locally produced, gave good control of Planococcus (Pseudococcus) citri (Risso) and Ceroplastes floridensis Comst. on guava and Aonidiella aurantii (Mask.) on Citrus for up to 5 weeks after treatment in September 1971.