Abstract

This study aimed at evaluating the efficiency of three types of chemical and natural pesticides manufactured in controlling the severity of mildew disease on sesame caused by the fungus Oidium sesames.
The results showed that the chemical pesticide (Decor)was ranked first with the ability to reduce the rate of severity of the incidence of mildew to 0.15 at the end of spraying, while this percentage increased by 91% in the treatment of the witness in the first season 2014. It was significantly higher than the natural insecticide Nimicidine 0.03 and did not differ significantly with pesticide Thiovent 80% (Sulfur). In the second season of 2016, the pesticide reduced the severity of the disease to 10% at the end of spraying, while the ratio was increased by 86 % in comparison to control. It was significantly higher than pesticide nimicidine 0.03 and did not differ significantly with the pesticide Thiovent (80%).
The plants, treated with pesticide Decor, gave the highest productivity in the two seasons 2014 and 2016 at 789 kg/ha and 679 kg/ha and an average production of 734 kg/ha, while the nemididine antibiotic extracted from the Netime tree did not show a significant effect in reducing the severity of infection of the seasons, compared to other pesticides, where the severity of infection 34% and 31% and gave productivity of 695 and 510 kg/ha and an average of 33%, and the average production of seeds 602.5 kg /ha (0.81 and 0.78), yielding 508 and 508 kg/ ha, respectively, with an average incidence of 0.80 and an average yield of 457 kg/ ha.