Abstract
Recently there has been increasing concern about citrus scab resistance to Benzimidazole. An examination of sensitivity of Elsinoe fawcetti to Benzimidazole was conducted using Benzimidazole amended potato-dextrose agar. Only two of 42 test strains had growth inhibition at a concentration of more than 1 ppm and were therefore sensitive to Benzimidazole, while 40 strains had floral proliferation even at a concentration of 100-800 ppm, suggesting they had acquired high resistance.
