[Objective] The research aimed to study the chemical control of celery leaf spot and stabilize the celery production.[Method] The occurrence characteristics of celery leaf spot were investigated by diagonal quincunx sampling method.10% and 20% difenoconazole water dispersible granule were used in the test of medicament control.[Result] The primary infection source of celery leaf spot was mainly seed or residual diseased plants.The optimum temperature for the development of symptoms was 22~30 ℃ and the relat...