Pathological Studies of Some Local Isolates of S. sclerotiorumondifferent crops and Evaluation the Efficacy of Some Fungicides toControlLettuce White Mold.
الكلمات المفتاحية:
White rot disease، Lettuce, Disease severity، Disease incidence، Rovralالملخص
This study was conducted to record the disease incidence (DI%) and disease severity (DS%) of the white rot disease caused bySclerotiniasclerotiorumon different cropsat seven sites of Tripoli; Ain Zara, Wadi Al Rabee, Jenin, Al-Mudhal, Al-Qiu, Al-Baish, Nashiaa.A total of 48 plant samples were collected during this study.Results revealed that percentage of disease incidence varies among the surveyed locations.
S. sclerotiorum lettuce isolates SS8 and SS3 were the most destructive isolates.Results indicated that the five selected lettuce varieties showed different susceptibility to white rot.Crisphead was the high susceptible cultivar. Five fungicides were used at recommended dosein vivo to control S. sclerotiorumonlettuce.Resultsshowed that Rovralwas the most effective with (89%) of disease inhibition, followed bySwith WG 62.5 at 80%,whiletheTopsin M 70% WP was the least effective with 50% compared tocontrol.
