Determination of activity of some fungicides to control apple scab (Venturia inaequalis (CKE) WİNT.) with different pH and temperature

The effect of five different fungicides (Cyprodinil, Propineb, Fluopyram+Tebuconazole, Dodine ve Boscalid + Pyraclostrobin) at the different pH (6,7,8) on Scarlet spur cultivar in Tepeli village of Eğirdir district of Isparta province. was investigated against the apple's scab disease (Venturia inaequalis), which was an important disease of apple in April-May 2013. In addition, the effect of fungicides on the germination and mycelial growth of Venturia inaequalis in different temperatures (15, 20, 25 oC) was investigated. In April, Dodine pH 7 (2.30 %), Bellis pH 8 (4.17 %), Luna pH 6 (4.76 %) and propinep pH 6 (6.47%) were the lowest in the disease severity. The highest disease severity in April was observed in Luna pH 7 (14.56 %). The minimum disease severity in May was found in Luna pH 6 (35.96 %). The germination of V.inaequalis spores rate was the highest in Propineb pH 6 and 20 oC and 25 oC.. The fungicides used in the experiment were affected by the growth of fungal mycelia. Propineb and Dodine were the most effective fungicides and mycelial growth was prevented in all pH applications at 15oC.