This study evaluated the efficacy of various fungicides on disease control, yield, and yield components of cucumber crops under field conditions during the 2021-22 season. Disease incidence, number of fruits per plant, length and weight of fruits per plant were assessed for different fungicide treatments, including Aliette, Topsin-M, Antracol, Copper oxychloride, and a control plot. Results indicated that Aliette and Topsin-M treatments exhibited the lowest disease incidence at 6.22% and 7.88%, respectively, showcasing their superior disease control. Antracol and Copper oxychloride demonstrated moderate disease control, while the control plot exhibited the highest disease incidence at 68.30%. Regarding yield components, Aliette and Topsin-M treatments resulted in the highest number of fruits per plant (16.23 and 14.98), longer fruits (22.91 cm and 23.86 cm), and the highest weight of fruits per plant (4.38 kg and 4.32 kg). Conversely, Antracol and Copper oxychloride treatments showed lower fruit counts, shorter fruit lengths, and lower fruit weights. The study concludes that Aliette and Topsin-M fungicides hold promise for effective disease control and improved yield in cucumber crops, emphasizing their potential for enhancing overall crop performance under field conditions.

Key words: Cucumber, Powdery mildew, and fungicides