Investigating the effect of some common fungicides against gray mold disease on greenhouse-grown cucumbers

Gray mold disease in cucumber plants is caused by the fungus Botrytis cinerea, which significantly affects various crops, including beans, lettuce, peas, tomatoes, and cucumbers. The fungus infects all aerial parts of the plant and typically enters through wounds. Spores of this pathogen manifest as gray mold under high relative humidity conditions. Given the severity of the damage caused by this fungus, chemical control measures are essential. Various fungicides exhibit different efficacies against B. cinerea; therefore, identifying the most effective options is crucial. In this study, the fungicides Signum (۱.۵ g/L), Rovral-TS WP (۱ g/L), Luna Sensation ۵۰۰ SC (۰.۴ g/L), Bellkute (۵۰۰ g/ha), Nativo (۱۶۰ g/ha), Daconil (۲ L/ha), and Captan ۷۲% WP (۲.۵ g/L), were evaluated for their effectiveness against the disease. These doses were applied according to the manufacturer’s instructions. The fungicides were tested using a randomized complete block design with four replications, which included two control treatments: one with spraying and one without. All applied fungicides reduced the number of infected fruits and flowers compared to the untreated control. However, Signum and Luna demonstrated the most significant effects, reducing infected flowers by ۴۷% and ۱۷%, respectively. Moreover, these fungicides effectively lowered the amount of fruit shriveled and visible mycelium and spore coverage by ۵۴% and ۲۳%, respectively, compared to the control. Our results indicate that Signum and Luna effectively manage B. cinerea in cucumber greenhouse production.

کلیدواژه ها:

Botrytis ، Conidia ، Cucumber ، in vitro ، In vivo ، Mycelium