عنوان مقاله [English]
Measles is one of the most important fungal diseases in greenhouse cucumber cultivation, which is often very common under favorable conditions in the greenhouse, and fungicides are usually used to control it. Today, due to the increasing restrictions on the use of pesticides, especially for fresh vegetables such as cucumbers, the need for healthier alternatives to control is increasingly felt, and in the near future their use for such products should be completely banned. In the present study, the effect of leaf pruning as well as foliar application of calcium chloride and potassium chloride with a concentration of 100 mM on the control of cucumber superficial whitefly under hydroponic conditions and greenhouse cultivation was studied in a completely randomized design. The results showed that treatment of plants with both forms of calcium chloride and potassium chloride significantly reduced the severity of infection compared to control plants. Leaf pruning alone had no significant effect on contamination control except for the number of fungal colonies per pot, but in the combined use of leaf pruning and calcium chloride treatment, surface blight was reduced to a more effective extent. Foliar application of these compounds in the plant led to a decrease in leaf contamination, increased plant fresh weight and chlorophyll index and also a significant increase in water consumption compared to control plants. The results indicate that foliar application of calcium and potassium chloride can be a good alternative to cucumber surface control toxins, especially during fruiting. On the other hand, these substances as nutrients required by plants are better compatible with human and environmental health standards.