What is this on my cucumber plant leaves

The plant is in the green house in a grow bag. Am I over wartering it or is it fungal. The plant looks healthy but now the leaf is getting brittle. How can I cure this

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1 Comment To "What is this on my cucumber plant leaves"

#1 Comment By Downtoearthdigs On 05/24/2019 @ 10:50 am

Anthracnose is a fungal pathogen occurring in moist, warm conditions. The first symptoms to appear are circular yellowish spots that turn brown to possibly reddish. The fungal disease may cause all the leaves to have a burned-out appearance and sunken spots develop on the fruit with a pink-colored substance seeping from the spots. Brownish black streaks may also appear on the stems of the plants. Splashing water — from rain or irrigation — will spread this contagious disease from one cucumber plant to another. Once anthracnose is established, it is difficult to control. Fungicides will control this fungal disease if applied at the first sign of infection.
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