My onion fungal infection in 2018 looked worse than yours, but when the weather dried 90% of the onions recovered and I had a fine crop. The garlic bed next to the onions had fine looking foliage but about 25% of the crop was rotted. Part if that was likely due to excessive nitrogen feeding, like 590 lbs N/acre. I reduced the nitrogen to 250 lbs N/acre in 2019 and had a great garlic crop.
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