Crisp apple(such as fuji) should not be cultivated in plastic film bags or without bags.
Especially this year, frequent occurrence of hot weather, the inside of the plastic bag is literally like a steamer.
Infected fruit should also be removed in time to prevent further infection in the orchard.
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Hi Joseph! What kind of bags are you using? Most of the folks I’ve seen using bags have zip locks with ventilation holes to prevent them from cooking the apple.
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Joseph,
Your blanket statement of crisp apples should not be grown without bags is very odd. Most people grow Fuji successfully without bags.
You should tell us where you grow you fruit. Are those the apples you grow? The “infected” fruit do not looked like they are caused by apples being cooked inside the bags. If anything it looks like san jose scale damage.
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Just this week we picked 400 lbs. off one big Fuji tree without any fruit bags. Except for the small size of some of the fruit, the fruit was almost all number one quality. There were some rain cracks at the stem end on a small percentage of the fruit.
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Whether apples need bagging is not a function of the apple but of the insect pressure in your area. I’m in Alaska, not one apple in my dozen or so apple trees gets molested by insects. By the time they begin to ripen enough, most birds that would molest them are already migrating elsewhere.
But if you have to bag and use plastic you need to at the very least cut the bottom cornersof the bag so humidity can drain away.