Apple trees require a certain number of hours per ... Covering the apple prevents those fungus spores from spreading on the fruit. The bags can be left on the apples until you're ready to harvest.

These spores can be mass produced and used in high ... This includes using them on apple trees that grow under cover (such as ...

The fact that apples grown from seedling trees are extremely tart and basically inedible — as opposed to cloned or grafted ...

and he favors delaying apple tree pruning until the time when the flower buds start swelling and through the start of leaf emergence. As Walla indicates, the risk of black rot canker fungus ...

To see how reduced oxalate affects the fungus' ability to attack a plant, view the following time-lapse video of an "Apple test" used to measure fungal virulence (long version viewable on YouTube).

This helps pruning cuts seal more rapidly, leaving less tissue open to invasion by the black rot fungus. Walla’s observations about delayed pruning are well worth noting. I’m following his ...