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Plum curculio beetles can cause irreparable damage to a fruit harvest. In badly damaged fruit, one can identify large scars and bumps due to feeding. Most internally damaged fruit (through burrowing into the fruit) drops prematurely.
Drops of orange liquid may be visible on the spots. Later in the season, black dots appear on the orange spots on the upper leaf surface. In late summer, tube-like structures develop on the undersurface of the apple leaf. Infected leaves sometimes drop prematurely, particularly during drought conditions or when the tree is under additional stress.
It is very sweet, with an unusual flavor of sugar cane, or spicy cherry candy. The fruit can store for 5 to 8 weeks. The Sweet Sixteen is quite vigorous. The fruit may have premature drops. Sweet Sixteen usually ripens, mid- to late September. [2] The Sweet Sixteen is resistant to fire blight and scab.
Young fruit, often infected by foliar conidia, can also display similar symptoms to infected leaves. In this case the lesions progress to bare, brown and corky spots. The apple skin and flesh can split open as the fruit enlarges, though young fruits often prematurely drop.
Brooks fruit spot is a minor disease of the apple and is found mostly throughout the Northeast and Mid-Atlantic regions. As the fruit first emerges the disease appears as dark green lesions on the fruit of the apple. As the apple begins to emerge these blemishes grow and change to purple or green. [14]
Apple chat fruit MLO, also known as "apple small fruit" and "chat fruit of apple", [1] is a mycoplasma-like organism (MLO) [2] that affects only apple trees, specifically Lord Lambourne and Tydeman's Early Worcester, [3] though in North America, Turley, Winesap, Jonathan, and Golden Delicious can be affected. [4]
Bitter pit in the 'Summerred' cultivar Signs of bitter pit beginning on one apple, lower left. Bitter pit is a disorder in apple fruits, now believed to be induced by calcium deficiency. It occurs less commonly in pears. The disease was probably first reported in Germany where it was known as Stippen. [1]
Apple scar skin = apple dapple, apple sabi-ka, apple bumpy fruit Apple scar skin viroid (ASSVd) Suspected viral- and viroid-like diseases ...