Manganese
In trials, foliar manganese, applied at least twice in the spring, has proven to be most effective at minimizing leaf drop and lenticel blotchiness.
Reducing Lenticel Blotch Incidence in Apples
Lenticel are slightly sunken blotches that result in underlying tissue drying out and becoming brown and spongy. Its occurrence is more prominent than that of bitter pit. Lenticel blotch is associated with hot summers, late harvests and excessive use of nitrogen. Pitting is always associated with a lenticel.
Crop Nutrition and Lenticel Blotch
Calcium
Fruit sprays of calcium, along with soil supply, will help reduce lenticel blotch incidence in apples. The greater the number of sprays the better the fruit quality. It is important to continue spraying right through to harvest.
Related articles
Reducing Bitter Pit Incidence in Apples
Bitter pit is a physiological disorder associated with low levels of calcium in the apple tissue, which reduces apple quality and marketability.
Avoiding Apple Sunscald or Sunburn
Sunscald or sunburn in apples accounts for yellow or flushed areas on the fruit skin due to direct sun damage often following a period of cooler, cloudy weather. In severe instances, the scald damage turns dark while the fruit is still on the tree, with...
Minimizing Incidence of Apple Rots and Diseases
Many disease-causing pathogens (fungi, bacteria, viruses and nematodes) attack apple trees. These may damage the fruit directly, making it unattractive or inedible, but also weaken the apple tree by injuring or invading the leaves, trunk and branches....
