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.

Damage to apple trees reduces productivity and increases susceptibility to winter injury or attack by additional pests.

The most common diseases are rust, scab, different rots and fire blight. Attacks from a variety of insects and mites are frequent too. Good crop nutrition is essential to promote the health of apple plants and make them more resistant to pests.

Crop Nutrition and Apple Rots and Diseases

Potassium

It is important that potassium concentrations are in balance with other cations, particularly calcium, as preferential uptake of potassium over calcium will significantly increase the risk of rotten fruit and physiological disorders.

Calcium

Storage rots including Gloeosporium rot and penicillium can be minimized by use of calcium. Repeated foliar applications are the most effective at alleviating this kind of damage.

Related articles

apple

Role of Nutrients by Apple Growth Stage

Here you find an overview of the role of nutrients by apple growth stages.
Reducing bitter pit incidence in apples

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.
Minimizing apple internal breakdown

Minimizing Apple Internal Breakdown

Internal breakdown in apple is the breakdown of internal tissues resulting from fluid oxidation. In severe cases, tissues become spongy. It can be associated with intense water core disorder, cold storage, and boron and phosphorus deficiencies. A good...

See all articles about apple crop nutrition