Diaporthe rudis

Diaporthe rudis is a dangerous phytopathogenic fungus belonging to the kingdom Fungi, division Ascomycota, and the genus Diaporthe. This microorganism acts as a causative agent for various necrotic and canker diseases affecting a wide range of plants, including fruit trees, berry bushes, and several field crops.

The primary harmful impact of this pathogen involves the infestation of stems, branches, and shoots. The affected areas develop necroses, cankers, and dying zones, which disrupt normal nutrient transport. As a result, plants lose productivity, experience premature leaf drop, and, in cases of severe infection, may suffer from the death of individual branches or the entire plant.

The life cycle of Diaporthe rudis is characterized by its ability to persist in plant debris, fallen leaves, and damaged bark for extended periods. During the spring, when favorable conditions arise, the fungus produces spores that are dispersed by wind and rain splashes. Primary infection occurs through micro-cracks, pruning wounds, or mechanical damage to plant tissues.

The development of the infection is favored by high air humidity, frequent precipitation, and moderate ambient temperatures. Crowded planting patterns and lack of proper canopy ventilation significantly increase the risk of widespread disease outbreaks. The fungus actively colonizes stressed or weakened plants, making proper cultural practices a crucial factor in suppressing epidemics.

To effectively protect crops against this pathogen, an integrated approach is recommended, including the following measures:

• Timely sanitary pruning and destruction of infected shoots.
• Disinfection of horticultural tools after working with infected material.
• Maintaining optimal plant spacing to ensure adequate air circulation.
• Application of preventive fungicides during periods of active growth.
• Removal and proper disposal of plant debris that serves as an infection reservoir.