Xenoacremonium infection

Xenoacremonium infection is a fungal plant disease caused by species within the Xenoacremonium genus. These fungi are typically identified as endophytic microorganisms that, under stress or favorable environmental conditions, transition into pathogenic forms, colonizing the vascular system of the host plant. The genus is significant in modern plant pathology, often misidentified in historical studies due to its resemblance to other Acremonium-like taxa.

The host range of Xenoacremonium includes various agronomic crops, particularly monocots and specific vegetable crops. The fungus acts as a systemic pathogen, invading the xylem and disrupting water and nutrient transport. Because it can reside in plant tissues without causing immediate symptoms, it poses a challenge for early detection and rapid management in agricultural environments.

Common clinical signs of this infection include:

• Progressive wilting and chlorosis starting from the lower leaves.
• Formation of irregular necrotic lesions on the leaf surface.
• Vascular browning visible upon cross-sectioning stems or stalks.
• Significant stunting and overall reduced biomass in infected plants.

Disease development and propagation are heavily influenced by environmental factors such as persistent humidity and moderate temperatures (between 20°C and 25°C). The pathogen is often spread through contaminated seeds, infested soil, and mechanical damage caused by agricultural implements. Because it persists in crop residues, the pathogen can survive between growing seasons, creating a recurring threat in fields where sanitation is neglected.

The economic impact of Xenoacremonium is significant, leading to reduced yield quantity and compromised quality. Integrated management is essential for effective control. Key strategies include using high-quality certified seeds, implementing strict crop rotation protocols to break the pathogen's lifecycle, managing soil moisture to prevent saturation, and utilizing systemic fungicides as a preventative measure in high-risk zones where the pathogen is endemic.