Acrophialophora wilt

Acrophialophora wilt is a significant fungal disease caused by the soil-borne pathogen Acrophialophora fusispora. This fungus acts as a vascular parasite, colonizing the plant's internal tissues and causing systemic dysfunction that often leads to rapid plant senescence and death.

The primary crop affected by this pathogen is chickpea (Cicer arietinum). The infection usually occurs through the root system, where the fungus penetrates the cortex and migrates into the xylem vessels, eventually blocking the water uptake mechanisms required for plant survival.

Symptoms typically start with chlorosis of the lower leaves, followed by progressive wilting. Unlike some other wilt diseases, the foliage may remain attached to the stem while turning yellow or necrotic. In advanced stages, the roots may exhibit significant discoloration, and the vascular system will show clear signs of browning.

Development and spread of the disease are highly favored by high soil temperatures and intermittent moisture levels. The pathogen, Acrophialophora fusispora, thrives in warm, humid soil conditions, making it particularly problematic in tropical and subtropical agricultural environments during the chickpea growing season.

Managing this disease requires a proactive strategy. Key control measures include the implementation of long-term crop rotation to reduce soil inoculum, the use of certified disease-free seeds, and the application of appropriate seed treatments. Improving soil drainage and managing insect populations that cause root damage are also essential for mitigating the impact of the disease.