Curvularia blight

Curvularia blight is a severe fungal disease caused by the pathogen Curvularia tuberculata. This disease primarily affects the foliage and fruit tissues of host plants, significantly impairing their physiological functions and causing substantial aesthetic and economic losses in commercial horticulture.

A notable host for this pathogen is the Indian mango (Mangifera indica), where it causes widespread necrotic spots. The disease is known to be a limiting factor in fruit quality, often leading to post-harvest decay and premature fruit drop, which reduces the marketability of the produce.

Symptoms typically begin as small, chlorotic spots that gradually expand into dark brown or black lesions with distinct margins. In conditions of high humidity, these lesions may exhibit a dark, velvety appearance due to the extensive sporulation of the fungus, leading to blight-like symptoms across the affected tissue.

The development and spread of the disease are highly dependent on environmental factors, particularly warm temperatures and high humidity levels. The spores of the fungus are easily disseminated by wind currents, splashing rain, and contaminated pruning tools, allowing the infection to spread rapidly through plantations during rainy seasons.

Control strategies for Curvularia blight emphasize both preventative measures and chemical interventions. Key practices include maintaining orchard hygiene by removing infected plant debris, optimizing plant spacing to enhance airflow, and applying protective fungicides during periods of high disease pressure to safeguard the crop and ensure sustainable production.