Introduction 

Cashew farming is a significant agricultural practice that contributes substantially to the economy of many tropical countries. However, like any other crop, cashew trees are susceptible to a variety of diseases that can drastically reduce yield and quality. Effective disease management is crucial for ensuring healthy growth and maximizing production. In this blog, we will explore the common diseases that affect cashew trees, their symptoms, and the best practices for preventing and controlling these diseases. By understanding and implementing these management strategies, farmers can safeguard their cashew orchards and ensure a bountiful harvest.

Angular leaf spot

Symptoms

Angular cream colored lesions with dark-brown margins on leaves of seedlings; angular black lesions with chlorotic halos on mature trees; defoliated seedlings.

Management

Currently no control measures are used.

Anthracnose (Colletotrichum gloeosporoides)

Symptoms

Water-soaked lesions on leaves, twigs, flowers or young apples which develop into orange-brown or red lesions;

Management

A protective coating of copper-based fungicide on susceptible parts of plant can prevent the disease; fungicide should be applied when buds begin to expand through to fruit set but are not required during dry periods

Black mould (Pilgeriella anacardii)

Symptoms

Chlorotic spots on upper surface of leaves which spread to lower surface as infection progresses; dark-brown to black fungal patches on leaves; leaves shrivelling and dropping from plant.

Management

Effective management involves a combination of cultural practices, chemical treatments, and regular monitoring. Start by ensuring proper orchard sanitation and pruning to improve air circulation, which helps reduce humidity and the spread of the fungus. Apply fungicides, such as copper-based products or systemic fungicides, following recommended guidelines and timing for maximum efficacy. 

Conclusion

Effective disease management in cashew cultivation is pivotal for ensuring healthy and productive orchards. By implementing integrated disease management strategies, including regular monitoring, appropriate cultural practices, and the judicious use of fungicides, growers can significantly reduce disease incidence and severity. Moreover, staying informed about the latest research and advancements in cashew disease management will help farmers adopt the most effective and sustainable practices. At Khethari Agri Tech Private Limited, we are committed to supporting farmers with innovative solutions and expert advice to combat diseases and enhance the overall health of their cashew crops. By working together, we can ensure a thriving and resilient cashew industry for the future.