Phomopsis citri

Phomopsis citri is a fungal pathogen that primarily affects citrus plants. It is the causative agent of a disease known as Phomopsis Canker, which is a significant problem in citrus production worldwide.

Overview

Phomopsis citri is a member of the Ascomycota phylum, which includes a wide variety of fungal species. The fungus is known for its ability to infect and cause disease in citrus plants, including oranges, lemons, grapefruits, and limes.

Symptoms and Diagnosis

The primary symptom of Phomopsis Canker is the formation of cankers, or lesions, on the branches and twigs of the citrus plant. These cankers are often sunken and have a rough, corky texture. The disease can also cause leaf drop and fruit drop, which can significantly reduce the yield of the affected plant.

Diagnosis of Phomopsis Canker is typically done through visual inspection of the affected plant and laboratory testing. The fungus can be isolated from the cankers and identified through microscopy or molecular techniques.

Management and Control

Management of Phomopsis citri involves a combination of cultural practices and chemical control. Cultural practices include pruning and removing infected branches to prevent the spread of the fungus. Chemical control typically involves the application of fungicides.

Impact

Phomopsis citri has a significant impact on citrus production worldwide. The disease can cause substantial yield losses, and in severe cases, can lead to the death of the affected plant.

See Also

• Citrus production
• Plant pathology
• Fungicide