Botrytis elliptica

Botrytis_elliptica

Botrytis elliptica

Botrytis elliptica is a species of fungus that primarily affects Narcissus plants. It is known to cause a disease called narcissus leaf scorch. The fungus infects the leaves of narcissus plants, leading to characteristic symptoms such as yellowing, browning, and necrosis of the foliage.

Symptoms

The symptoms of Botrytis elliptica infection on narcissus plants include yellow streaks on the leaves, which eventually turn brown and become necrotic. In severe cases, the entire leaf may wither and die. The fungus can also infect the flower stems, causing them to rot and collapse.

Disease Cycle

Botrytis elliptica overwinters in infected plant debris and soil. In the spring, the fungus produces spores that are spread by wind, water, and insects to healthy narcissus plants. The spores germinate on the plant surface and penetrate the tissues, leading to infection. Under favorable conditions of high humidity and moderate temperatures, the disease can spread rapidly within a narcissus planting.

Management

To manage Botrytis elliptica infection, it is important to practice good sanitation by removing and destroying infected plant debris. Avoid overhead watering to reduce humidity levels around the plants. Fungicides can be used preventatively to protect healthy plants from infection. Planting narcissus varieties that are resistant to the disease can also help reduce the impact of Botrytis elliptica.