Monilinia laxa

Monilinia laxa is a fungal pathogen that primarily affects stone fruit trees, including peach, apricot, cherry, and plum trees. It is commonly known as brown rot and is a significant problem in many fruit-growing regions worldwide.

Description

Monilinia laxa is characterized by its ability to cause blossom blight, twig blight, and fruit rot. The fungus produces spores that are spread by wind and rain, infecting the blossoms and young shoots of the host plant. The infected parts of the plant often exhibit a brown, rotting appearance, hence the common name "brown rot".

Life Cycle

The life cycle of Monilinia laxa begins with the production of spores in the spring, which are spread to the blossoms of the host plant. The fungus then infects the blossoms, causing them to wilt and turn brown. The fungus continues to grow and produce more spores, which can infect other parts of the plant or other plants in the vicinity.

Control

Control of Monilinia laxa involves a combination of cultural practices and chemical treatments. Cultural practices include pruning infected branches, removing infected fruit, and maintaining a healthy, well-balanced tree. Chemical treatments typically involve the application of fungicides during the blooming period to prevent infection.

Impact

The impact of Monilinia laxa is significant, particularly in commercial fruit-growing operations. The fungus can cause substantial yield losses and reduce the quality of the harvested fruit. In addition, the cost of control measures can be substantial.

See Also

• Monilinia fructicola
• Monilinia fructigena
• Stone fruit