Acrasiaceae

Acrasiaceae is a family of slime molds belonging to the class Acrasiomycetes. In agricultural settings, these organisms interact with the rhizosphere, often acting as opportunistic pathogens that thrive in the soil environment and affect the vitality of various cultivated plant species.

The causative agent exists in the form of individual amoeboid cells during the vegetative stage. Unlike true fungi, they do not produce mycelium. The disease type is characterized as an opportunistic root infection, which often precedes secondary infections caused by bacteria or filamentous fungi.

Crop species most commonly affected include vegetables, especially in nursery settings, as well as certain legumes and grains. The vulnerability is highest during the early seedling stages when the root architecture is developing and susceptible to changes in the surrounding soil microflora.

Symptoms of infestation often appear as stunted growth, chlorosis of the lower leaves, and necrotic lesions on the roots. Because these symptoms are non-specific, laboratory analysis is often required to confirm the presence of Acrasiaceae as the primary or contributing factor to plant stress.

Development and spread are facilitated by waterlogged, anaerobic soil conditions and high levels of organic decay. Preventive measures focus on improving soil drainage, balancing soil pH, and ensuring proper crop rotation to break the cycle of pathogen buildup. Chemical control is limited to preventive soil sterilization and systemic fungicide application.