Metarhizium flavoviride

Metarhizium flavoviride is a well-known entomopathogenic fungus. It is not a plant pathogen; instead, it is classified as a beneficial biological agent utilized extensively in modern agriculture to manage populations of devastating insect pests, particularly locusts and grasshoppers.

The fungus functions by infecting the insect host through direct contact. Conidia (spores) attach to the insect's cuticle, germinate, and penetrate the host's body. Once inside, the fungus colonizes the internal tissues, disrupting the insect's physiological processes and eventually leading to death.

This biological agent is used to protect a variety of agricultural crops, including cereals and pasture grasses, from massive outbreaks of defoliating insects. By controlling pest numbers at the source, it ensures the preservation of plant biomass and maintains the ecological balance of the farmland.

Development and efficacy of this fungus are heavily influenced by environmental factors such as temperature and humidity. It thrives in warm, humid conditions which facilitate the germination of spores. Field applications are most successful when environmental conditions allow for extended spore viability on the surface of the target insect.

Prophylactic measures and application strategies include:

• Monitoring pest population density to trigger early applications;
• Utilizing formulation techniques to enhance spore persistence;
• Applying the bio-control agent during peak activity periods of the target species.