1a.Objectives (from AD-416):
To determine infection rates among species of white grub complex, compare formulations for efficacy, and evaluate application timing and application rates.
1b.Approach (from AD-416):
White grubs are pests of turf because they feed on roots of grass plants and are typically controlled by the application of chemical insecticides. This project evaluates fungal biopesticides made with Metarhizium anisopliae as an alternative to chemical control. The unique aspect of this proposal is that the fungus is applied in a unique form. Recent discoveries using liquid fermentation techniques have resulted in production of a fungal structure known as microsclerotia. This structure can be formulated for application to soil environments where the microsclerotia germinate and each produced many infective conidial spores. Objectives include:. 1)compare formulations of the fungal biopesticides for control efficacy when applied under field conditions, and. 2)determine rates and timing of applications for optimal grub control under field conditions.
This is a new agreement to evaluate experimental formulations for efficacy under field application conditions. Sample formulations are currently in production for application to field plots in late July and early September. In addition to the field evaluations, field collected beetles will be assayed in the laboratory for susceptibility to treatments.