Development & delivery of OP alternatives for borer control in MI tree fruit
This project team will develop and deliver multifaceted implementation strategies, tailored for the special requirements of MI fruit production systems, to control a complex of trunk-boring insect pests of apple, cherry and peach trees in MI. Pheromone mating disruption, USEPA rated reduced risk insecticides and entomopathogenic nematodes will be incorporated into pest management programs on a minimum of six commercial and research farms to develop the most economical and effective incorporation of these products for control of greater peachtree borer, lesser peachtree borer, dogwood borer and American plum borer.
Research in MI into the inclusion of mating disruption for greater and lesser peachtree borers and trunk sprays of the reduced-risk insecticide, acetamiprid, for control of the borer species complex shows that these new control materials are effective at controlling target pest populations. Entomopathogenic nematodes applied as trunk sprays for dogwood borer control will be evaluated in organic and conventional apple plots on MSU research farms.
Current borer management programs rely on trunk applications of the organophosphorous insecticide, chlorpyrifos, which is targeted for withdrawal by the USEPA. The development and implementation of effective, multiple approaches for borer control with biopesticides, reduced-risk insecticides and biological control agents will make pome and stonefruit pest management programs more sustainable and profitable. Educational field days will be conducted in three fruit growing regions of the state to highlight project results.
Project goals and objectives
The overall aim of this project is to develop, optimize and deliver management strategies to control the complex of trunk-boring insects for upper Midwest tree fruit production systems that are efficacious and economically sound. The specific performance targets are:
1) Deploy and demonstrate pheromone mating disruption for control of the lesser peachtree borer, Synanthedon pictipes (Grote and Robinson) and the peachtree borer, S. exitosa (Say) in cherry.
2) Determine and demonstrate the effectiveness of the insecticide, acetamiprid, as a trunk spray for control of trunk-boring insects in MI tree fruit.
3) Determine and demonstrate the effectiveness of entomopathogenic nematodes as a control of trunk-boring insects [lesser peachtree borer, peachtree borer, American Plum Borer, Euzophera semifuneralis (Walker), and Dogwood borer (DB), Synanthedon scitula (Harr.)] in cherry and apple.
Overall Project Measures
1.# Acres impacted by project: Apple, Peach, and cherry account for ca. 81,000 acres in MI, alone.
2.The % reduction in high-risk pesticides: 25-50% in OP and organochlorine use.
3. Becker Underwood and Pacific Biocontrol are supplying limited amounts of EPN and MD to the project team for use on project acreage.
4. Current/projected level of borer management: Current level is 1; end of project it should be 4.