1a.Objectives (from AD-416)
1. Develop and assess new controls for perennial weeds in cranberry beds.
2. Develop and assess controls for blackvine weevil in cranberry beds.
3. Assess organophosphate alternatives for insecticide management on cranberry beds.
1b.Approach (from AD-416)
Field trials will be implemented across numerous growers’ cranberry beds infested with yellow loosestrife (Lysimachia terrestris). Trials will consist of mesotrione, rimsulfuron and quinclorac applied alone and in all herbicide combinations. Research will be conducted to assess adulticides and larvicides for the control of blackvine weevil. Adulticides - each treatment will be applied at the first sign of adult emergence. Larvicides - treatments will be applied to weevil-infested cranberry beds at the end of egg laying in August. Research will be conducted to assess if any of the new alternative insecticide chemistries are as effective for fireworm control as organophosphates when applications are made via chemigation. Documents Grant with Washington State University.
Research focused on developing and assessing new management programs for the most significant pests affecting the cranberry production in the Pacific Northwest. New herbicides were evaluated with two new chemistries showing great promise. These are now on the registration fast track. For the first time since DDT was banned, an effective management strategy for blackvine weevil was developed, using a reduced-risk insecticide. Several other reduced-risk insecticides were shown to be effective replacements for OP chemistries in controlling blackheaded fireworm. This project prevented greater than one million dollars in crop loss and will significantly reduce the risk to the environment from the use of OP insecticides.
Methods of ADODR monitoring included meetings, phone calls and e-mail.