In raspberries, we can use Ronilan during the 2001 growing season, but not after that. Raspberries, blackberries, strawberries, gooseberries, and currants have been granted a supplemental label for the use of Rally. It is particularly effective against powdery mildew and various rusts. Because we now have Rally for rust control, we will not be requesting an emergency label for Orbit. All berry crops received a label for a material called Messenger.
Messenger is a unique material in that it has no direct pesticidal activity.
The only work with Messenger on berries has been on strawberries. WSU Plant Pathologist, Pete Bristow tried it on a planting of 'Hood' strawberries for botrytis control and had disappointing results. I understand it has been tested in California against botrytis and powdery mildew in strawberries with mixed results. Researchers at OSU and WSU will probably continue evaluating Messenger. All berry crops received a label for a material called Valero.