Location: Horticultural Crops Research Unit
Project Number: 2072-21220-003-013-R
Project Type: Reimbursable Cooperative Agreement
Start Date: Sep 1, 2016
End Date: Dec 31, 2019
Objective:
Determine timing of field transmission of Grapevine redblotch associated virus
Approach:
Trap plants will be placed in two vineyards at monthly intervals throughout the growing season. All plants will be potted and maintained in a screenhouse without any insecticides prior to the field trial. Plants will be transported to the vineyards on the first of the month for the months of April through September. After the month, the plants will be swapped out, and returning plants will be returned to a screenhouse in Corvallis and treated with a systemic insecticide.
Plants will be tested for Grapevine redblotch associated virus (GRBaV) and Grapevine leafroll associated viruses 1, 2 and 3 before they are taken to the field to ensure they are disease free.
A select number of leaves will be sprayed with a sticky substance to trap weak flying insects. These leaves will be removed when the plants are brought back to Corvallis and stored for later use. Leaves from sample sets with plants that test positive for GRBaV will be examined for insects and potential vectors identified. The insects present on leaves from sample sets with GRBaV positive plants will be compared to insects on leaves from sample sets where there was not any transmission in the field.
