Biology and Management of Invasive Insect Pests in Michigan Vineyards
- Research Date
- 2014
- Authors
- Keith Mason, Steven Van Timmeren, Nikki Rothwell, Rufus Isaacs
- Priorities
- Best Practices, Crop Quality, Pest Management
- Crop Categories
- Grapes
- Beverage Categories
- Wine
At twenty vineyards across Michigan, pheromone traps were used to monitor for European grapevine moth, light brown apple moth and the summer fruit tortrix, and none of these moths were detected. SWD and African fig fruit fly were monitored with baited traps. Spotted wing drosophila was found in traps at all vineyards and detections were earlier in the southern portion of the state. The highest levels of SWD populations in all regions occurred during grape harvest. No fig fruit flies were detected in our traps in 2014 and no brown marmorated stink bugs were found at any of the twenty focal vineyards. Our data suggest that early ripening red varieties may be the most susceptible to SWD infestation, but infestation by other vinegar flies (Drosophila species) did not show any trends among grape varieties. There was a significant positive relationship between the number of fruit flies that emerged and the severity of sour rot.