Grape Insect Pests
|Major||Present in most vineyards in most years and usually causing economic damage if not managed.|
|Minor||Often present but usually not causing economic damage and not requiring management.|
|Impending||Pest is not known to occur in Midwestern states but is likely to appear in the future.|
Grape Growth Stages
The (colored) boxes represent the crop stages where common pests in the Midwest are active and action (scouting and preventative sprays) may be necessary/recommended.
|Grape Growth Stage|
|Delayed Dormant through Bud Swell||Bud Break||4- to 10-inch Shoots||Pre-bloom through Bloom||Bloom||Shatter||Shatter to Veraison||Veraison to Harvest||Post-harvest|
|Grape flea beetle|
|Rose chafer||Rose chafer|
|Grape berry moth|
|Multicolored Asian lady beetle|
|Green June beetle|
|Grape root borer|
|Grape mealybug||Grape mealybug|
|Grape scale||Grape scale|
Effectiveness of Insecticides and Miticides for Grape1 (last updated 11/2021)
Grape insecticide efficacy table (sortable) - Pest common from Dormant to bloom
Grape insecticide efficacy table (sortable) - Pest common Shatter to post-harvest
Effectiveness of Fungicides for control of Grape Diseases1 (last updated 11/2021)
Grape fungicide efficacy table (sortable)
1Efficacy data in this publication are based on trials conducted across various regions and do not necessarily reflect local efficacy differences or changes over time. Growers should contact their Extension specialist for the most recent or for state-specific information. The information on this publication is only a guide; the authors and their institutions assume no liability for practices implemented based on this information. Always read and follow pesticide labels. The label is the law. Product registration may vary by state. E= excellent control; G=good control; F= fair control. [r] = Fungicide/Insecticide resistance possible. s= suppression only, i= not effective, u= effectiveness unknown, x= pest not on the label.
2 F/IRAC code represents the mode of action of the insecticide/fungicide.
3 All insecticides have a Restricted-Entry Interval (REI). The restricted-entry interval is the time immediately after a pesticide application when entry into the treated area is limited. Check labels for REI. Restrictions in REI may prohibit the use of certain pesticides during harvest.
4 PHI refers to the pre-harvest interval, which is the number of days before harvest that the product may not be applied.
Applicators must abide by both maximum amount of product per season AND maximum number of applications.
5 Max amt refers to the product’s maximum amount/ acre/year. Applicators must abide by both maximum amount of product per season AND maximum number of applications.
6 Max app refers to the product’s maximum number of applications per year. Applicators must abide by both maximum amount of product per season AND maximum number of applications.