GRANDICE

High resistance (HR): plant varieties that highly restrict the growth and/or development of the specified pest and/or the damage it causes under normal pest pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest pressure. Intermediate resistance (IR): plant varieties that restrict the growth and/or development of the specified pest and/or the damage it causes but may exhibit a greater range of symptoms or damage compared to high resistant varieties. Intermediate resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest pressure.

Performance may vary from location to location and from year to year, as local growing, soil and climatic conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower’s operation. Any recommendations provided on this webpage are based upon observations and feedback received from a limited number of trials and geographies. These recommendations should be considered as one reference point and should not be substituted for the professional opinion of agronomists, entomologists or other relevant experts evaluating specific conditions. De Ruiter® is a registered trademark of Bayer Group. All other trademarks displayed on this site are either registered or unregistered trademarks of Bayer Group, one of its related affiliates or others and used by permission. © 2004 – 2025 Bayer Group. All rights reserved.