Getting Your IPM Program Ready

While winter hasn't really seemed to have started yet in many areas of the province, the growing season is only a couple of months away. Now is the time to consider this year's IPM program for your orchard and order the tools you need in time for spring.

Most registered insecticides are now considered "reduced risk" which means they are highly targeted with short residual activity. It's important to know exactly when these products should be applied in your orchard to ensure optimal efficacy. For many pests, such as codling moth, oriental fruit moth, obliquebanded leafroller and San Jose scale, degree day models which predict the life stages of pests have been developed to precisely time products. For example, the application timings of products for first generation codling moth range from 83-138 DDC (base 10°C) and could be a difference of one or two weeks depending on the temperature in any one year.

To use these degree day models, you will need to put up pheromone traps and weather monitoring equipment in your orchard. For guidelines on how to use traps, check out the Scouting section on Ontario AppleIPM. There you will find information on trap type, number, placement and when to install for each pest. Trapping methods and thresholds for other pests such as European apple sawfly, dogwood borer and apple maggot can also be found here.

Weather monitoring equipment, including temperature, humidity, rainfall and leaf wetness gauges are also important tools for disease forecasting. This information can be used to determine primary scab infection periods or fire blight infection risk. For more details on using disease forecasting models for apple scab and fire blight, see the Diseases and Disorders section on Ontario AppleIPM.

For any Ontario growers planning to use the SemiosBIO monitoring system and puffer mating disruption dispensers, please be aware this company is presently not servicing the province. Updates will be provided should this service become available again in the future.

Visit the OMAFRA website to find a list of Pest Monitoring Equipment Suppliers (Partial List). It is important to store pheromone lures in the fridge until you are ready to put them out.


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca