As little as one to two inches of snow can provide a favorable micro-climate and protect against potential sub-zero temperatures that can be detrimental to the crown zone of plants. It can also protect plants from cold, dry winds which can make plants like wheat susceptible to dehydration. While snow cover may be beneficial on one hand, it may also be detrimental on the other. Those same favorable micro-climate conditions can also keep pestiferous insects like Grasshoppers, Cabbage Seedpod Weevil
and others from being killed by any ultra-cold temperatures.
Therefore, it is always recommended to scout for insect pest populations during the spring/early summer months to determine if their numbers have reached the “Action or Treatment Threshold”. This threshold is the number of pests that, if not controlled, may continue to multiply and reach the “Economic Injury Level”. This level is defined as a pest population density where the cost of control measures are equal to or greater than the amount of damage caused to the crop. For more information on insect pests, visit our Insect Resources page.