Hazelnuts are wind pollinated but it is still important to be aware of pollinator activity in and around the orchard. Bees sometimes forage on hazelnut pollen and they can be present in the orchard throughout the growing season foraging on flowering weeds and hedgerows. Infestations of sucking insect pests such as aphids and scale produce honeydew, which can be highly attractive to pollinators. Take extra care to protect pollinators when utilizing flowering cover crops in orchards. Note bee warnings on pesticide labels and time applications to avoid bee kills.
The following suggests the amount of each spray material per acre when applied to mature trees. The size of trees, amount of foliage, type of equipment used, and other factors are important in determining the amount of spray to use per acre. Read carefully the entire label of each material that is to be used. Under present federal regulations, it is unlawful to apply any pesticide in a manner, rate, or dilution that is not so prescribed on the label. Check with the county agent or Agricultural Research Center in your area if there are any discrepancies between the recommendations in this handbook and a pesticide label. Practice integrated pest management (IPM) principals and avoid unnecessary or prophylactic insecticide use. Use scouting and monitoring to determine whether pest problems justify management.
Note: Products are listed in alphabetical order and not in order of preference or superiority of pest control.