Hazelnut Weed Management

Weed management is critical to ensuring the good health of a hazelnut orchard. Weeds reduce nutrient availability, interfere with tree growth, and reduce hand-harvesting efficiency. To control weeds, a common practice is to apply herbicides down the tree row and flailing (mowing) between rows.

Herbicide Control

Herbicides registered for use in hazelnuts fall into two classes: pre-emergent and post-emergent. Materials in these categories can be combined to get a knock-down and hold-down effect in one application. For best results, always follow the directions on material containers. This makes you aware of the restrictions placed on the product used (such as use on new vs. established plantings). Be sure to rotate the materials in use on the orchard to reduce the development of chemical resistance. When applying chemicals, ensure all safety protocols are met and worker safety is observed. This falls in accordance with federal and provincial regulations on pesticide use, application methodology, environmental impacts and worker safety regulations.

Take Note: In wet weather, weeds might become so abundant that they prevent or hinder normal harvest operations. If there is a possibility of abundant weed growth in the following year, apply a late-season, soil-residual herbicide to prevent weed germination. Always ensure that any herbicide used has been checked for any potential effects on the hazelnut trees.