Most Common Hops Plant Pests:
Identification and Treatment Guide

Hops plants are susceptible to a variety of pests that can cause significant damage if left untreated. As a hops plant grower or enthusiast, it is crucial to be able to identify these pests and understand how to effectively treat and prevent infestations. In this article, we will discuss some of the most common hops plant pests, their identification characteristics, and the best treatment methods.

Spider Mites

Spider mites are tiny pests that feed on the sap of hops plants, causing leaves to turn yellow and develop small, white specks. As their name suggests, these pests produce fine webbing, which can cover the foliage if the infestation is severe. Spider mites thrive in hot and dry conditions, making hops plants particularly vulnerable during the summer months.

To identify spider mite infestations, examine the undersides of leaves for tiny moving specks or webbing. Another tell-tale sign is the presence of yellowing or stippling on the upper surface of leaves.

The best treatment for spider mites is to increase humidity levels around the plants. Regularly misting the foliage with water can help deter these pests. Additionally, introducing natural predators like ladybugs or spraying neem oil solution can be effective in controlling spider mite populations.

Aphids

Aphids are soft-bodied insects that suck sap from the new growth of hops plants. These pests reproduce rapidly, forming large colonies that can cause stunted growth and deformed leaves. Aphids are typically green or black in color and can be found in clusters on the undersides of leaves or curled up within new shoots.

To identify an aphid infestation, look for curling leaves or sticky residue on the foliage, which is caused by their sugary excrement known as honeydew. You may also notice ants nearby as they are attracted to this sweet substance.

To treat aphids, start by removing infested leaves or shoots to prevent the spread of the colony. Insecticidal soaps or neem oil sprays can also be effective in controlling aphid populations. Introducing beneficial insects such as ladybugs or lacewings can provide long-term control by feeding on aphids.

Japanese Beetles

Japanese beetles are metallic green insects that feed on the foliage and flowers of hops plants. They skeletonize leaves, leaving behind a lacy appearance. These pests can quickly defoliate a plant if left unchecked.

Identifying Japanese beetle infestations is relatively easy due to their distinct appearance. Look for shiny green beetles with coppery wing covers on the foliage or flowers of hops plants.

To control Japanese beetles, manually remove them from the plants by handpicking or shaking them into a bucket of soapy water. Applying insecticides labeled for Japanese beetle control can also help reduce their numbers. However, be mindful of using chemical treatments if you plan to use the hops flowers for brewing, as residues may affect the quality of your final product.

Cutworms

Cutworms are caterpillars that hide in the soil during the day and emerge at night to feed on the stems of young hops plants near ground level. They chew through the stem, causing the plant to wilt and die. Cutworms are often gray or brown in color and curl up when disturbed.

To identify cutworm infestations, check for wilting or severed stems near ground level. You may also find cutworm larvae hiding under plant debris or loose soil during the day.

Preventing cutworm damage can be achieved by placing collars around the base of young hops plants to create a barrier between the stems and the soil. Applying biological insecticides containing Bacillus thuringiensis (Bt) can also be effective in controlling cutworm populations.

Conclusion

Identifying and treating common pests is essential for the health and productivity of hops plants. By regularly inspecting your plants for signs of infestation and implementing appropriate treatment measures, you can minimize the damage caused by these pests. Remember to choose environmentally friendly treatment options whenever possible to preserve the quality of your hops and the overall sustainability of your garden or farm.