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Most Common Evening Primrose Plant Pests:
Identification and Treatment Guide

Updated: April 5, 2022

Evening primrose is a beautiful, delicate plant that produces vibrant yellow flowers. It’s a popular choice for gardens and landscaping, but like all plants, it’s susceptible to pests. In this article, we’ll take a look at the most common evening primrose plant pests, how to identify them, and the best treatments to get rid of them.

Spider Mites

Spider mites are tiny pests that can cause significant damage to evening primrose plants. These pests feed on the plant’s sap, which can cause leaves to turn yellow and eventually fall off. Signs of spider mite infestation include webbing on the leaves, small black or red spots on the foliage, and tiny white or black specks moving around on the plant.

The best treatment for spider mites is to use an insecticidal soap or neem oil spray. These products are safe to use on evening primrose plants and will kill the spider mites without harming beneficial insects.


Aphids are another common pest that can attack evening primrose plants. These tiny insects feed on the sap of the plant, which can cause leaves to curl and yellow. You may also notice a sticky substance on the leaves, which is a sign of aphid infestation.

To control aphids, you can use a strong stream of water to wash them off the plant or use an insecticidal soap spray. Ladybugs are natural predators of aphids and can help control their population in your garden.

Slugs and Snails

Slugs and snails are common pests that can attack evening primrose plants. These pests feed on the leaves of the plant, leaving large holes in the foliage. You may also notice slime trails on the leaves or around the base of the plant.

One of the best ways to control slugs and snails is to use a beer trap. Simply bury a shallow dish in the soil near your plant and fill it with beer. The slugs and snails will be attracted to the beer and drown in the liquid.


Cutworms are another common pest that can attack evening primrose plants. These pests feed on the stems of the plant, cutting them off at the base. Signs of cutworm infestation include wilting or yellowing of the plant, as well as small holes in the leaves.

To control cutworms, you can use a biological insecticide or insecticidal soap spray. You can also place a collar made of cardboard or aluminum foil around the base of the plant to prevent cutworms from crawling up and attacking the stem.

Frequently Asked Questions

Can I prevent pests from attacking my evening primrose plants?

Yes, there are several things you can do to prevent pests from attacking your evening primrose plants. First, make sure to keep your garden clean and free of debris, as this can provide a habitat for pests. You can also plant companion plants that repel pests, such as marigolds or lavender.

Are insecticidal soaps safe to use on evening primrose plants?

Yes, insecticidal soaps are safe to use on evening primrose plants. However, it’s always a good idea to read the label and follow the instructions carefully.

Should I use chemical pesticides on my evening primrose plants?

It’s best to avoid using chemical pesticides on your evening primrose plants, as these can harm beneficial insects and pollinators. Instead, opt for natural methods like insecticidal soap sprays or biological insecticides.

In conclusion, evening primrose plants are beautiful additions to any garden, but they are susceptible to pests like spider mites, aphids, slugs and snails, and cutworms. By following the identification and treatment guide outlined in this article, you can keep your evening primrose plants healthy and pest-free.

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