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What Is Eating My Mums? Identifying and Managing Common Pests 2024

Mums, or chrysanthemums, are beloved for their vibrant blooms and are a staple in many gardens. However, pests can pose a significant threat to these beautiful plants. If you’re wondering what’s eating your mums, this guide will help you identify common pests and provide tips on how to manage them effectively. Keep reading to protect your mums and enjoy their full beauty.

Key Highlights

  • Common pests include aphids, spider mites, and caterpillars.
  • Signs of pest damage include chewed leaves, discoloration, and webbing.
  • Regular inspection and proper care can prevent infestations.
  • Natural and chemical treatments are available for pest control.

Identifying Common Pests Eating Mums


Aphids are tiny, soft-bodied insects that can be green, black, brown, or pink. They cluster on the undersides of leaves and stems, sucking the sap and causing leaves to yellow and curl. Aphids also excrete a sticky substance called honeydew, which can attract ants and lead to the growth of sooty mold.

Spider Mites

Spider mites are minuscule pests that are often difficult to see with the naked eye. They thrive in hot, dry conditions and can cause significant damage to mums. Look for fine webbing on the undersides of leaves, stippling or yellowing of the leaves, and a general decline in plant vigor.


Caterpillars, such as the chrysanthemum webworm and other moth larvae, can chew large holes in the leaves and flowers of mums. These pests are often easy to spot due to their size and the noticeable damage they cause.


Thrips are tiny, slender insects that feed by puncturing plant cells and sucking out their contents. They can cause stippling, discoloration, and scarring on the leaves and flowers. Thrips are often found inside the blooms, causing them to become distorted and discolored.

Slugs and Snails

Slugs and snails are common garden pests that feed on the foliage of mums, leaving irregular holes and a slimy trail. They are most active at night and during damp conditions.

Signs of Pest Damage

Chewed Leaves

Large, irregular holes in the leaves are a clear sign of caterpillars or beetles. This type of damage is usually easy to spot and often occurs quickly.

Discoloration and Stippling

Yellowing or stippling on the leaves can indicate an infestation of spider mites or thrips. These pests suck the juices from the leaves, causing them to lose their color and vitality.


Fine webbing on the undersides of leaves is a telltale sign of spider mites. The webbing can protect these pests and their eggs from predators and harsh environmental conditions.

Honeydew and Sooty Mold

A sticky substance on the leaves, known as honeydew, can attract ants and lead to the growth of sooty mold. This is often a sign of an aphid infestation.

Preventing and Managing Pest Infestations

Regular Inspection

Regularly inspect your mums for signs of pests. Check the undersides of leaves, stems, and flowers. Early detection is key to managing infestations before they become severe.

Proper Watering and Fertilization

Healthy plants are more resistant to pests. Ensure your mums receive adequate water and nutrients. Avoid overhead watering, which can create a favorable environment for pests and diseases.

Natural Predators

Encourage natural predators like ladybugs, lacewings, and predatory mites in your garden. These beneficial insects can help control pest populations.

Neem Oil and Insecticidal Soap

Neem oil and insecticidal soap are effective, organic treatments for many common pests. Apply these treatments according to the label instructions, ensuring thorough coverage of the affected plants.

Chemical Treatments

For severe infestations, chemical insecticides may be necessary. Choose a product labeled for use on mums and follow the instructions carefully. Use chemical treatments as a last resort to minimize harm to beneficial insects and the environment.

Table: Common Pests and Signs of Damage on Mums

PestSigns of DamageControl Methods
AphidsYellowing, curling leaves, honeydewNeem oil, insecticidal soap, natural predators
Spider MitesStippling, yellowing, webbingNeem oil, insecticidal soap, proper watering
CaterpillarsLarge holes in leaves and flowersHand-picking, Bacillus thuringiensis (Bt)
ThripsDiscoloration, scarring, distorted bloomsNeem oil, insecticidal soap, blue sticky traps
Slugs and SnailsIrregular holes, slime trailsHand-picking, iron phosphate bait, diatomaceous earth

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Last update on 2024-06-21 / Affiliate links / Images from Amazon Product Advertising API


Protecting your mums from pests involves regular inspection, proper care, and timely intervention. By understanding the common pests that can affect your mums and knowing how to manage them, you can keep your garden vibrant and healthy. Whether you prefer organic methods or need to resort to chemical treatments, these tips will help you maintain the beauty of your mums.

Frequently Asked Questions

How can I naturally deter pests from my mums?

You can naturally deter pests by encouraging beneficial insects like ladybugs and lacewings, using companion planting with herbs like basil and mint, and maintaining healthy plants through proper watering and fertilization.

Are there any home remedies for treating pests on mums?

Yes, you can use a mixture of water and dish soap (a few drops of soap per gallon of water) to spray on the affected plants. This can help control soft-bodied pests like aphids and spider mites.

How do I prevent slugs and snails from eating my mums?

To prevent slugs and snails, you can use barriers like copper tape around the base of the plants, apply diatomaceous earth to the soil, and hand-pick them during the evening. Iron phosphate baits are also effective and safe for pets and wildlife.

What should I do if chemical treatments are not effective?

If chemical treatments are not effective, consider integrating multiple pest management strategies such as improving plant health, using beneficial insects, and employing physical barriers. Rotate the use of different chemical treatments to prevent pest resistance.

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