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Most Common Century Plant Pests:
Identification and Treatment Guide

Updated: November 19, 2022

Century plants, commonly known as agave, are a favorite among gardeners due to their unique appearance and low maintenance. These plants are originally from hot, dry regions of the Americas and have adapted to survive in harsh conditions. However, even the toughest plants can fall prey to pests. In this article, we’ll take a look at some of the most common pests that can affect century plants and how to identify and treat them.

Mealybugs

Mealybugs are one of the most common pests that affect century plants. They appear as small, white, cottony masses on the leaves or stem of the plant. These insects feed by sucking sap from the plant, which can lead to stunted growth, yellowing leaves, and eventually death.

Treatment: To treat mealybugs, use a cotton swab dipped in rubbing alcohol to remove them manually. You can also spray the plant with insecticidal soap or neem oil. Be sure to follow the instructions on the product label.

Spider Mites

Spider mites are tiny pests that are difficult to see with the naked eye. They are usually found on the underside of leaves and spin fine webs over the plant. Spider mites feed on plant sap, causing leaves to turn yellow and eventually fall off.

Treatment: To treat spider mites, you can use insecticidal soap, neem oil or a mixture of water and dish soap. You can also increase humidity around the plant by misting it regularly.

Agave Snout Weevil

The agave snout weevil is a type of beetle that feeds on the core of century plants. The adult weevils lay their eggs in the core of the plant, and the larvae feed on it until they mature into adult beetles. Infected plants will show signs of wilting, yellowing or browning leaves, and eventual death.

Treatment: Unfortunately, once a plant is infected with the agave snout weevil, it is difficult to save. The best course of action is to remove and destroy the infected plant to prevent the spread of the pest. To prevent future infestations, inspect new plants for signs of weevils before introducing them to your garden.

Scale Insects

Scale insects are small, oval-shaped pests that feed on the sap of the plant. They attach themselves to the leaves or stem and create a hard, protective shell over their bodies.

Treatment: To treat scale insects, use a cotton swab dipped in rubbing alcohol to remove them manually. You can also spray the plant with insecticidal soap or neem oil. Be sure to follow the instructions on the product label.

Leafhoppers

Leafhoppers are small, winged insects that feed on the sap of the plant. They are usually found on the underside of leaves and can cause yellowing or browning of leaves.

Treatment: To treat leafhoppers, you can use insecticidal soap or neem oil. You can also increase humidity around the plant by misting it regularly.

FAQ

How can I prevent pests from affecting my century plants?

The best way to prevent pests from affecting your century plants is to keep them healthy. Make sure they are planted in well-draining soil and receive enough sunlight and water. Also, regularly inspect your plants for signs of pests and remove any infected parts immediately.

Can I use chemical pesticides on my century plants?

While chemical pesticides may be effective in treating pests, they can harm beneficial insects and pollinators. It’s best to use natural remedies like insecticidal soap or neem oil. If you do use a chemical pesticide, make sure it is labeled safe for use on century plants and follow the instructions carefully.