If you see these hanging from you tree, you need to know what it means


These insects are not worms, but actually caterpillars of a moth, and can harm both deciduous and evergreen trees, potentially causing severe damage or death if left untreated.

Evergreen Bagworms, scientifically named Thyridopteryx ephemeraeformis, create a distinctive protective casing resembling a bag.

The worms make these bags by making a thread that is similar to silk. They then use this thread to stick things like twigs and leaves to their bodies. As time passes, the bags get larger, giving the worms a hiding place and protection.

How does an Evergreen Bagworm go through its lifecycle?

The adult female starts the reproduction process by depositing eggs in her casing, which remains on the tree even after her death. The eggs stay in the casing over winter and hatch in late spring or early summer, producing small larvae. These larvae then create their own bags using silk-like thread and search for a suitable tree to attach to.

The bags start small but get bigger as the larvae grow and sometimes come out to collect more plant material. New bags are made as the larvae progress.

The larvae change into adult moths within a span of two weeks, after which the tiny males fly away in search of females to reproduce with.

Evergreen Bagworm treatment

Bagworms that are evergreen may seem harmless, but they can actually cause significant damage to trees by feeding on the leaves and blocking nutrient absorption. This weakens the tree and makes it more susceptible to other diseases, potentially leading to its demise.

What can you do to keep your trees healthy and prevent damage from Evergreen Bagworms? You have a few choices, including:

  1. Manually removing the bagworms by hand;
  2. Pruning the affected branches;
  3. Encouraging natural predators like birds and parasitic wasps in your garden; and
  4. Chemically controlling the infestation by using insecticides specifically formulated for bagworms.

Prevent Evergreen Bagworm infestation by implementing methods such as:

  1. Regularly inspecting trees, especially during spring and summer when the larvae hatch, to detect bagworms early on;
  2. Maintaining trees by pruning and ensuring they’re receiving proper nutrients;
  3. Removing bagworms;
  4. Maintaining proper spacing between trees to reduce the risk of bagworm infestation; and
  5. Monitor neighboring trees and plants, especially because bagworms can migrate from one tree to another.

Remember: Evergreen Bagworms may not seem harmful, but they can cause significant damage. Stay vigilant and regularly inspect your trees and plants to prevent any harm.

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