PestMedium Severity

Lepidoptera (Moths and Butterflies)

Order Lepidoptera

An order of insects including moths and butterflies with over 180,000 described species. While many are beneficial pollinators, some species can cause serious damage to trees by feeding on bark, leaves, and stems during their larval (caterpillar) stage.

Peak Season: Activity varies by species. Many overwinter in various life stages with peak adult activity during spring and summer months.
Lepidoptera insects showing various moths and caterpillars affecting trees

Identification & Symptoms

What to Look For

Larval feeding damage on leaves, bark, and stems
Defoliation from caterpillar feeding
Bark damage from boring species
Webbing or silk tents from gregarious species
Skeletonized leaves from leaf-feeding species
Wilting or dieback from severe feeding damage

Potential Damage

Defoliation reducing photosynthetic capacity
Bark damage from boring larvae
Structural damage to stems and branches
Aesthetic damage from feeding and webbing
Tree stress and potential mortality in severe infestations
Economic losses in managed forests and landscapes

Lifecycle

Complete metamorphosis (holometabolous) including egg, larval (caterpillar), pupal (chrysalis/cocoon), and adult stages. Adults mate and lay eggs near or on host plants. Caterpillars go through multiple instars before pupating. Some species overwinter as eggs, larvae, pupae, or adults depending on species.

Professional Treatment Approach

1

Apply Imicide during early larval stages for best control

2

Use Imisol for systemic protection during egg-laying periods

3

Remove and destroy egg masses when visible

4

Monitor for early signs of caterpillar activity

5

Maintain tree health with Arborfos to enhance resistance

6

Biological controls may be effective for some species

Recommended Mauget Products

Imicide

Professional-grade treatment specifically effective against lepidoptera (moths and butterflies).

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Imisol

Professional-grade treatment specifically effective against lepidoptera (moths and butterflies).

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Arborfos

Professional-grade treatment specifically effective against lepidoptera (moths and butterflies).

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Need Professional Diagnosis?

Our certified arborists can help you accurately identify tree problems and develop an effective treatment plan using Mauget's proven injection systems.