Large Milkweed Bug
MODERATEOncopeltus fasciatus
Overview
Cluster of black and orange insects on milkweed plant. Warm, near sunset, slightly overcast.
- Type
- Insect
- Severity
- MODERATE
- Source
- iNaturalist
Symptoms
Geographic Spread
Treatments
Targeted Insecticide Application
Apply appropriate insecticide following label directions. Timing is critical — treat during the vulnerable larval or adult emergence stage for maximum effectiveness.
Biological Control Agents
Introduce or encourage natural predators and parasitoids. Options include releasing predatory beetles, parasitic wasps, or applying Bt (Bacillus thuringiensis) for caterpillar pests.
Infested Material Removal
Prune and destroy infested branches and plant material. Remove fallen debris that may harbor eggs or larvae. Dispose of material away from healthy trees.
Recommended Products & Tools
Helpful supplies for managing Large Milkweed Bug. Always read and follow label directions, and confirm a diagnosis before treating.
Knocks down soft-bodied pests like aphids, mites, and scale crawlers.
Smothers overwintering eggs and crawlers; dormant or summer rates.
Soil-applied protection taken up by the tree for season-long control.
Sharp, clean cuts to remove affected wood — a tree-care essential.
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Frequently Asked Questions
What is Large Milkweed Bug?
Cluster of black and orange insects on milkweed plant. Warm, near sunset, slightly overcast.
What are the symptoms of Large Milkweed Bug?
Where is Large Milkweed Bug currently found?
Large Milkweed Bug is currently active in California, Virginia, Illinois, Indiana, Ohio, New York, North Carolina, Michigan, Georgia, Pennsylvania, Iowa, Minnesota, Tennessee, Texas, Kansas, Missouri, Connecticut, Maryland, Kentucky, Arizona, Oklahoma, Nebraska, Delaware, New Jersey, Colorado, New Mexico, Arkansas, Alabama, Mississippi, Massachusetts, North Dakota, Maine, South Dakota, South Carolina, Louisiana. It has been reported in 35 total states across the United States.
How do I treat Large Milkweed Bug?
Treatment options for Large Milkweed Bug include: Targeted Insecticide Application, Biological Control Agents, Infested Material Removal. Treatment approaches may include chemical, biological, cultural, and mechanical methods depending on the severity and context.