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Transplanting arborvitae can breathe new life into your landscape, but it also introduces the risk of pest infestations. Being aware of common pests that target these evergreens after transplantation can help you take timely action to protect your plants. Here are the top five pests to watch for.
1. Bagworms
Bagworms are caterpillars that create protective silk and plant material bags around themselves. They feed on arborvitae foliage, causing defoliation and weakening the plant. Signs include silken bags hanging from branches and sparse foliage.
2. Spider Mites
Spider mites are tiny arachnids that thrive in dry conditions. They puncture plant cells to feed, resulting in stippled, bronzed foliage. You might notice fine webbing on the undersides of leaves and a general decline in plant vigor.
3. Arborvitae Leafminer
The arborvitae leafminer is a small moth whose larvae tunnel into new growth, causing distorted and discolored foliage. Infested branches may appear scorched or dead, and you might see tiny larvae inside the needles.
4. Aphids
Aphids are soft-bodied insects that cluster on new growth, feeding on sap. They excrete sticky honeydew, which can lead to sooty mold. Look for curled or yellowing needles and a sticky residue on leaves.
5. Scale Insects
Scale insects attach themselves firmly to the stems and branches of arborvitae. They suck plant juices, causing yellowing, wilting, and branch dieback. You’ll notice small, shell-like bumps on the plant surface.
Monitoring and Prevention Tips
- Regularly inspect your arborvitae for early signs of pests.
- Maintain proper watering and fertilization to strengthen plant health.
- Prune infested branches promptly to reduce pest populations.
- Use appropriate insecticidal treatments when necessary, following label instructions.
- Encourage natural predators like ladybugs and predatory mites.
Early detection and integrated pest management can help ensure your transplanted arborvitae remains healthy and vibrant. Keep a close eye on your plants, especially during the first growing season after transplantation.