Fall Webworm vs Tent Caterpillar: Identifying and Controlling These Pests
Fall Webworm vs Tent Caterpillar: Identifying and Controlling These Pests
Fall webworm and tent caterpillar are two common pests that can damage trees and shrubs. Both insects build webs, but there are some key differences between them.
Identifying Fall Webworm vs Tent Caterpillar
| Characteristic | Fall Webworm | Tent Caterpillar |
|---|---|---|
| Webs | Loose, white or gray webs that cover leaves | Silken, tent-like webs that enclose branches |
| Larvae | Hairy, black caterpillars with a white stripe down the back | Smooth, brown or black caterpillars with a row of blue spots down the sides |
| Damage | Feed on leaves, causing them to turn brown and fall off | Feed on buds and young leaves, causing trees to defoliate |
Controlling Fall Webworm vs Tent Caterpillar
Fall Webworm
- Benefits:
- Removing webs and egg sacs can help reduce the number of caterpillars that hatch.
- Applying insecticidal soap or neem oil can kill caterpillars.
- Introducing natural predators, such as birds or parasitic wasps, can help control populations.
- How to Do:
- Remove webs and egg sacs by hand.
- Spray trees with insecticidal soap or neem oil.
- Encourage natural predators by planting native plants that provide food and habitat.
Tent Caterpillar
- Benefits:
- Removing tents and egg masses can help reduce the number of caterpillars that hatch.
- Applying insecticidal soap or Bacillus thuringiensis (Bt) can kill caterpillars.
- Using pheromone traps can disrupt mating and reduce populations.
- How to Do:
- Remove tents and egg masses by hand.
- Spray trees with insecticidal soap or Bt.
- Place pheromone traps in areas where tent caterpillars are known to occur.
Common Mistakes to Avoid:
- Using chemical insecticides too early. Chemical insecticides can kill beneficial insects that help control fall webworm and tent caterpillar populations.
- Applying insecticides too late. Insecticides are most effective when applied to young caterpillars.
- Not following label directions. Always read and follow the label directions when using any pesticide.
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