In severe infestations, the mines of individuals can merge and almost the entire leaf area may be utilised.

Gangrene is another common complication of severe infestation and superinfection.

Due to each bite taking a tiny amount of blood, chronic or severe infestation may lead to anemia.

In some cases with severe infestation, the sudden death of the worms may cause bowel obstruction, requiring surgical intervention.

In very severe infestations, I have to repeat the process a second time.

But severe infestations or obvious damage on otherwise healthy trees are not common.

During a severe infestation, though, there may be adverse effects on the host, such as demodicosis.

During one of Sunnydale's hottest summer, the town is suffering from a severe infestation of insects anyone.

A severe infestation can kill the entire plant.

The most severe infestation is in the Northeast, although the moths have been found as far away as Oregon.