excretes

While slurping, the insect excretes a substance that weakens the tree's defenses and causes damage that impedes the flow of nutrients between root and crown, he said.

They discovered N. intermedia produces and excretes many enzymes as it grows.

The snail excretes a juvenile form of the worm, which then has 24 hours to find a mammal host to infect or die, according to Dillman.

It then excretes a sticky, sugary waste called honeydew that attracts insects and a form of sooty mold that can finish off the already weakened plants, posing a danger to crops and native trees.

She added that researchers have yet to find a species that, when infected, excretes much live virus in its feces.