by George R.R. Martin and Gardner Dozois
Read an excerpt:
...adly fog rose in a great cloud from between his shoulders, cloaking him, choking him, making his eyes burn and blur. He felt for the hose, and his hand came away covered with dying sandkings. The hose was severed; they'd eaten it through. He was surrounded by a shroud of pesticide, blinded. He stumbled and screamed and began to run back to the house, pulling sandkings from his body as he went. Inside, he sealed the door and collapsed on the carpet, rolling back and forth until he was sure he had crushed them all. The canister was empty by then, hissing feebly. Kress stripped off his skinthins and showered. The hot spray scalded him and left his skin reddened and sensitive, but it made his flesh stop crawling. He dressed in his heaviest clothing, thick work plans and leathers...