Choosing the right plants, finding problems early and treating when the pest is most vulnerable can reduce both chemical use and damage.

This result occurs when chemical use is excessive or poorly timed with respect to high precipitation.

ARMS also provides data regarding chemical use on field crops required under environmental and food safety legislation.

She said she believes in trying to minimize chemical use to maintain healthy land and food.

The bill has been sought by breast-cancer organizations as a way to investigate possible links between chemical use and cancer.

But Dr. Sakharov, said medical experts had found no firm evidence of other chemical use.

"There are ways to control chemical use, ways to collect runoff," he said.

The Pentagon argues that the new weapons are needed to deter chemical use by other states.

Agricultural plowing and chemical use may be a factor.

He said Intel was a good corporate citizen, was open about its environmental practices, had reduced chemical use and listed the chemicals it used.