31.   It was a major food crop for the Aztecs and was used for cleansing, wound dressing and body painting.

32.   Leaders of many developing countries have expressed support for research to create more nutritious and disease-resistant strains of staple food crops such as rice.

33.   Like any food crop, the market value each year can fluctuate due to weather and to yields from other U.S. onion-producing areas.

34.   Loren Wassell, a spokesman for Monsanto, said genetically modified food crops are subjected to unprecedented regulatory scrutiny before they are released.

35.   Meanwhile, farmers have planted fewer acres to a second key food crop, winter wheat.

36.   Morning glory vines, introduced to soak up carbon dioxide, exploded in number and overran other plants, including food crops.

37.   Not only could livestock be killed, but critical food crops also could be damaged, and the economic loss could be stunning, they said.

38.   Opponents claim that the spraying damages food crops and human health.

39.   One control product labeled for use against powdery mildew on food crops is Remedy, based on a bicarbonate formulation.

40.   Scientists also are checking for contamination of other food crops and water supplies.