11.   He said the finding was a harsh lesson, particularly for those who had pinned their careers on biological control as a green alternative to chemical pesticides.

12.   It grows best in barren, high-altitude terrain and is almost always grown without chemical pesticides or fertilizers.

13.   Loss of these species could increase the demand for, and use of, chemical pesticides.

14.   Not a drop of chemical pesticide or fertilizer is used here.

15.   Proponents of genetic engineering claim this will reduce the currently widespread application of chemical pesticides, thus yielding an environmental boon.

16.   The cover crops also provide a home for friendly bugs, which in turn eat crop-destroying pests and reduce the need for chemical pesticides.

17.   The wines, chosen to complement the food, reflected how far the wine industry has come in growing grapes without using chemical pesticides.

18.   This corporate farming style is typified by the use of large machines, chemical pesticides and fertilizers, and hybrid seeds that must be purchased each year.

19.   This powerful and popular strategy known as biological control has long been touted as the green alternative to chemical pesticides.

20.   With all these biological controls, there is no reason for the home gardener to use chemical pesticides.