11.   European Union subsidies in recent years have encouraged growers in the Languedoc region of southern France to pull out their old vines and plant better varieties.

12.   It requires signatory countries to provide patents on micro-organisms and intellectual property protection for plant varieties.

13.   Most important, choose plant varieties resistant to disease and pests.

14.   Ms. Stamm restocks them yearly with one or another of her favorite plant varieties, which are all structured, long lasting and suited to shady growing conditions.

15.   The book describes how the number of livestock breeds in commercial use is decreasing, like the number of plant varieties.

16.   These are just a few of the hundreds of plant varieties offered by Seeds of Change, a seed company that specializes in uncommon vegetables, herbs and flowers.

17.   They have also been given for many years for plant varieties developed by breeders.

18.   Today, the centers hold more than half a million plant varieties.

19.   Vigorous plant varieties with a lot of foliage that shades fruit can also produce blotchy tomatoes.