Herbicide was to be sprayed on cane along 1.1-mile stretch of river . Tall , thick Carrizo cane provides cover for illegal immigrants , Border Patrol says . Hispanic communities near Laredo , Texas , file suit to stop spraying . One option could involve the import of tiny Arundo wasps , which feed on the cane and lay eggs in it , stunting the cane 's growth . Comment:
Herbicide was to be sprayed on cane along 1.1-mile stretch of river . Tall , thick Carrizo cane provides cover for illegal immigrants , Border Patrol says . Hispanic communities near Laredo , Texas , file suit to stop spraying . Comment: