. . . . . . . . . . . . . . "Restoring the balance biological control of purple loosestrife" . "During the past decade, scientists have studied the complex relationships between purple loosestrife and specialized insects that attack this plant. Biological weed control reunites an invasive plant with natural enemies from its native range, providing a natural balance between the plant, the insects, and the wetland environment."@en . "Restoring the balance biological control of purple loosestrife"@en . "Biological control of purple loosestrife" . "Biological control of purple loosestrife"@en . . . . . . . .