Project ID

2001-33

Abstract

Iowa State University has reared and released two European leaf-feeding beetle species to control purple loosestrife in Iowa wetlands. Expected reductions in loosestrife have not occurred, and biotic mortality factors may explain the failure of the beetles to curb the loosestrife.

Key Question

Purple loosestrife is an invasive weed that impairs wetland functioning and biocontrol methods using beetles didn't seem to reduce the problem?

Findings

The research shows that the beetle eggs are probably eaten by other predators and they might survive better in more diverse wetlands.

Principal Investigator(s)

John Obrycki

Year of Grant Completion

2005

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