Loosestrife seed weevil. Females each produce 60 to 100 eggs.
Infested buds fail to open and prematurely drop from the plant.
Only one larva is found per bud. The adults move to the spike and feed on flower buds when they begin to form. Adult and larval. Flower buds which are fed upon by either adults or larvae usually abort and fail to produce seeds. Sites without prolonged flooding are favored for beetle development.