Black-margined Loosestrife Beetle Eggs - Neogalerucella calmariensis
The eggs are spherical, white, and topped with frass.
The larvae and adults of this species only feed on purple loosestrife (Lythrum salicaria), which is invasive. The beetles have been introduced in North America as a biological control agent for purple loosestrife.
I found eggs, larvae, and adults on purple loosestrife in a rural garden.
''Neogalerucella calmariensis'' is a species in the family Chrysomelidae , in the order Coleoptera . The species is known generally as the "black-margined loosestrife beetle".
The distribution range of ''Neogalerucella calmariensis'' includes Europe & Northern Asia and North America.