One, sometimes up to three eggs, 0.6 mm long, are laid in a toadflax flower bud. Feeds in the flower buds and flowers on pollen, anthers. Older larvae may eat the developing seeds. The larvae move between flowers with more flowers destroyed on toadflax species with small than those with large flowers. Yellow, about 2.8 mm long and 2.0 mm wide and formed in the soil near the host.
Beetles then transfer to toadflax pollen.
They also obtain sap from tender shoots which stimulates the production of many small branches so the plant becomes bushy. In Newfoundland adults are common until early September. Widely distributed in Europe. There are many records of adult feeding on pollen of Galium , Spiraea , dandelion, strawberry, wild mustard, dogwood and other plants. This occurs prior to toadflax bloom and does not reduce seed or fruit set 2 .