The body mass of fifth-stage caterpillars has increased about 2,000-fold from first stage instars. Larvae must eat constantly to ingest enough milkweed to increase in mass so dramatically within a few ...

The questions include: What portion of each native milkweed from last year germinated, and of those that germinated, how many survived last winter and resprouted this spring? How many gardeners ...

from the egg stage through adulthood, can survive exposure to the chemicals. Milkweed tolerance has its price, though. Monarch flies became temporarily paralyzed when the vial they were contained ...

RIO GRANDE CITY, Texas— The U.S. Fish and Wildlife Service today protected the prostrate milkweed as endangered. Only 24 populations of the plant survive, in south Texas and northern Mexico, where ...

The exhibit offers information about the different types of milkweed, shows the life stages and migration of the monarch from early summer, late summer, fall and spring. The Iowa Association of ...