"What kind of object is ""tansy""?"
Tansy beetle from plant to plant. 1,8-cineole is a toxin believed to defend the plant leaves against attacks by herbivores. The tansy beetle is resistant to these chemicals. However, tansy is a repellent to other Chrysomelid beetles. For example, the steam distillate of fresh leaves and flowers of tansy contains high levels of camphor and umbellulone and is strongly repellent to the Colorado potato beetle ("Leptinotarsa decemlineata"). Beetle remains bearing what appeared to be the marks of bird attacks have been found by the River Ouse and hardened adults often bear symmetrically indented elytra, interpreted as 'pinch marks' inflicted by a beak
Tansy leaves to repel insects and delay spoilage. Tansy was frequently worn at that time in shoes to prevent malaria and other fevers; it has been shown, however, that some mosquito species, including "Culex pipiens", take nectar from tansy flowers. Tansy can be used as in companion planting and for biological pest control. It is planted alongside potatoes to repel the Colorado potato beetle, with one study finding tansy reduced the beetle population by 60 to 100%. In England tansy is placed on window sills to repel flies; sprigs are placed in bed linen to drive away pests, and it has