1 E. cuniculi are carried in the blood to other parts of the body, particularly neural tissue. 2  Spores from infected urine can remain in the environment for a month. 3  The parasites can infect and be shed by many other animals but seldom cause clinical disease in other animals.
Most annual flowers will die when fall brings frost. Marigolds, zinnias, petunias, delphinium and many other common flowering plants are examples of plants that frost will kill. In more northerly climate zones, it's difficult to get anything to bloom in the harsh winter months.
In fact, they may attract harmful pests damaging not only the marigolds but also your vegetables. While marigolds are rumored to deter certain beetles, they are more widely known for their effects on nematode populations in the soil. Nematodes are microscopic worm-like organisms that destroy the root systems of plants.