Rust (fungus) of the rust fungi "Cronartium ribicola", preventing the formation of basidiospores which infect the primary host. Although spores from white pines cannot infect other white pines, survival spores may overwinter on infected pines and reinfect "Ribes" spp. the following season. Infected tissue is removed from white pines and strict quarantines of "Ribes" spp. are maintained in high risk areas. "Puccinia graminis" is a macrocyclic heteroecious fungus that causes wheat stem rust disease. The repeating stage in this fungus occurs on wheat and not the alternate host, barberry. The repeating stage allows the disease to persist in wheat even though the
Rust Craft Greeting Card Company Rust Craft Greeting Card Company The Rust Craft Greeting Card Company was an American greeting card, printing company and owner of television stations. It produced what is believed to be the first Christmas card. The company was founded in a bookstore in Kansas City, Missouri, in 1906 by its owner, Fred Winslow Rust. The first Christmas card was printed on heavy tan paper and included a brief message in two colors. The success of the Christmas card grew into a business letters, postcards, and greeting cards with envelopes. Rust revolutionized the use of the "French Fold," which turned a single