Pathogen—Fir broom rust is caused by the fungus Melampsorella caryo-phyllacearum. Spruce broom rust is caused by the fungus Chrysomyxa arctostaphyli. Hosts—Many true fir species …

Broom rust on a fir near Baker City, OR. Dave Shaw. Cause The fungus Melampsorella caryophyllacearum causes large brooms on true firs (Abies sp) including A. concolor (white …

Fir broom rust gets its name from the proliferation of shoots on affected fir stem ends, which leads to broom-like growths. These growths may occur randomly anywhere on the tree but are most …

Fir broom rust is caused by the fungus Melampsorella elatina. This rust species causes perennial infections in both true firs (Abies) and in an alternate host, chickweed (Cerastium) and its …

The rust induces juvenile needles to form which are sharp pointed needles in contrast to the smooth rounded mature needles found on the other areas of the tree.

2013年10月4日 · Fir Broom rust is becoming more common in New York as the number of fir tree plantings increase. This disease produces a proliferation of shoots “witches brooms” that can …

Fir Broom Rust

Over the past few years fir broom rust has become a problem for some Christmas tree growers in Upstate New York. As the acreages of Fraser and other firs increase we are likely to see more …

Rusts cause cankers (dis-eases of the bark), galls, brooms, foliage diseases, and/or cone diseases. The majority of the rust diseases in this Region are native pathogens, with the …

Over the past few years fir broom rust has become a problem for some Christmas tree growers in Upstate New York. As the acreages of Fraser and other firs increase we are likely to see more …