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Rust fungi are obligate plant pathogens that only infect living plants. Infections begin when a spore lands on the plant surface, germinates, and invades its host. Infection is limited to plant parts such as leaves, petioles, tender shoots, stem, fruits, etc. [3] Plants with severe rust infection may appear stunted, chlorotic (yellowed), or may
The main ways in which myrtle rust can be spread are by: the movement of infected plant material, the movement of contaminated equipment, wind, water and gravity, animals, humans and/or vehicles. [15] Myrtle rust may remain on a single host plant to complete its life cycle, which can be as short as 10–14 days. [5]
Infections can lead up to 20% yield loss. The pathogen is a Puccinia rust fungus. It is the most prevalent of all the wheat rust diseases, occurring in most wheat-growing regions. [1] It causes serious epidemics in North America, Mexico and South America and is a devastating seasonal disease in India.
Rust diseases are among the most destructive plant diseases, known to cause famine following destruction of grains, vegetables, and legumes. [5] [6] Asparagus rust occurs wherever the plant is grown and attacks asparagus plants during and after the cutting season. Asparagus spears are usually harvested before extensive rust symptoms appear. [7]
The disease cycle of Puccinia schedonardii does not vary from other rust disease cycles. This pathogen is heteroecious and exhibits a polycyclic disease cycle. Puccinia schedonnardii overwinters as teliospores that are produced in telia on the alternate host. In the spring, the teliospores germinate to produce basidiospores.
The stem rust fungus attacks the parts of the plant that are above ground. Spores that land on green wheat plants form a pustule that invades the outer layers of the stalk. [7] Infected plants produce fewer tillers and set fewer seed, and in cases of severe infection the plant may die. Infection can reduce what is an apparently healthy crop ...
Albugo candida, commonly known as white rust or white blister rust, is an obligate plant pathogen in the family Albuginaceae that infects Brassicaceae species. [2] (Although called a "rust" and a fungus, it is an oomycete.) It has a relatively smaller genome than other oomycetes. [3]
Spruce broom rust or yellow witches' broom rust is a fungal plant disease caused by the basidiomycete fungus known as Chrysomyxa arctostaphyli.It occurs exclusively in North America, with the most concentrated outbreaks occurring in northern Arizona and southern Colorado on blue and Engelmann spruce, as well as in Alaska on black and white spruce. [2]