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The Asian soybean rust is a polycyclic disease: within the disease cycle, the asexual urediniospores keep infecting the same plant. Teliospores (sexual spores) are the survival spores that overwinter in the soil. Basidiospores are the spores that are able to contaminate an alternative host. The urediniospores need a minimum of six hours to ...
Soybean rust is a disease that affects soybeans and other legumes. It is caused by two types of fungi, Phakopsora pachyrhizi, commonly known as Asian soybean rust, and Phakopsora meibomiae, commonly known as New World soybean rust. P. meibomiae is the weaker pathogen of the two and generally does not cause widespread problems.
Cercospora kikuchii is a fungal plant pathogen that affects soybeans. [1] It results in both the Cercospora leaf blight and purple seed stain diseases on soybean and is found almost worldwide. C. kikuchii produces the toxin cercosporin, as do a number of other Cercospora species.
Soybean cyst nematode Heterodera glycines. Spiral nematode Helicotylenchus spp. Sting nematode Belonolainus gracilis Belonolaimus longicaudatus. Stubby root nematode Paratrichodorus minor. Stunt nematode Quinisulcius acutus Tylenchorhynchus spp.
Cercospora sojina is a fungal plant pathogen which causes frogeye leaf spot of soybeans. Frog eye leaf spot is a major disease on soybeans in the southern U.S. and has recently started to expand into the northern U.S. where soybeans are grown. The disease is also found in other soybean production areas of the world.
The fungus is known as a pathogen of many agricultural crop plants, especially cowpea, cucumber, papaya, rubber, soybean, and tomato. It has caused crop failures resulting in high economic losses in over 70 countries, [ 1 ] including losses of over US$3000 per acre in tomato crops in Florida in the United States. [ 2 ]
Phialophora gregata is a Deuteromycete [1] fungus that is a plant pathogen which causes the disease commonly known as brown stem rot of soybean. P. gregata does not produce survival structures, but has the ability to overwinter as mycelium in decaying soybean residue.
Neocosmospora vasinfecta is a fungal plant pathogen that causes, among other types of infections, soybean stem rot. [1] [2] Varieties