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Diaporthe phaseolorum var. sojae is a plant pathogen infecting soybean [1] and peanut. Diaporthe phaseolorum var. sojae is the perfect form of the causal pathogen of pod and stem blight of soybean. [2] It is a fungal ascomycete that commonly infects seeds, pods, stems, and petioles. This pathogen is also found in its imperfect state, Phomopsis ...
Soybeans are grown all over the world and are a primary source of vegetable oil and protein. [1] Approximately 40% of the world's supply of vegetable oil comes from soybeans. [1] Therefore, it is important to guarantee a successful soybean crop every growing season. Bacterial blight can be found in most soybean fields every year in the Midwest. [2]
Viral diseases; Alfalfa mosaic genus Alfamovirus, Alfalfa mosaic virus (AMV) [citation needed] Bean pod mottle genus Comovirus, Bean pod mottle virus (BPMV) Bean yellow mosaic genus Potyvirus, Bean yellow mosaic virus (BYMV) Brazilian bud blight genus Ilarvirus, Tobacco streak virus (TSV) Cowpea chlorotic mottle
Pod and stem blight attack soybean plants during very wet seasons. It is caused by a number of species of the fungal genera Diaporthe and Phomopsis. They cause small black fruiting bodies to form on plant stems and pods. [149] These fungi cause moldy, cracked, and shriveled seeds which in return produce low-quality oil and meal. [148]
Ascochyta pisi also infects 20 genera of plants and more than 50 plant species including soybean, sweet pea, lentil, alfalfa, common bean, clover, black-eyed-pea, and broad bean. [ 2 ] Field pea is an annual, cool season legume that is native to northwest and southwest Asia.
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.
Symptoms appear as dark red to black lesions on the lower surface of the leaves. They appear as sunken lesions surrounded by a raised brown-black border on the pods, petioles and stems. Very small black fruiting bodies of the fungus are usually visible in older lesions. [3] Other symptoms include shedding of leaves, flower and pod abortion. [3]
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.