Seeds of Striga asiatica and S. hermonthica were separated from soil using a wet sieve method with a 2.5 smallcap˜M sucrose flotation solution and 250- and 150-µm mesh screens. In 34 fields, the av. and range of seeds/100 g of soil were 8.2 and 0-75, resp. Seeds were recovered from 28 of the 34 f...
Soybean rust, caused by Phakopsora pachyrhizi, is one of the most important constraints to soybean production worldwide. The absence of high levels of host resistance to the pathogen has necessitated the continued search and identification of sources of resistance. In one set of experiments, 178 ...
Twizeyimana, M.
,
Ojiambo, P.S.
,
Ikotun, T.
,
Ladipo, J.L.
,
Hartman, G.L.
,
Bandyopadhyay, Ranajit
,
[Evaluation of soybean germplasm for resistance to soybean rust (Phakopsora pachyrhizi) in Nigeria]
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Evaluation of soybean germplasm for resistance to soybean rust (Phakopsora pachyrhizi) in Nigeria
Fourteen soybean accessions and breeding lines were evaluated for resistance to soybean rust caused by the fungus Phakopsora pachyrhizi. Evaluations were conducted in replicated experiments in growth chambers using detached leaves and under greenhouse and field conditions. In growth-chamber exper...
Twizeyimana, M.
,
Ojiambo, P.S.
,
Ikotun, T.
,
Paul, C.
,
Hartman, G.L.
,
Bandyopadhyay, Ranajit
,
[Comparison of field, greenhouse and detachedleaf evaluations of soybean germplasm for resistance to Phakopsora pachyrhizi]
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Comparison of field, greenhouse and detachedleaf evaluations of soybean germplasm for resistance to Phakopsora pachyrhizi
Simple sequence repeat (SSR) markers were used to classify 116 isolates of Phakopsora pachyrhizi, the cause of soyabean rust, collected from infected soyabean leaves in four agroecological zones in Nigeria. A high degree of genetic variation was observed within the sampled populations of P. pachy...
Sclerotinia sclerotiorum causes a devastating disease on soybean (Sclerotinia stem rot) and attacks over 500 other hosts (Grau and Hartman 2015). In October 2018, research plots at Jimma Agricultural Research Center, Ethiopia, were evaluated for soybean diseases. A sample of 100 randomly selected...
Pawlowski, M.L.
,
Murithi, H.
,
Hailemariam, M.
,
Abebe, A.T.
,
Hartman, G.L.
,
[First report of Sclerotinia sclerotiorum causing stem rot on soybean (Glycine max) in Ethiopia]
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First report of Sclerotinia sclerotiorum causing stem rot on soybean (Glycine max) in Ethiopia
Twizeyimana, M.
,
Ojiambo, P.S.
,
Bandyopadhyay, Ranajit
,
Hartman, G.L.
,
[Use of quantitative traits to assess aggressiveness of Phakopsora pachyrhizi isolates from Nigeria and the United States]
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Use of quantitative traits to assess aggressiveness of Phakopsora pachyrhizi isolates from Nigeria and the United States
Murithi, H.
,
Owati, A.
,
Kumar, P.L.
,
Mahuku, George S.
,
Joosten, M.H.
,
Beed, Fen D.
,
Madata, C.S.
,
Haudenshield, J.
,
Hartman, G.L.
,
[Soybean rust (Phakopsora pachyrhizi) and witches broom (16Srill Candidatus phytoplasma): the two emerging and devastating diseases of soybean in Tanzania]
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Soybean rust (Phakopsora pachyrhizi) and witches broom (16Srill Candidatus phytoplasma): the two emerging and devastating diseases of soybean in Tanzania
Murithi, H.
,
Beed, Fen D.
,
Madata, C.S.
,
Haudenshield, J.S.
,
Hartman, G.L.
,
[First report of Phakopsora pachyrhizi on soybean causing rust in Tanzania]
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First report of Phakopsora pachyrhizi on soybean causing rust in Tanzania
Soybean rust, caused by Phakopsora pachyrhizi, is an important disease in Nigeria and many other soybean-producing countries world-wide. To determine the geographical distribution of soybean rust in Nigeria, soybean fields were surveyed in the Derived Savanna (...
Soybean rust, caused by Phakopsora pachyrhizi Syd., is a major disease limiting soybean [Glycine max (L.) Merr.] production in many areas of the world. Yield losses of up to 80% have been reported in experimental plots in Taiwan. Although the disease is not always yield limiting, it has the poten...
Hartman, G.L.
,
Hill, C.B.
,
Twizeyimana, M.
,
Miles, M.R.
,
Bandyopadhyay, Ranajit
,
[Interaction of soybean and Phakopsora pachyrhizi, the cause of soybean rust]
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Interaction of soybean and Phakopsora pachyrhizi, the cause of soybean rust