Red Leaf Blotch of Soybeans

Hartman, G. L.; Datnoff, L. E.; Levy, C.; Sinclair, J. B.; Cole, Desirée L.; Javaheri, F.

doi:10.1094/pd-71-0113

Cited by 20 publications

(12 citation statements)

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“…These results are consistent with those of Marcellos et al (1995), Rashid & Bernier (1991) and Yeoman et al (1987) who reported that yield loss in faba bean infected with U. viciae-fabae was due mainly to reduced seed mass. In addition, a foliar disease such as brown spot (Septoria glycines) has been shown to cause yield loss in soybean in a similar manner (Hartman et al, 1987), and Shtienberg (1990) reported that leaf rust substantially decreases final seed mass in wheat. Previously a seed mass of 22 mg seed -1 was reported for EL-142 (Bejiga et al, 1995).…”

Section: Discussionmentioning

confidence: 95%

Yield loss of lentil caused byUromyces viciae-fabae

Negussie

Pretorius

2008

South African Journal of Plant and Soil

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Yield loss in lentil (Lens culinaris Medik.) due to rust (Uromyces viciae-fabae [Pers.] J. Schröt) was determined by assessing crop and disease parameters at different growth stages and leaf canopy layers in field epidemics at Akaki, Ethiopia. The epidemics were created by inoculation of the rust-susceptible cultivar EL-142 with U. viciae-fabae and spraying plots with tebuconazole at different frequencies. The epidemics produced disease progress curves that varied significantly in the rate (r L ) of temporal progression and area under the disease progress curve (AUDPC). The rust epidemic, in particular between early flowering and early pod formation, had a significant influence on seed yield, pods per plant and seed mass. Mean seed yield losses up to 41.6% were recorded. The number of seeds per pod remained unaffected by the disease. The effect of rust on seed yield of lentil can be predicted with AUDPC and critical-point models using disease severity assessed on the upper canopy layer in the early flowering stage. Every 1% increase in rust severity reduced seed yield by 8.4%. Rust severity ≥ 4.7% at the critical early flowering stage significantly reduced seed yield, and hence, any measure that keeps severity below this threshold level would be advisable.

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Section: Discussionmentioning

confidence: 95%

Yield loss of lentil caused byUromyces viciae-fabae

Negussie

Pretorius

2008

South African Journal of Plant and Soil

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“…It probably occurs as a complex of red leaf blotch and anthracnose on soybean. Disease samples collected during the growing season of 1994 from Central, Lusaka and Southern provinces of Zambia indicate that anthracnose of soybean occur widely and is probably an even more prevalent disease than red leaf blotch as reported by Sinclair (1982), Hartman et al . (1987) and Datnoff et al .…”

Section: Discussionmentioning

confidence: 99%

“…The crop has been relatively free from diseases in the past but there has, of late, been an increase in the incidence of new diseases. Red leaf blotch caused by Dactuliochaeta glycines is now a serious disease in Zambia (Javaid & Ashraf, 1978; Sinclair, 1982; Wellving, 1984; Datnoff et al ., 1987; Hartman et al ., 1987). Target spot caused by Corynespora cassiicola is another new disease (Kapooria et al ., 1998).…”

Section: Introductionmentioning

confidence: 99%

Occurrence and variability of Colletotrichum truncatum on soybean in Zambia

Mayonjo¹,

Kapooria

2003

EPPO Bulletin

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“…One of these that deserves mention is red leaf blotch, caused by the fungal pathogen Phoma glycinicola (Boerema et al 2004) formerly known as Dactuliochaeata glycines (Hartman and Sinclair 1988). Symptoms of red leaf blotch include lesions on foliage, petioles, pods, and stems (Hartman et al 1987). Lesions expand and coalesce to form large necrotic blotches up to 2 cm in diameter (Fig.…”

Section: Red Leaf Blotchmentioning

confidence: 99%