Yield loss of lentil caused byUromyces viciae-fabae

Abstract

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.

Seedborne mycoflora of faba bean (Vicia fabae L.) and evaluation of plant extract and Trichoderma species against mycelium growth of selected fungi

“…were observed and identified. These results are in agreement with the findings of other researchers [ 15 , [38] , [39] , [40] , [41] ]. Among the isolated fungi, Fusarium and Aspergillus species were the most predominant fungi in all seed samples.…”

Pulses Diseases “Important limiting factor in yield’’ and their Managements

“…Seed yield loss in lentils attributable to rust has been estimated at 25% in Ethiopia. In 1997, however, a lentil rust outbreak throughout Ethiopia caused yield losses of up to 100% [143]. About 2500 ha of lentil being completely wiped out by rust in the Gimbichu district of Ethiopia.…”

Identification of pre‐ and posthaustorial resistance to rust (Uromyces viciae‐fabae) in lentil (Lens culinaris) germplasm

“…). Rust is widespread globally and is considered a production problem particularly in North Africa and Asia, but also in Ethiopia and South America (Negussie and Pretorius , Chen et al. , Rubiales and Fernández‐Aparicio ).…”