Reaction of soybean lines to stem canker

Abstract

-Objectives of this study were the evaluation of the reaction to stem canker in F 8 soybean lines; analysis of the consistence of the symptom evaluation in different periods; as well as the consistence of scores based on different numbers of plants per row. Twelve days after sowing the plants were inoculated with isolate CH 08 by the tooth-toothpick technique and the symptoms evaluated 10, 20, 40, and 73 days after the inoculation (DAI). Ten lines with resistance reaction were identified. The scores attributed in the different evaluation periods were in line and

Inoculation Method Impacts Symptom Development Associated with Diaporthe aspalathi, D. caulivora, and D. longicolla on Soybean (Glycine max)

“…To determine the aggressiveness of Diaporthe isolates on soybean, four inoculation methods commonly used for Diaporthe-associated pathogenicity studies in different plant species (e.g., Glycine max, Helianthus annuus, Lupinus albus) were compared. These included: the stem-wound method (Benavidez et al 2010;Chiesa et al 2009;Mathew et al 2015aMathew et al , b, 2018a; toothpick method (Backes et al 2005;Campbell et al 2017;Keeling 1982;Lu et al 2010;Pioli et al 2003;Ploetz and Shokes 1987); mycelium contact method (Thompson et al 2011); and spore injection method (Chen et al 2009;Kmetz et al 1979).…”