Mixed model analysis combining disease ratings and DNA sequences to determine host range of Uromyces salsolae for biological control of Russian thistle

Berner, D. K.; Bruckart, W. L.; Cavin, Christophe; Michael, J.L.

doi:10.1016/j.biocontrol.2009.01.001

Cited by 10 publications

(1 citation statement)

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“…This was done for two exotic pathogens of S. tragus which are from the native range of the weed (Farr and Rossman 2011). These pathogens were an obligate pathogenic rust fungus Uromyces salsolae Reichardt (Basidiomycota, Pucciniaceae) (Berner et al 2009a (Berner et al 2009b). Results indicated that of the 64 species analyzed for susceptibility to U. salsolae only non-native Salsola spp.…”

Section: Introductionmentioning

confidence: 97%

Finalizing host range determination of a weed biological control pathogen with best linear unbiased predictors and damage assessment

Berner

Cavin

2011

BioControl

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Colletotrichum gloeosporioides f. sp. salsolae (Penz.) Penz. & Sacc. in Penz. (CGS) is a facultative parasitic fungus being evaluated as a classical biological control agent of Russian thistle or tumbleweed (Salsola tragus L.). In initial host range determination tests, Henderson's mixed model equations (MME) were used to generate best linear unbiased predictors (BLUPs) of disease severity reaction to CGS among 89 species of plants related to S. tragus. The MME provided: (1) disease assessments for rare and difficult or impossible to grow species, (2) environmentally independent measures of disease severity, (3) measures of disease severity for species versus a sample of material tested in a greenhouse, (4) objective indicators of susceptible and non-susceptible species, (5) a means to objectively compare disease on targets versus nontargets. Of the 89 species evaluated by the MME, eight native N. American species were predicted to be susceptible. As a result of these predictions, these eight species were further evaluated to determine the amount of actual damage caused by CGS. This was done by comparing root and shoot areas and weights between non-inoculated plants and plants inoculated with CGS. Results showed that several of the species exhibited some minor reduction in root weight and root area, but none of the species had any damage to above-ground plant parts. This supports the BLUP output in the initial host range determination tests. As a result of both analyses, there is no evidence that CGS would cause any non-target effects in nature.

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Section: Introductionmentioning

confidence: 97%