Fungicide Resistance of and Isolates from Mandarin Fruit and Its Influence on Control of Postharvest Alternaria Rot.

Alternaria rot, caused by and , is one of the common postharvest diseases affecting mandarin fruit in California. Fungicide resistance profilings of and to quinone outside inhibitors (QoIs), fludioxonil, pyrimethanil, imazalil, and propiconazole were examined in this study. Of the 100 isolates of and , 40 were identified as resistant to QoI fungicides according to a PCR-restriction fragment length polymorphism based on a partial gene.

Baseline Sensitivity of and to Natamycin and Control of Alternaria Rot on Stored Mandarin Fruit.

Alternaria rot caused by and is one of the major postharvest diseases on mandarin fruit in California. In this study, natamycin, a newly registered biofungicide, was evaluated for its potential as a postharvest treatment to control Alternaria rot on mandarin fruit. The baseline sensitivities of and to natamycin were determined.

Phylogenetic, Morphological, and Pathogenic Characterization of Species Associated With Fruit Rot of Mandarin in California.

Alternaria rot caused by species is one of the major postharvest diseases of mandarin fruit in California. The aims of this study were to identify these species via phylogenetic analyses and morphological characteristics and test their pathogenicity on mandarin. Decayed mandarin fruits exhibiting Alternaria rot symptoms were collected from three citrus fruit packinghouses in the Central Valley of California.

spp.: A Contemporary Perspective and Synthesis of Recent Scientific Developments of a Widespread Genus that Threatens Global Food Security.

This perspective presents a synopsis of the topics contained in the Pathogen Spotlight on spp. causing gray mold, including pathogen biology and systematics, genomic characterization of new species, perspectives on genome editing, and fungicide resistance. A timely breakthrough to engineer host plant resistance against the gray mold fungus has been demonstrated in planta and may augment chemical controls in the near future.

Population Genetics and Fungicide Resistance of on and spp in California.

, the causal agent of gray mold, has high genetic diversity and a broad host range. In sp. and spp.

Detection and Identification of Six Monilinia spp. Causing Brown Rot Using TaqMan Real-Time PCR from Pure Cultures and Infected Apple Fruit.

Brown rot is a severe disease affecting stone and pome fruit. This disease was recently confirmed to be caused by the following six closely related species: Monilinia fructicola, M. laxa, M.

Timing of Perennial Canker Development in Apple Trees Caused by Neofabraea perennans and Neofabraea kienholzii.

Members of the genera Neofabraea and Phlyctema have been reported to incite canker diseases of apple trees and a postharvest decay of apple fruit referred to as "bull's-eye rot." Neofabraea kienholzii was recently identified as participating in the bull's-eye rot disease complex of apple and other pome fruit. In this study, apple twigs inoculated with N.

Dynamics of verticillium species microsclerotia in field soils in response to fumigation, cropping patterns, and flooding.

Verticillium dahliae is a soilborne, economically significant fungal plant pathogen that persists in the soil for up to 14 years as melanized microsclerotia (ms). Similarly, V. longisporum is a very significant production constraint on members of the family Brassicaceae.

Description of Cryptosporiopsis kienholzii and species profiles of Neofabraea in major pome fruit growing districts in the Pacific Northwest USA.

The objectives of this study were i) to give a taxonomic description of a fungus phylogenetically related to Neofabraea and assign the name Cryptosporiopsis kienholzii to this fungus, ii) to expand previous Neofabraea species profiles from infected apple and pear fruit collected from major pome fruit production districts in Oregon and Washington, and iii) to determine the sensitivity of Neofabraea alba, Neofabraea malicorticis, Neofabraea perennans, and C. kienholzii to a range of fungicides. A name is given herein to the anamorph of the fungus previously called 'Neofabraea sp.