Advanced Materials Science Research

Citrus Black Rot

Phylogenetic analysis revealed that isolates of Alternaria alternata causing plant disease of citrus were related to six well-supported evolutionary lineages. In the combined phylogeny, isolates from diverse ecological niches on citrus and non-citrus hosts were distributed in eight clades. Isolates from all lineages, no matter ecological or host association, caused plant disease in fruit inoculation assays, demonstrating that small-spored Alternaria isolates related to different ecological niches on citrus and other plant hosts are potential plant disease pathogens. These data also indicated that the fungi related to black-rotted fruit don't form a natural evolutionary group distinct from other Alternaria pathogens and saprophytes related to citrus. The use of the name A. citri to explain fungi related to citrus plant disease isn't justified and it's proposed that citrus plant disease fungi be mentioned as A. alternata.  The drier inland developing areas (for example Vic, SA and southern and inland NSW) have just a couple of malady pathogens that influence lemons. The most well-known maladies in these territories are earthy colored decay, neckline decay, septoria spot, oily spot and citrus impact/dark pit. In Australia most parasitic pathogens in citrus are controlled utilizing utilizations of protectant copper based splashes. At present there are not a ton of different fungicides enrolled for use in citrus.  

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