Alternaria leaf spot

[4] One commercially relevant plant genus that can be affected by Alternaria Leaf Spot is Brassica, as the cosmetic issues caused by symptomatic lesions can lead to rejection of crops by distributors and buyers.

Secondary soft-rotting organisms can infect stored cabbage that has been affected by Alternaria Leaf Spot by entering through symptomatic lesions.

[5] Areas with higher rainfall that experience wet, mild seasons lead to the highest reports of disease incidence.

[6] Water promotes disease development as the pathogens only undergo germination and infection after more than nine hours of leaf wetness.

If there are no pathogens present, they cannot produce microsclerotia and chlamydospores that would eventually be input into the surrounding area via plant debris, reducing chances of future infection.

[5] Morning irrigation promotes shorter periods of leaf wetness, disrupting the pathogens’ germination and infection.

Application of straw mulch can reduce disease incidence by acting as a barrier against soil-borne inoculum, disrupting dispersal of conidia from conidiophores developed from microsclerotia and chlamydospores.

[7] Maintaining control of cruciferous weeds is another important management practice, as this removes potential hosts for the pathogen that can aid in the spread of the disease.