erwinia amylovora bacteria atacks fruit trees leaves. disease of fruit trees.

agriculture amylovora antibiotic apples assault attack autumn bacteria color contagious death detail disease diseased diseases enterobacteriaceae enterobacteriales environment erwinia fireblight fruit fungicides fungus gammaproteobacteria garden green herbicides horticulture illness infections insecticides july leaves local pathogen pathology pear pears plant proteobacteria resistance rust trellis unhealthy yellow