cotton growth Xanthomonas campestris Xanthomonas Gossypium barbadense pathogen
disease control fungi bacterial count seed treatment epiphytic microorganism Azotobacter
chroococcum gibberellic acid fungal isolation biological control microbiology cotton seed
seed borne isolate seed plant growth regulator endophytic bacteria microorganism bacterial
isolate endophytic microorganism bacteria isolation frequency Streptomyces atroolivaceus

X. c. pv. malvacearum was identified among 7 epiphytic and endophytic microorganisms
isolated from cotton seeds (cv. Giza 177). Coating seeds with cells of A. chroococcum and S.
atroolivaceus or soaking in bacterial crude preparations or extracted metabolites and indole-
3-acetic acid (IAA) or gibberellic acid (GA3) significantly reduced disease symptoms and
counts of X. c. pv. malvacearum in infected leaves. Symptom-free leaves and the lowest
bacterial counts were obtained with seed soaking in acidic diethyl ether extracts from culture …