Diseases caused by bacteria represent a new challenge for Eucalyptus spp. and may also limit the use of susceptible clones. Our study aimed at an evaluation of the efficiency of antibiotics and rhizobacteria in inhibiting "in vitro" growth of phytopathogenic bacteria isolates in Eucalyptus spp. during the nursery stage and in the field. The antibiotic amicacine sulfate and rhizobacterium S1 (Bacillus subtilis) stood out inhibiting the growth of the phytopathogenic isolate IP1-05 (Pseudomonas chichorii), whereas cefoxitin caused a greater inhibition of the isolates BSV16 and RVV11 (Rhizobium sp.). The commercial antibiotics for agricultural use Mycoshield (oxitetracycline) and Agrimycin (estreptomycin and tetracycline) were little effective. This study offers a base for alternatives of biological control of bacterial diseases in Eucalyptus spp. nursery seedlings.
Phytopathogenic bacteria; rhizobacteria; antibiotics; Eucalyptus spp. and cloning
