Abstract
A nonpathogenic strain of Xanthomonas sp. 11-100-01 was tested for its ability to control bacterial canker of citrus. The nonpathogenic bacterium survived on wounded citrus leaves for up to 2 weeks. The strain 11-100-01 sprayed at 108 cfu/ml officially reduced the leaf symptoms on potted citrus plants ‘Harumi’ inoculated by X. citri subsp. citri. In a field test, the application of the strain 11-100-01 in combination with copper formula effectively reduced the canker disease on leaves and fruits. This bacterial strain was considered as a practical alternative for copper formula which usually causes phytotoxicity in summer time.
