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Some weed species as a test of the pathogenicity of phytopathogenic pseudomonas ii. reaction of jimsonweed datura stramonium l. and lamb's quarters chenopodium album l



Some weed species as a test of the pathogenicity of phytopathogenic pseudomonas ii. reaction of jimsonweed datura stramonium l. and lamb's quarters chenopodium album l



Zastita Bilja 37(3): 225-229



Simson weed (D. stramonium L.) and Lamb's quarters (Ch. album L.) were reared in the glasshouse from seeds and having reached the stage of adult plants, used as a test of pathogenicity of the phytopathogenous bacteria of the genus Pseudomonas. The inoculation of their leaves was effected by the infiltration of the bacterial suspension in the concentration of 107 cells/ml. For this purpose were used the isolates of the following bacteria: Pseudomonas syringae pv. syringae, Ps. s. pv. morsprunorum, Ps. s. pv. glycinea, Ps. s. pv. lachrymans, Ps. s. pv. mori, Ps. s. pv. phaseolicola, Ps. s. pv. pisi, Ps. s. pv. savastanoi, Ps. s. pv. sesami, Ps. s. pv. tabaci, Ps. s. pv. tomato, Ps. s. pv. ulmi, Ps. caryophyli, Ps. solanacearum, Ps. viridiflava and others. All the isolates which were used caused the necrosis of inoculated leaves of D. stramonium within the 24 hours from the infiltration of the suspension of the above bacteria. The saprophytic isolates (Ps. fluorescens) and water do not cause any changes. Consequently, the Simson weed can be used as test plant for the verifying of pathogenicity of bacteria belonging to the genus Pseudomonas. Lamb's quarters (Ch. album) could not be recommended for the time being, for on its leaves inoculated with the suspension of bacteria does not appear typical necrosis, but rather mostly chlorosis of the tissues.

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