title: Tests in vitro and in pots with certain chemicals for inhibition of Pseudomonas solanacearum.
abstract: Twenty one isolates of Pseudomonas solanacearum E. F. Smith (Race 3) from various parts of Egypt were inhibited in vitro by Ampicillin, Chloramphenicol, Kanamycin, Oxytetracycline. Tetracycline, Penicillin G, Streptomycin, Nabam (Dithane A-40), Maneb (Dithane M-22), Zinc-ion maneb complex (Dithane M-45), and the insecticide Chlorthion. On the basis of in vitro-sensitivity to the selected 11 chemicals the 21 isolates could not be separated into different groups. Carbendazin (Bavistin), Benomyl, Drazoxolon (Mil-Col), and Temik proved ineffective in inhibiting the in vitro growth of all isolates at all tested concentrations. Preliminary investigations indicate that drenching the soil with solutions of Dithane M-22 (0.25% w/v, Dithane M-45 (0.25%) w/v, or insecticide Chlorthion (50 microgram/ml active ingredient) decreased the incidence of potato wilt disease that developed in soil, artificially infested with P. solanacearum.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D010575:Pesticides / Q000494:pharmacology*; D010935:Plant Diseases; D011549:Pseudomonas / Q000187:drug effects* / Q000254:growth & development; D012988:Soil Microbiology
chemical_list: D000900:Anti-Bacterial Agents; D010575:Pesticides