Trials of some control of tomato bacterial wilt caused by Pseudomonas solanacearum.
Symptoms appeared on all plants in untreated plots 56-71 d after planting. Yields from these plots were 8.9-18.8 kg in 16 plants. The soil fumigants chloropicrin, methyl bromide and dazomet were not effective, while Di-Trapex [methyl isothiocyanate] had little effect on the disease. Of 5 soil conditioning materials tested, only Saroton-G (containing well-rotted fowl droppings, zeolite and blended useful Gram- facultatively anaerobic bacteria:150 kg/10a) was effective for the control of the disease when mixed in the soil after fumigation. Control by S 6035 (morpholinium phenylphosphinate) was best using a 10% powder mixed in soil before planting, plus foliar application of 1/1000 solution during growth without soil fumigation. Integrated control by soil fumigation with Di-Trapex, soil mixing with Saroton-G and application of S 6035 was most effective; symptoms did not appear until 81 d after planting and the yield was c. 4 times that from the untreated plot.