Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Trials of some control of tomato bacterial wilt caused by Pseudomonas solanacearum.

Abstract

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.