Register      Login
Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality
RESEARCH ARTICLE

Perennation and control of Pseudomonas tomato in Victoria

SC Chambers and PR Merriman

Australian Journal of Agricultural Research 26(4) 657 - 663
Published: 1975

Abstract

Seed of tomato fruit affected by bacterial speck was examined for Pseudomonas tomato. The bacterium was isolated from seed taken directly from fruit, but not from seed extracted by the fermentation process.

Acid and fermentation extraction processes appeared to eliminate P. tomato. Pulp containing natural and/or added populations of the bacterium was non-infective at 1 hr and 48 hr after commencement of the acid and fermentation processes respectively.

Studies on the perennation of P. tomato showed that the bacterium survived in plant debris either on or 2 cm below the soil surface for the test period of 30 weeks; it also survived on Nylon mesh in soil for 25 weeks.

The incidence of bacterial speck in seedlings was reduced significantly (P = 0.01) by cupric hydroxide sprays, two sprays per week being more effective (P = 0.05) than one.

No heat-tolerant strain of P. tomato was detected, and thermal death points for isolates from green and ripe fruit were 48 and 49°C respectively.

https://doi.org/10.1071/AR9750657

© CSIRO 1975

Committee on Publication Ethics


Export Citation Get Permission

View Dimensions