New Zealand, Australia

Australian experts underscore importance of certified potato seed for black leg disease control

Related imageAround the world, blackleg of potato is caused by several species of bacteria that can be carried and transmitted through seed tubers. Potatoes Australia spoke to Agriculture Victoria Research Scientist Dr Rachel Mann and ViCSPA General Manager Dr Nigel Crump about the identification and management of the blackleg disease. The main causal agent of blackleg in Australia is Pectobacterium atrosepticum although another bacterium known as Dickeya dianthicola was discovered in Western Australia in 2017. Dr Rachel Mann has been assisting with the traceback of the disease. “Blackleg is something that people can readily identify in the field, although it is not possible to determine which bacteria is causing it,” Dr Mann said. Seed tubers are the most important source of inoculum in the blackleg disease cycle. Therefore, management of the disease largely relies on the use of certified seed. “Due to the use of clean seed, blackleg is not very prevalent in Australia,” said Dr Nigel Crumm. Read full article on p20 of the June/July issue of Potatoes Australia