Bacteria as plant pathogens can cause severe economically damaging diseases, ranging from spots, mosaic patterns or pustules on leaves (Figure 5) and fruits, or smelly tuber rots to plant death.
Size of force or number of deaths does not necessarily equate to worst - the question is not what was the largest defeat nor was it what was the defeat with the most casualties. As such, I would suggest that the worst defeat in US military history was the Battle of Little Big Horn, or Custer's Last Stand - a hastily decided attack by Custer left his troops ripe for the picking by the Soux and Apache warriors.
The 'Intra-War Era', including the Roaring Twenties and the worst of the Great Depression, saw 5 of the 10 largest margins of victory ever in US Presidential Elections. In 1920, James Cox (pictured) suffered the worst defeat in the popular vote in US Presidential history as the hands of Warren G. Harding. The 1928 Presidential Election ushered in a landslide victory for the Republican candidate, Herbert Hoover, who won by the large margin of 17.41% in the elections.