sentences:  One study has shown that this process of transmission also has negative effects on the leaf hopper itself, where significant numbers of leaf hoppers may die after being infected with "S. citri".The researchers suggest that this increased mortality may be as a result of ingesting toxins that are produced either by "S. citri" itself or by plants defending themselves against the pathogen.In any case, these toxins have a significant on the longevity of infected beet leafhoppers.