Leptinotarsa decemlineata vector of Clavibacter michiganense pv. sepedonicus
In North Dakota, US, several insects were screened under field and laboratory conditions for their capability to transmit Clavibacter michiganense pv. sepedonicus (EPPO A2 organism). Besides Myzus persicae, Leptinotarsa decemlineata was found to vector the potato ring rot pathogen. Not only adults, but also larvae of the Colorado beetle could transmit the pathogen which happens most likely by mechanical means since the bacterium was identified on the mouthparts of the beetles and larvae.
Sources
Christie, R.D.; Sumalde, A.C.; Schulz, J.T.; Gudmestad, N.C. (1991) Insect transmission of the bacterial ring rot pathogen.
American Potato Journal 68, 363-372.