according to literature are now considered separate species. These strains are the Beet severe curly top virus (BSCTV) and Beet mild curly top virus (BMCTV). So far, the methods of transmission for all three strains seem to be the same. Transmission In order to understand the movement of the MBCTV inside its hosts, experiments have been conducted using PCR analysis which allow for the detection and quantification of MBCTV particles inside leafhoppers. One such study measured the amounts of MBCTV found in the gut, hemocoel and salivary glands of beet leafhoppers and found that the virus was present in all those regions suggesting that the virus may use a circulative transmission mechanism inside its host. A circulative transmission mechanism refers to a transmission mechanism in which the vector ingests a pathogen during feeding from an infected host, the pathogen is absorbed in the vector’s gut and then travels through the hemocoel into the salivary glands. When the vector then bites into an uninfected host, the pathogen enters the new host. This mechanism is similar to the transmission mechanism used by "Spiroplasma citri" in transmitting the Stubborn citrus disease which also uses the beet leafhopper as a vector. In the same study, researchers were able to detect viral particles of MBCTV in beet leafhopper guts after as soon as an hour of feeding on infected plants. Furthermore, they found that insects that had fed on an infected plant for an hour were able to spread the disease to uninfected plants. These findings suggest that the insects become virulent very shortly after feeding on infected plants. The study also found that as time of feeding on infected plants increased, the numbers of viral particles in the gut, hemocoel and salivary glands of the insects also increased, even though there were individual differences in the amounts of BMCTV particles detected in the body. Another important finding of this study was showing that individual insects can maintain MBCTV in their bodies for up to a 30 days after getting infected by it, even though the amount of virus detected does not increase in this period. The authors propose that this indicates that MBCTV is unable to replicate within its vector. It was also found that the virus is not transmitted between generations of beet leafhoppers from adults to nymphs, proposing that the virus does not use transovarial transmission. In another study, waveforms from electrical