Sources of infections
Construction of greenhouse trolleys
Dried plant sap with a rough surface on parts of the trolley can easily spread the virus.
Capillaries
The virus is able to spread through capillaries. Disinfecting irrigation systems does not guarantee getting rid of the virus. Capillaries must be disinfected separately.
Work
The spread of viral infection in the greenhouse also occurs through workers (infection through plant sap)
Placement of the lower pipes of the heating system
The pipes must be placed centrally to reduce the contact between garden trolleys and plants and thus reduce the spreading of infection.
Aphids
The rasping-sucking mouthparts of these pests make aphids vectors of viral transmission
Thrips
Also, thrips, due to their rasping-sucking mouthparts, can transmit viruses.
Bumblebees
Unfortunately, bumblebees also contribute to the transmission of viruses.