Let us focus on the effects of viruses on cannabis plants this time. Among the warning signs of virus-infected cannabis plants is the great lowering of the yield generated. As soon as the virus assaults, it is nearly impossible to erase them because they spread quite easily and rapidly to all sections of the plant. HSV The hemp streak virus (HSV) is a frequent viral disease found on cannabis plants in the continent of Europe. Warning signs on the foliar include things like the ...