Lung VQ Scan. Also known as lung or pulmonary ventilation (V) and perfusion (Q) scans. A lung VQ scan is an imaging test that uses a ventilation (V) scan to measure air flow in your lungs and a perfusion (Q) scan to see where blood flows in your lungs. It uses special x ray scanners outside of your body to create pictures of air and blood flow patterns in your lungs.
Yellow leaf spot, also known as leaf septoria, are caused by Septoria cannabis and S. neocannabina. These are fungal pathogens aimed specifically at marijuana plants. It is brought about by warm weather and rain and effect marijuana grown outdoors.
This causes the leaves to initially yellow, dry up and turn brown. Spider mites thrive in hot weather and are worse in dry, hot summers. The phlox bugâs feeding causes white or light green spots on the leaves and buds. The leaves will eventually turn brown, dry out and drop off. The symptoms can be so severe that plant growth may become impeded and die. The phlox bug lives in the egg stage through winter on dead stems.