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.
Chlorosis â The reason why leaves are turning yellow could be an abnormal condition called chlorosis. Chlorosis is when the yellow leaves are missing the green pigment called chlorophyll. There are specific causes why plant leaves turn yellow due to chlorosis.f you have houseplants that have yellow leaves, check the soil in the pot to see if it is dry. If you find this is why leaves are turning yellow, simply water the plant and consider leaving the pot to sit in a dish to catch overflow and allow the roots to absorb the extra water when needed. Advertisement.