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.
Yellow Leaves on a Pepper Plant Caused by Pests. Pests can also cause pepper plants with yellow leaves. Pests like mites, aphids and psyllids will suck on the plant and divert nutrients and water. This will cause the pepper plant leaves to turn yellow. If you suspect that the yellow leaves on your pepper plant is caused by pests, treat the plant with an insecticide.