Log in here. This course package covers everything you need to know about the National Airspace System, including Class A-G airspace, Special Use Airspace, and Other Airspace. It's an excellent way to prepare for your private pilot checkride and keep your flying skills sharp.It works on your computer, tablet or phone.og in here. This course package covers everything you need to know about the National Airspace System, including Class A-G airspace, Special Use Airspace, and Other Airspace. It's an excellent way to prepare for your private pilot checkride and keep your flying skills sharp.
Brown patch is a turfgrass disease that is caused by the Rhizoctonia species fungus.This turfgrass disease is most common Brown patch can be found in all of the cool season turfgrasses found in the United States.rown patch is most devastating to: Bentgrass (Agrostis sp.), ryegrass (Lolium sp.), Annual bluegrass (Poa annua), and Tall fescue (Festuca arundinacea). Brown patch is also found in Kentucky bluegrass (Poa pratensis) and Fine fescue (Festuca sp.) but this is rare or does minimal damage.
A Fungus Among Us. Various diseases attack and damage grass, resulting in unsightly brown spots. Hot, humid weather provides the conditions needed by lawn fungus, which creates round patches of brown grass up to several feet in diameter. However, some fungal diseases attack lawns even in cold weather.