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.
The best way to prevent brown patch or large patch in the home lawn is by following good lawn care practices. This is much easier and less expensive than the use of fungicides and can be very effective. Avoid high rates of nitrogen fertilizer on cool-season grasses in the late spring and summer.