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.
Brown patch can be a problem in zoysia grass. Rhizoctonia fungus is often the culprit, caused by overfertilization. Fortunately, it does not kill the grass and zoysia is able to recover as it fills in during the warmer weather.Proper fertilization and watering helps to control this disease.oysia grass tends to produce thatch from dried cuttings and dead material that can cause brown patches on the lawn. This material can get quite thick and tangled and prevent fertilizer and moisture from reaching the soil and roots.