Lawn Diseases
Necrotic Ring Spot – also known as Leptosphaeria korrae. the most damaging disease that is commonly found on sodded lawns in the first 5 years after establishment. Its symptoms start as yellow patches which can coalesce. When the disease progresses, brown rings with healthy grass inside start to grow and the turf that is approximately 10cm to 1m diameter rings can easily be pulled out due to its dead roots and crowns.In order to avoid narcotic ring spot do not put too much fertilizer in your lawn. Applying fertilizer between June and August can stimulate the growth of necrotic ring spot. Acidic soils promote the growth of necrotic ring spot too. So check the pH of your soil and make sure that it is above 6.2.
Spruce Gall - Pineapple shaped galls found at the base of shoots of the current season’s growth are caused by the sucking feeding of the adults and nymphs. Often tips of branches are dead if the plant is heavily infested theyare formed through the small insectswho feeds on the vegetationof spruce trees.The insects has two types that cause spruce gall to grow: the Cooley Spruce Gall Adelge, and the Eastern Spruce Gall Adelge they can be 1-2 inches long and almost an inch in diameter when they developed.
Rhizoctonia – A fungus which lives in soil and roots of plants. The fungus can’t be seen unless under magnification. If plants are being dug up, ans washed in water ther roots will appear brown and rotten. Early in the disease the roots have sections which are thinner than remasining root due in the outer layerroot sheath being rotted off. There are often some recovery on the affected. But if the plants will lose its its roots stress will severly affect them. Plants do survive because we have less tillers and heads than undiseased plants.
