GreenCast Korea - Leaf Spot
Caused by: Bipolaris sorokiniana (Sacc.) Shoemaker, Curvularia spp., Dreschlera spp.
Plate 1: Dreschlera siccans on perennial ryegrass
병징은 병원균과 잔디 종유에 따라 다르다. 일반적으로 황화 또는 연녹색의 잎 가장자리가 관찰되며 반점 또는 병반이 관찰된다. 잔디가 앏아지거나 건조 피해처럼 보인다.
Symptoms depend on the grass species and the pathogen involved. Generally a yellowing or paling of the leaf blades may occur, accompanied with spots or lesions developing (Plate 1. Lesions may girdle the leaf and the portion above the girdle withers. The sward may thin or look drought stressed.
어디에 발병하는가? Where is leaf spot found?
Any area of turf, especially golf greens, tees, fairways, bowling greens, lawns, parks and sports pitches.
All grass species can be affected by leaf spots
언제 잔디에 잘 감염되는가?When is leaf spot likely to attack turf?
During the summer months, when the temperatures are high. Humid conditions encourage outbreaks.
진행 경과 Effects of leaf spot
Minor infection may result in lesions on leaves but no other effects
Severe infection may thin the sward, cause dieback and leave patches with weak turf, affecting the aesthetic value and the playability of the turf
감염되기 쉬운 조건 High risk situations
Leaf spots occur in mild and warm temperatures (around 20ºC). As the temperature increases (25 - 35ºC) blighting and melting out occurs.
Cutting heights lower than recommended for the grass species
Excessive thatch layers
The removal of excess thatch and use of a higher mowing height can reduce occurrence of disease.
헤리티지의 효과가 우수하였다.Trials in the USA have shown Heritage control of bipolaris sorokiniana, Curvularia spp. and Dreschleraspp.