necrotic ring spot

necrotic ring spot

[nə′kräd·ik ′riŋ ‚spät]
(plant pathology)
A virus leaf spot of cherries marked by small, dark water-soaked rings which may drop out, giving the leaf a tattered appearance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Another common and more serious turf problem is "frog eye" or Necrotic Ring Spot (NRS).
Necrotic ring spot, mildew, as well as root and crown rots flourish in cool weather on saturated soils.
Older patches of necrotic ring spot and summer patch diseases often exhibit a distinctive pattern--light brown dead patches with green areas in the center (Figure 16-5).
Beyond exhibited good resistance to leafspot [caused by Drechslera poae (Baudys) Shoem] and necrotic ring spot [caused by Ophiosphaerella korrae (J.C.
Cabernet exhibited very good resistance to necrotic ring spot [caused by Ophiosphaerella korrae (J.C.
Bennett), stripe smut [caused by Ustilago striiformis (Westend.) Niessl], powdery mildew (caused by Erysiphe graminis DC), summer patch (caused by Magnaporthe poae Landschoot & Jackson), and necrotic ring spot (caused by Leptosphaeria korrae J.C.
poae), necrotic ring spot (caused by Leptosphaeria korrae J.
Odyssey showed improved resistance to drought (dormancy), leafspot, and melting out [caused by Drechslera pone (Baudys) Shoem], necrotic ring spot (caused by Leptosphaeria korrae J.
In the same trials, Award demonstrated improved drought tolerance (dormancy), resistance to leafspot and melting out [caused by Drechslera poae (Baudys) Shoem], necrotic ring spot (caused by Leptosphaeria korrae J.
In the same trial, Liberator demonstrated improved drought tolerance (dormancy), resistance to leafspot and melting out (caused by Drechslera spp.), necrotic ring spot (caused by Leptosphaeria korrae J.
In the same test, NuGlade demonstrated improved drought tolerance (dormancy), resistance to leafspot and melting out [caused by Drechslera poae (Baudys) Shoem], necrotic ring spot (caused by Leptosphaeria korrae J.
graminis Pers.:Pers.), necrotic ring spot (caused by Leptosphaeria korrae J.