leaf blotch

leaf blotch

[′lēf ‚bläch]
(plant pathology)
A plant disease characterized by discolored areas in the leaves with indistinct or diffuse margins.
References in periodicals archive ?
Leafand head blight diseases are Powdery mildew, leaf rust, leaf blotch (Septoria tritici), Stagonospora (Septoria) nodorum leaf, glumes blotch and Fusarium head scab [8, 9].
Data has been submitted for review of several target diseases including: Northern corn leaf blight and gray leaf spot in corn; frogeye leaf spot, brown spot and white mold in soybeans; septoria leaf blotch, stripe rust and stem rust in cereals; early blight and white mold in potatoes; white mold in canola; stem rot, leaf spot, leaf rust and Rhizoctonia limb rot in peanuts.
Azoxystrobin helps in protecting crops against prevalent fungal diseases including Septoria leaf blotch, rye leafrust (Puccinia triticina), stripe rust, powdery mildew, wheat leaf rust (Puccinia recondita), and downy mildew.
AHELLEBORE leaf blotch, which is caused by a fungus, is the problem.
It used to be known as sectorial leaf blotch and glume blotch.
Typical symptoms of septoria leaf blotch appeared as chlorotic spots with the presence of small black dots that are pycnidia.
As well as field tours, networking opportunities and fruit tasting, the event also hosted presentations by Paul Sneyd from Haygrove in Ledbury on the latest developments in poly-tunnel technology, Dirk Aerts from Biobest in Belgium on pollination and the James Hutton Institute's Dr Stuart MacFarlane, who talked about a newly emerging virus, the raspberry leaf blotch virus, and what he and his team are doing to understand this virus and its impact on raspberry crops.
Mainly the accessions in the germplasm belonging to the groups which were classified as resistant against rusts septoria leaf blotch and hessain fly were showed high degree of resistant against aphids.
Ken Simons, Warwickshire County Council's forestry officer, said: "The wet start to the year has had a severe impact and this is coupled with many of our common horse chestnuts suffering attacks from a range of pests and diseases, namely bacterial bleeding canker, leaf miner and leaf blotch.
The problem is hellebore leaf blotch, which is caused by a fungus.
She also works on DNA markers for other traits, such as protein quality and resistance to leaf rust and tan spot in wheat and resistance to net blotch and Septoria speckled leaf blotch in barley.
Each leaf mine begins as a longitudinal mine on the underside of a sugarcane leaf that sometimes extends 12 cm or more in length and terminates in a leaf blotch (Fig.