Diseases
Zea mays L. subsp. mays (Maize Group)
A group of maize diseases caused by pathogens Cochliobolus heterostrophus (southern corn leaf blight) and Setosphaeria turcica (northern corn leaf blight), affecting leaves and generative organs.
In the reference 244 varieties crop Maize, where this is mentioned in the description.
Southern corn leaf blight, caused by Bipolaris maydis, is subdivided into races O, T, and C. Race T possesses high virulence to hybrids with Texas male-sterile (T) cytoplasm by producing a host-specific toxin. Symptoms manifest as spindle-shaped lesions with a dark center and velvety mold on the ears, leading to kernel rot.
Northern corn leaf blight, caused by the pathogen Exserohilum turcicum, is characterized by the appearance of large brown lesions measuring up to 10–25 cm in length with a reddish-brown border. Under high humidity, the lesions are covered with the olive-colored sporulation of the pathogen.
Breeding for resistance relies on the use of specific genes, such as HM, responsible for the response to toxins, and the rhm1 gene associated with resistance to southern corn leaf blight. In most cases, varietal resistance is considered a quantitative trait inherited through additive and dominant gene effects, controlled at the level of QTL loci.
General information about the subject — on the page Helminthosporiosis.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Zea mays L. subsp. mays (Maize Group) · Maize
Monsanto Technology LLC, US
Zea mays L. subsp. mays (Maize Group) · Maize
Monsanto Technology LLC, US
Zea mays L. subsp. mays (Maize Group) · Maize
Maisadour Semences, FR
Zea mays L. subsp. mays (Maize Group) · Maize
KWS SAAT SE & CO.KGAA
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INT.INC/PIONEER OVERSEAS CORP.
Zea mays L. subsp. mays (Maize Group) · Maize
Monsanto Technology LLC, US
Zea mays L. subsp. mays (Maize Group) · Maize
Northrup King Semences SA (FR)
Zea mays L. subsp. mays (Maize Group) · Maize
Syngenta Crop Protection AG, Seeds Division, CH
Zea mays L. subsp. mays (Maize Group) · Maize
FREIHERR VON MOREAU SAATZUCHT
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
Pioneer Overseas Corporation US (USA)
Zea mays L. subsp. mays (Maize Group) · Maize
Pioneer Overseas Corporation US (USA)
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INT.INC/PIONEER OVERSEAS CORP.
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INTERNATIONAL
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INT.INC/PIONEER OVERSEAS CORP.
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INT.INC/PIONEER OVERSEAS CORP.
Zea mays L. subsp. mays (Maize Group) · Maize
Pioneer Hi-Bred International Inc (US)/Pioneer Overseas Corporation (US)
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER HI-BRED INTERNATIONAL