x��=َ�ȑ���b�h�)�I0�Ռ���%��xJ���5�>\]I��;G�$��c����*23232��z��p�]nΏ�?�����qs~��X������?��~������vs�����/^~�����'Ͽ��n�����'b����J�Uke���ۛ�O������ׯ*٬o�3�>V��z���O� ��պ���m%��P��>3����Zx���}կW��OwU����aļ�����M�����@�x3�r�P�5[a���.��y]�i�� %���S��E�՝ȗ�*�훺3y�*��Z��;\%.0Nt��I�%%#��� Exserohilum turcicum is an important pathogen of both sorghum and maize, causing sorghum leaf blight and northern corn leaf blight. However, this requires the identification and use of stable resistance genes that are effective across different environments. Until the middle oft the 90s leaf blight of maize was considered to be a problem of warm humid maize growing areas as in our neighbouring countries in the south and overseas. Turcicum leaf blight (TLB) of maize caused by Exserohilum turcicum (Pass) Leonard. saff 0.25% recorded the lowest percent disease index (PDI) Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. 4) Banded leaf and sheath blight. K.J. A study was carried out to identify the sources of resistance to Turcicum leaf blight (TLB) and polysora rust in maize. Turcicum Leaf blight (TLB) of maize caused by Exserohilum turcicum (Pass.) Index Terms- Maize, turcicum leaf blight, Exserohilum turcicum, Mancozeb, Management I. Turcicum leaf blight (TLB) or Northern Corn Leaf Blight (NCLB) is a ubiquitous foliar disease of corn (maize) caused by Exserohilum turcicum, the anamorph of the ascomycete nfected maize residue at the soil surface. Leonard and Suggs (Syn. This disease is popularly known as Northern Corn Leaf Bight (NCLB) in the United States of America. it is important to control diseases of maize which are mention below as it causes yield losses. It was observed that in the V10 stage of maize plants, isolate 8 (Bacillus spp.) Northern corn leaf blight (NCLB) caused by Exserohilum turcicum is a destructive disease in maize. Seven fungicides were evaluated in vitro against Exserohilum turcicum causing leaf blight of maize The treatment mancozeb 0.25% and combination treatments of carbendazim and mancozeb i.e. With its characteristic cigar-shaped lesions, this disease can cause significant yield loss in susceptible corn hybrids. The disease is more prevalent in humid weather with temperature between 20â28 °C and causes small cigar-shaped lesions to complete destruction of the foliage. %PDF-1.5
Suggs (teleomorph Setosphaeria turcica Luttrell) was first observed by Passerini on corn in Italy in 1876, and has been reported from all maize growing areas of the world wherever maize is cultivated (Atac. Exserohilum turcicum). INTRODUCTION Maize (Zea mays L.) is one of the important cereal crops and it is third major crop in India after rice and wheat. Based on the colony color all the eight isolates were grouped in to 5 categories i.e., gray, dark grey, very dark gray, very darkish brown and black. Northern corn leaf spot. Varietal resistance is the most efficient technique to control NCLB. Setosphaeria turcica; the asexual stage name is Exserohilum turcicum. 5)Downy mildew. The disease is favoured by mild temperature and high humidity (Ullstrup, 1970). Maize leaf showing elongated, spindle-shaped necrotic lesions caused by turcicum leaf blight (Setosphaeria turcica, anam. stream
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Spores are produced on this crop residue when environmental conditions become favourable in the spring and early summer. Scientific Name. 2) Post flowering stalk rot. When infection occurs prior to and at silking and conditions are optimum, it may cause significant economic damage. The most important diseases of maize in Nepal are leaf blights (turcicum and maydis leaf blight), ear rot, stalk rot, rust, downy mildews, etc. Leaf blight - Helminthosporium maydis(Syn:H. turcicum) Symptoms The fungus affects the crop at young stage. The major diseases that affect sorghum include downy mildew, turcicum leaf blight, anthracnose and sorghum smuts (covered kernel smut, loose smut, long smut and head smuts). The pathogen population shows an extremely high genetic diversity in tropical and subtropical regions. Turcicum leaf blight of maize caused by the fungus Setosphaeria turcica is a serious foliar disease of maize distributed widely throughout the world and causing significant yield losses. Turcicum leaf blight of maize (Zea mays L.) caused by Exserohilum turcicum (Pass.) Helminthosporium ear rot (race 1) Cochliobolus carbonum. Northern leaf blight (NLB) caused by Exserohilum turcicum is a significant fungal disease of maize. Maize has the highest yield/ha among the cereal crops. 4 0 obj
The symptoms were observed at different stages of growth. Integrated management of turcicum leaf blight of maize caused by ⦠Turcicum leaf blight of maize caused by the fungus Setosphaeria turcica is a serious foliar disease of maize distributed widely throughout the world and causing significant yield losses. <>
Maize is affected by more than 60 diseases, of which 16 are major ones. The spots gradually increase in area into bigger elliptical spots and are straw to grayish brown in the centre with dark brown margins. Worldwide. Leonard and Suggs, was first reported by Passerini in 1876 from Perma, Italy. ���&���&�֧��3^.�yU)�~x��`aԔZ���E�OT�@M����� [I[+�aJv�l�Gh`(��*uB�j� ���va��.n������Ҧ�ы��r�����n��[�F��nGb��
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Northern corn leaf blight (NCLB) also known as Turcicum leaf blight of maize is major foliar disease and itâs a problematic to maize farmers in highland of Himalayan region, worldwide. caused the greatest effect on reducing the severity of northern leaf blight. Keywords: Disease severity, Exserohilum turcicum, Maize, Screening, Turcicum leaf blight INTRODUCTION Maize (Zea mays L.) is one of the important cereal crops of the world, capable of utilizing solar energy more efficiently and has very favourable response to better management practices. Helminthosporium turcicum Pass.) Eventually the growing lesions can lead to complete burning of the foliage. 1) Turcicum Leaf blight: Merle T. Jenkins. There are many races or strains of the fungus. %����
This paper presents identification of sources of Turcicum Leaf Blight (TLB) resistance in maize. 9.2.2.2 Leaf blight. Because the same pathogen can infect and cause major losses for two of the most important grain crops, it is an ideal pathosystem to study plant-pathogen evolution and investigate shared resistance mechanisms between the two plant species. Turcicum leaf blight on maize. Suggs. Turcicum leaf blight (Exserohilum turcicum) (TLB) is a major disease affecting maize (Zea mays) in western Ethiopia. endobj
INTRODUCTION aize is one of the important cereal crops and it is 3rd major crop in India after rice and wheat. Northern corn leaf blight (NLB) is caused by the fungus Exserohilum turcicum, previously classified as Helminthosporium turcicum. All the eight isolates of E. turcicum showed variability in respect to cultural and morphological characters. As temperatures rise in the spring and early summer, the fungus produces These start out as slightly oval, water-soaked, small spots, and may first appear on lower leaves. 1984; Leonard et al., Northern corn leaf blight (NCLB) caused by the hemibiotrophic fungus Exserohilum turcicum is an important foliar disease of maize that is mainly controlled by growing resistant maize cultivars. It overwinters as mycelia and conidia in diseased maize leaves, husks and other plant parts. is a major production constraint of maize crop in Karnataka. endobj
Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. Disease reduces quality and yield of maize. It has also been known as Helminthosporium turcicum. Using host resistance to minimize the detrimental effects of NCLB on maize productivity is the most cost-effective and appealing disease management strategy. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
Northern leaf blight caused by Exserohilum turcicum (Pass.) A study was carried out to identify the sources of resistance to Turcicum leaf blight (TLB) and polysora rust in maize. Leonard and E.G. TLB, caused by E. turcicum, is considered a serious disease where climatic conditions are cool with high relative humidity. Recurrent Selection as a Method for Concentrating Genes for Resistance to Helminthosporium turcicum Leaf Blight in Corn 1. 3 0 obj
The inbred mapping (IBM) population, an advanced inter-cross RIL population, derived from a cross between Mo17 and B73 lines, was evaluated for NLB resistance. Foliar application of different bacteria significantly reduced the leaf blight between 30-78% and 39-56% at 20 and 39 days respectively. ���O���ty~�ED- je�CPL�غ�a��^��z����� X��|�� ����@�� v�i� ��Z�:m�L�NJ��>��3����:�$~�'z�|��Ҝ��J ��m6+�hVJ�u������nWW�G�G7`���|�V��|4�
h��|�ԫ7� ���a*8�e�� Z>�l6�;�.���. KEY WORDS: Turcicum leaf blight, Maize, Exserohilum turcicum, Resistance, Susceptible, Nithyashree. Abstract. 1 0 obj
Northern corn leaf blight (NCLB), the most devastating leaf pathogen in maize (Zea mays L.), is caused by the heterothallic ascomycete Setosphaeria turcica. ¦LývöÏ!ÑAµ:¥`i?îëÍ>§½MUÄÛà#ßÇefîç÷ÝÇ7ÞYò¼.ʲ¸Û?'d¡ÂØeV}. Introduction. In Latvia, climatic factors are influential in spreading of the Northern leaf blight of maize caused by Setosphaeria turcica (SETOTU, anamorph Exserohilum turcicum, Helminthosporium turcicum). List of diseases of maize: 1) Turcicum Leaf blight. <>
Maize leaf blight, maize northern leaf blight. Turcicum leaf blight (TLB) is one of the most destructive foliar diseases of maize and sorghum. 9J�tYqD?�"��Z6��6
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2K��$+j�k+s�� Northern corn leaf blight (NCLB) is a foliar disease of corn (maize) caused by Exserohilum turcicum, the anamorph of the ascomycete Setosphaeria turcica. A total of seven isolates of E. turcicum from maize and one isolate of E. turcicum from sorghum were chosen for variability studies. Small yellowish round to oval spots are seen on the leaves. endobj
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