is a major production constraint of maize crop in Karnataka. Maize leaf showing elongated, spindle-shaped necrotic lesions caused by turcicum leaf blight (Setosphaeria turcica, anam. Eventually the growing lesions can lead to complete burning of the foliage. 3 0 obj
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2K��$+j�k+s�� There are many races or strains of the fungus. Disease reduces quality and yield of maize. The symptoms were observed at different stages of growth. 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. Suggs. Leaf blight - Helminthosporium maydis(Syn:H. turcicum) Symptoms The fungus affects the crop at young stage. 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. Northern corn leaf blight (NCLB), the most devastating leaf pathogen in maize (Zea mays L.), is caused by the heterothallic ascomycete Setosphaeria turcica. K.J. 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 was observed that in the V10 stage of maize plants, isolate 8 (Bacillus spp.) The most important diseases of maize in Nepal are leaf blights (turcicum and maydis leaf blight), ear rot, stalk rot, rust, downy mildews, etc. Maize is native of Mexico and Central America by origin, (Galaniant, 1976, Pursglove, 1972 and Dowswell et al., 1996). Foliar application of different bacteria significantly reduced the leaf blight between 30-78% and 39-56% at 20 and 39 days respectively. <>>>
1) Turcicum Leaf blight: This disease is popularly known as Northern Corn Leaf Bight (NCLB) in the United States of America. The pathogen population shows an extremely high genetic diversity in tropical and subtropical regions. Distribution. ¦LývöÏ!ÑAµ:¥`i?îëÍ>§½MUÄÛà#ßÇefîç÷ÝÇ7ÞYò¼.ʲ¸Û?'d¡ÂØeV}. 3) Charcoal rot. it is important to control diseases of maize which are mention below as it causes yield losses. Index Terms- Maize, turcicum leaf blight, Exserohilum turcicum, Mancozeb, Management I. Turcicum Leaf blight (TLB) of maize caused by Exserohilum turcicum (Pass.) Turcicum leaf blight of maize (Zea mays L.) caused by Exserohilum turcicum (Pass.) 9.2.2.2 Leaf blight. saff 0.25% recorded the lowest percent disease index (PDI) A study was carried out to identify the sources of resistance to Turcicum leaf blight (TLB) and polysora rust in maize. ���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�;�.���. TLB, caused by E. turcicum, is considered a serious disease where climatic conditions are cool with high relative humidity. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
2) Post flowering stalk rot. Turcicum leaf blight on maize. Abstract. Northern corn leaf blight (NCLB) is a foliar disease of corn (maize) caused by Exserohilum turcicum, the anamorph of the ascomycete Setosphaeria turcica. 1984; Leonard et al., All the eight isolates of E. turcicum showed variability in respect to cultural and morphological characters. ... Maize leaf fleck Maize leaf fleck virus (MLFV) Maize line* stream
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). Turcicum leaf blight (TLB) is one of the most destructive foliar diseases of maize and sorghum. Leonard and Suggs, was first reported by Passerini in 1876 from Perma, Italy. 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. KEY WORDS: Turcicum leaf blight, Maize, Exserohilum turcicum, Resistance, Susceptible, Nithyashree. Exserohilum turcicum is an important pathogen of both sorghum and maize, causing sorghum leaf blight and northern corn leaf blight. Leonard and E.G. INTRODUCTION Maize (Zea mays L.) is one of the important cereal crops and it is third major crop in India after rice and wheat. Maize leaf blight, maize northern leaf blight. 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�%%#��� Recurrent Selection as a Method for Concentrating Genes for Resistance to Helminthosporium turcicum Leaf Blight in Corn 1. ���&���&�֧��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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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. List of diseases of maize: 1) Turcicum Leaf blight. When infection occurs prior to and at silking and conditions are optimum, it may cause significant economic damage. 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). Leonard and Suggs (Syn. Helminthosporium turcicum Pass.) 2 0 obj
Scientific Name. endobj
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 (Exserohilum turcicum) (TLB) is a major disease affecting maize (Zea mays) in western Ethiopia. Severe losses in grain yield ranging from 25 to 90 per cent have been reported in India. 5)Downy mildew. The disease is favoured by mild temperature and high humidity (Ullstrup, 1970). Helminthosporium ear rot (race 1) Cochliobolus carbonum. Integrated management of turcicum leaf blight of maize caused by ⦠Northern leaf blight caused by Exserohilum turcicum (Pass.) Spores are produced on this crop residue when environmental conditions become favourable in the spring and early summer. 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. Northern corn leaf blight (NCLB) caused by Exserohilum turcicum is a destructive disease in maize. Maize is affected by more than 60 diseases, of which 16 are major ones. Northern leaf blight (NLB) caused by Exserohilum turcicum is a significant fungal disease of maize. It is prevalent in maize growing zones and considered to be very important in terms of its geographical distribution and potential to cause yield losses. %PDF-1.5
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Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. endobj
Northern corn leaf spot. With its characteristic cigar-shaped lesions, this disease can cause significant yield loss in susceptible corn hybrids. Maize has the highest yield/ha among the cereal crops. Sixty indigenous and exotic inbred lines were evaluated under artificial epiphytotic conditions at two identified hot spot locations, Almora and Nagenahalli. Merle T. Jenkins. Turcicum leaf blight (TLB) of maize caused by Exserohilum turcicum (Pass) Leonard. ([3, 20, 26, 33, 40, 44]). A total of seven isolates of E. turcicum from maize and one isolate of E. turcicum from sorghum were chosen for variability studies. Northern corn leaf blight (NLB) is caused by the fungus Exserohilum turcicum, previously classified as Helminthosporium turcicum. INTRODUCTION aize is one of the important cereal crops and it is 3rd major crop in India after rice and wheat. It overwinters as mycelia and conidia in diseased maize leaves, husks and other plant parts. 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. 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. The spots gradually increase in area into bigger elliptical spots and are straw to grayish brown in the centre with dark brown margins. %����
This paper presents identification of sources of Turcicum Leaf Blight (TLB) resistance in maize. It has also been known as Helminthosporium turcicum. Turcicum leaf blight (or northern leaf blight) occurs worldwide and particularly in areas where high humidity and moderate temperatures prevail during the growing season. 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. 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. Introduction. Varietal resistance is the most efficient technique to control NCLB. caused the greatest effect on reducing the severity of northern leaf blight. 1 0 obj
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