scholarly journals Seed-Borne Fungal Diseases of Maize (Zea mays L.): A Review

2021 ◽  
Vol 4 (1) ◽  
pp. 43-60
Author(s):  
Fazal Ur Rehman ◽  
Muhammad Adnan ◽  
Maria Kalsoom ◽  
Nageen Naz ◽  
Muhammad Ghayoor Husnain ◽  
...  
Keyword(s):  
Zea Mays ◽  
Fungal Pathogens ◽  
Integrated Management ◽  
Macrophomina Phaseolina ◽  
Fungal Diseases ◽  
Production Costs ◽  
Leaf Spot Disease ◽  
Colletotrichum Graminicola ◽  
Management Options ◽  
Blight Disease

Introduction: Maize (Zea mays) is one of the most important cereal crops. It is ranked as 3rd after wheat and rice. Due to its wide adaptability, diversified uses, and low production costs, it has great potential as a cereal crop. In the case of yield losses, various factors are involved. The fungal diseases of maize play a significant role in the reduction of both quantity as well as the quality of maize. Review Results: At the seedling stage, maize suffers from numerous diseases and many of them are seed-borne diseases. Anthracnose stalk rot (Colletotrichum graminicola), Charcoal rot of maize (Macrophomina phaseolina), Crazy top downy mildew disease (Sclerophthora macrospora), Corn grey leaf spot disease (Cercospora zeae-maydis), Aspergillus ear and kernel rot (Aspergillus flavus), Corn smut (Ustilago maydis), Southern corn leaf blight disease (Bipolaris maydis) etc. are important among these diseases.Chemical control of seed-borne pathogens of maize is rather difficult to achieve as a reasonably good. Due to the hazardous environmental effects of chemicals, the Integrated Management of the seed-borne fungal pathogens of corn is mostly preferred. The distribution, disease cycle, symptoms of the damage, effects of environmental factors, economical importance of disease, and integrated disease management options of major seed-borne fungal pathogens of maize have been reviewed in this review article from various currently available sources.

scholarly journals Isolation and Characterization of Locally Isolated Jute Fungi and Determination of their Pathogenicity

2019 ◽  
Vol 35 (1) ◽  
pp. 67-73
Author(s):  
Md Abul Kashem ◽  
Md Towhid Hossain ◽  
MN Anwar
Keyword(s):  
Fungal Pathogens ◽  
Dominant Role ◽  
Market Price ◽  
Agar Plate ◽  
Macrophomina Phaseolina ◽  
Labor Cost ◽  
Fungal Diseases ◽  
Isolation And Characterization ◽  
Number Of Factors

Currently Jute farmer faces a number of problems in jute sector such as higher labor cost, fungal diseases, low market price, natural disasters etc. As a result the production of jute is far below than the desired figure. The severe yield lost of jute depends on a number of factors of which fungal diseases play a dominant role. In the present investigation 56 samples of infected jute plants were collected from 8 (Eight) different area of Bangladesh and the samples were investigated by Agar plate and Blotter methods. Symptoms of diseases were recorded and associated fungal pathogens were purified and characterized. Based on cultural and morphological characterizations three fungal pathogens were identified as Botryodiplodia theobromae Pat. (Griffon & Maubl.), Colletotrichum corchori (Ikata and Yoshida) and Macrophomina phaseolina (Tassi) Goid and allthe isolates showed their pathogenicity on jute plants. Bangladesh J Microbiol, Volume 35 Number 1 June 2018, pp 67-73

scholarly journals Resistance Breeding Increases Winter Wheat Gross Margins–An Economic Assessment for Germany

2021 ◽  
Vol 3 ◽  
Author(s):  
Sophia Lüttringhaus ◽  
Holger Zetzsche ◽  
Benjamin Wittkop ◽  
Andreas Stahl ◽  
Frank Ordon ◽  
...  
Keyword(s):  
Disease Management ◽  
Winter Wheat ◽  
Fungal Pathogens ◽  
Resistance Breeding ◽  
Field Trials ◽  
Production Costs ◽  
Economic Losses ◽  
Management Options ◽  
Wheat Production ◽  
Gross Margins

Improved wheat varieties have ameliorated our food production. Intensive cropping systems, as in Germany, achieve very high grain yields and thus contribute greatly to global food security. As diseases, especially fungal pathogens, pose major threats in winter wheat production, disease management is crucial to uphold high production levels and to avoid economic losses. Yet, the economic value of breeding varieties with increased resistance to fungal pathogens has not been analyzed with comprehensive data. Our analysis fills this gap by quantifying the economic effects of 50 years of resistance breeding for winter wheat production in Germany. Based on field trials and agronomic production data, we analyze how resistances have influenced the economic profitability of the crops. Thereby, we can isolate the pure breeding-induced effects of increased resistance to fungal pathogens, which cause leaf and stripe rust, powdery mildew, and Fusarium head blight. We calculated the gross margins of 176 varieties according to nitrogen and fungicide applications in field trials. Regression models show that resistance breeding had a strong positive and statistically significant effect on the gross margins of the varieties. In comparison, the specific meta-environment of the season had a larger effect, while the effect of high nitrogen as well as fungicide treatments was lower. The gross margin increased over time along with higher resistances. Simultaneously, the difference in gross margins between the fungicide-treated and untreated variants decreased, indicating an increased contribution of resistances to yield stability. Resistances have increased gross margins greatly, as the health levels of varieties remain high without the need for fungicide applications and thus production costs can be saved. We conclude that resistance breeding has increased the economic profitability and sustainability of crop production due to a reduction in the costs for fungicides. In fields of farmers, these positive effects of resistance breeding can be fully realized by an optimal variety choice and a variety- and situation-specific disease management. Such an agronomic practice would not only further improve winter wheat gross margins but also mitigate some of the pressures on agricultural productions, such as reduced disease management options and adverse climate change impacts.

scholarly journals In Vitro and In Vivo Antifungal Activity of Sorbicillinoids Produced by Trichoderma longibrachiatum

2021 ◽  
Vol 7 (6) ◽  
pp. 428
Author(s):  
Men Thi Ngo ◽  
Minh Van Nguyen ◽  
Jae Woo Han ◽  
Myung Soo Park ◽  
Hun Kim ◽  
...  
Keyword(s):  
Late Blight ◽  
Culture Filtrate ◽  
Fungal Pathogens ◽  
Gray Mold ◽  
Trichoderma Longibrachiatum ◽  
Chemical Structures ◽  
Natural Agents ◽  
Blight Disease

In the search for antifungal agents from marine resources, we recently found that the culture filtrate of Trichoderma longibrachiatum SFC100166 effectively suppressed the development of tomato gray mold, rice blast, and tomato late blight. The culture filtrate was then successively extracted with ethyl acetate and n-butanol to identify the fungicidal metabolites. Consequently, a new compound, spirosorbicillinol D (1), and a new natural compound, 2′,3′-dihydro-epoxysorbicillinol (2), together with 11 known compounds (3–13), were obtained from the solvent extracts. The chemical structures were determined by spectroscopic analyses and comparison with literature values. The results of the in vitro antifungal assay showed that of the tested fungal pathogens, Phytophthora infestans was the fungus most sensitive to the isolated compounds, with MIC values ranging from 6.3 to 400 µg/mL, except for trichotetronine (9) and trichodimerol (10). When tomato plants were treated with the representative compounds (4, 6, 7, and 11), bisvertinolone (6) strongly reduced the development of tomato late blight disease compared to the untreated control. Taken together, our results revealed that the culture filtrate of T. longibrachiatum SFC100166 and its metabolites could be useful sources for the development of new natural agents to control late blight caused by P. infestans.

scholarly journals Organic Farming and Cover-Crop Management Reduce Pest Predation in Austrian Vineyards

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 220
Author(s):  
Jo Marie Reiff ◽  
Sebastian Kolb ◽  
Martin H. Entling ◽  
Thomas Herndl ◽  
Stefan Möth ◽  
...  
Keyword(s):  
Organic Farming ◽  
Pest Control ◽  
Cover Crops ◽  
Cover Crop ◽  
Management Practices ◽  
Integrated Management ◽  
Lobesia Botrana ◽  
Management Options ◽  
Natural Pest Control ◽  
Predation Rates

Habitat simplification and intensive use of pesticides are main drivers of global arthropod declines and are, thus, decreasing natural pest control. Organic farming, complex landscapes, and local vineyard management practices such as implementation of flower-rich cover-crop mixtures may be a promising approach to enhance predator abundance and, therefore, natural pest control. We examined the effect of organic versus integrated management, cover-crop diversity in the vineyard inter-rows, and landscape composition on the natural pest control of Lobesia botrana eggs and pupae. Predation of L. botrana pupae was reduced by organic farming and species-poor cover-crops by about 10%. Predation rates of L. botrana eggs did not differ significantly in any of the studied management options. Dominant predators were earwigs (Forficulidae), bush crickets (Tettigoniidae), and ants (Formicidae). Negative effects of organic viticulture are most likely related to the negative nontarget effects on arthropods related to the frequent sulfur and copper applications in combination with the avoidance of strongly damaging insecticides by integrated winegrowers. While a 10% difference in predation rates on a single pest stage is unlikely to have strong practical implications, our results show that the assumed effectiveness of environmentally friendly agriculture needs to be evaluated for specific crops and regions.

scholarly journals Agro-Economic Evaluation of Alternative Crop Management Options for Teff Production in Midland Agro-Ecology, Ethiopia

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 298
Author(s):  
Fekremariam Asargew Mihretie ◽  
Atsushi Tsunekawa ◽  
Nigussie Haregeweyn ◽  
Enyew Adgo ◽  
Mitsuru Tsubo ◽  
...  
Keyword(s):  
Management Practices ◽  
Smallholder Farmers ◽  
Early Stage ◽  
Crop Management ◽  
Production Costs ◽  
Agronomic Performance ◽  
Labor Costs ◽  
Management Options ◽  
Area Index ◽  
Weed Population

Teff is an important crop for smallholder farmers in Ethiopia. Improved crop management practices are needed to increase teff productivity and decrease production costs. Here, we used a split–split plot design to evaluate the impacts of different tillage, sowing, and soil compaction practices, and their combinations, on agronomic performance, weed population, lodging, and cost in teff production at the Aba Gerima watershed in northwestern Ethiopia in 2018–2020. Reduced tillage (RT) improved soil moisture, resulting in increased agronomic performance and decreased production costs compared with conventional tillage (CT); however, the weed population was substantially larger with RT than with CT. Row planting (RP) reduced seed cost and lodging but increased sowing and weeding costs compared with broadcast planting (BP). Plant population and leaf area index were substantially greater with BP than with RP during early-stage growth, but this reversed during late-stage growth. Despite labor costs being significantly greater with (WC) compaction than without (NC), little to no differences were observed in the weed population or in agronomic performance. Partial cost–benefit analysis revealed that RT–RP–WC followed by RT–RP–NC was the most economical treatment combination, suggesting that RT–RP–NC could be a labor-effective means of increasing teff production by smallholder farms in Ethiopia.

scholarly journals Peach Brown Rot: Still in Search of an Ideal Management Option

Agriculture ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 125 ◽  
Author(s):  
Vitus Ikechukwu Obi ◽  
Juan José Barriuso ◽  
Yolanda Gogorcena
Keyword(s):  
Fungal Pathogens ◽  
Crop Production ◽  
Control Strategies ◽  
Brown Rot ◽  
Management Option ◽  
Management Options ◽  
Pests And Diseases ◽  
Resistant Varieties ◽  
Rot Disease ◽  
Post Harvest Loss

The peach is one of the most important global tree crops within the economically important Rosaceae family. The crop is threatened by numerous pests and diseases, especially fungal pathogens, in the field, in transit, and in the store. More than 50% of the global post-harvest loss has been ascribed to brown rot disease, especially in peach late-ripening varieties. In recent years, the disease has been so manifest in the orchards that some stone fruits were abandoned before harvest. In Spain, particularly, the disease has been associated with well over 60% of fruit loss after harvest. The most common management options available for the control of this disease involve agronomical, chemical, biological, and physical approaches. However, the effects of biochemical fungicides (biological and conventional fungicides), on the environment, human health, and strain fungicide resistance, tend to revise these control strategies. This review aims to comprehensively compile the information currently available on the species of the fungus Monilinia, which causes brown rot in peach, and the available options to control the disease. The breeding for brown rot-resistant varieties remains an ideal management option for brown rot disease control, considering the uniqueness of its sustainability in the chain of crop production.

Fresh-cut apples: Challenges and opportunities for multi-disciplinary research

2006 ◽  
Vol 86 (Special Issue) ◽  
pp. 1361-1368 ◽  
Author(s):  
Peter M. A. Toivonen
Keyword(s):  
Value Chain ◽  
Fungal Pathogens ◽  
Value Added ◽  
Research Strategy ◽  
Production Costs ◽  
Food Microbiology ◽  
Research Activities ◽  
Industry Practice ◽  
Emerging Issues ◽  
Fresh Cut

The fresh-cut apple industry has recently become established in North America. The future looks very bright for this value-added fruit product, however its growth requires improvements in quality and reduction of production costs. The existing industry has grown from concept to reality in response to research activities in anti-browning dips, package technology, sensory analysis, postharvest physiology, postharvest pathology and food microbiology. Several examples of how these critical research inputs have impacted and continue to impact on the industry practice are discussed. The next generation of questions and challenges posed by the industry will require some new inputs. Research in several disciplines will be need accessed to resolve the emerging issues. Traditional breeding effort and/or molecular technologies will be needed to provide non-browning fruit, fruit with better processing characteristics such as small cores to reduce waste and improved flavour and nutrition retention after cutting. With new cultivars, further work will be required to understand the commercial handling of each, including selection of harvest maturity and optimization of storage protocols. Also, pre-harvest factors such as phosphorus nutrition will need to be investigated further in terms of their effects on fruit tissue and membrane stability. Management of fungal pathogens is a key issue that needs to be studied from the field through storage and after cutting and packaging of the sliced fruit. The very nature of fresh-cut fruit has and continues to require a coordinated multi-disciplinary research strategy. Key words: Value-chain, value-added, apples, fresh-cut, integrated research

scholarly journals The emergence of cereal fungal diseases and the incidence of leaf spot diseases in Finland

2008 ◽  
Vol 20 (1) ◽  
pp. 62 ◽  
Author(s):  
M. JALLI ◽  
P. LAITINEN ◽  
S. LATVALA
Keyword(s):  
Spring Wheat ◽  
Leaf Spot ◽  
Fungal Pathogens ◽  
Plant Pathogens ◽  
Field Survey ◽  
Fungal Diseases ◽  
Cochliobolus Sativus ◽  
Pyrenophora Tritici Repentis ◽  
Fungal Plant Pathogens ◽  
First Time

Fungal plant pathogens causing cereal diseases in Finland have been studied by a literature survey, and a field survey of cereal leaf spot diseases conducted in 2009. Fifty-seven cereal fungal diseases have been identified in Finland. The first available references on different cereal fungal pathogens were published in 1868 and the most recent reports are on the emergence of Ramularia collo-cygni and Fusarium langsethiae in 2001. The incidence of cereal leaf spot diseases has increased during the last 40 years. Based on the field survey done in 2009 in Finland, Pyrenophora teres was present in 86%, Cochliobolus sativus in 90% and Rhynchosporium secalis in 52% of the investigated barley fields. Mycosphaerella graminicola was identified for the first time in Finnish spring wheat fields, being present in 6% of the studied fields. Stagonospora nodorum was present in 98% and Pyrenophora tritici-repentis in 94% of spring wheat fields. Oat fields had the fewest fungal diseases. Pyrenophora chaetomioides was present in 63% and Cochliobolus sativus in 25% of the oat fields studied.;

scholarly journals IDENTIFICATION OF BACTERIAL WILT AND LEAF BLIGHT DISEASE ON MAIZE (Zea mays) FOUND IN KEDIRI, INDONESIA

2013 ◽  
Vol 35 (2) ◽  
Author(s):  
Luqman Qurata Aini ◽  
Lilis Suryani ◽  
Arifin Noor Sugiharto ◽  
Abdul Latief Abadi
Keyword(s):  
Zea Mays ◽  
Bacterial Wilt ◽  
Leaf Blight ◽  
Blight Disease
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