scholarly journals Еvaluation the efficiency of chemical and biological preparations interaction for pre-seed treatment of soybean

2021 ◽  
Author(s):  
M. Selinny ◽  
O. Tertychna ◽  
G. Ryabukha ◽  
N. Yeremenko ◽  
D. Buturlim
Keyword(s):  
Seed Treatment ◽  
Local Population ◽  
Soybean Seed ◽  
Additional Treatment ◽  
Nodule Bacteria ◽  
Negative Effects ◽  
Hydrothermal Conditions ◽  
Soybean Plants ◽  
Effective Development ◽  
Chemical Pesticides

The presented study is based on the need for joint use of chemical and biological products for the effective development of agriculture and cultivation of legumes in particular. The influence of inoculation and chemical pesticides on the processes of growth, development and formation of soybean seed yield has been studied, morphological features of soybean plants have been revealed; the influence of chemical pesticides and bacterial preparations on the development and productivity of soybeans, taking into account hydrothermal conditions, has been researched. The authors have analyzed peculiarities of Kofu soybean productivity formation, depending on inoculation with preparations based on specific nodule bacteria B. japonicum Rizolik Top with Premax protector, HighCot Super + HighCot Super Extender, Optimize and chemical pesticides Sistiva and Gaucho Plus in Polissya area of Chernihiv region. It has been experimentally proventhat the use of Rizolik Top inoculant with Premax protector and additional treatment with Sistiva and Gaucho Plus chemicals, even in the presence of a local population of nodule bacteria, provided an increase in yield, in the number of active nodules and plant height. The influence of lack of sufficient moisture and high air temperatures on the symbiosis of the root system of soybeans with nodule bacteria, which leads to a decrease in grain yield and quality has been determined. The influence of inoculants on increasing the productivity of symbiotic soybean-rhizobial systems under the action of adverse environmental conditions has been proved. The specificity of the soil-climatic zone, varietal characteristics of plants and the level of agriculture inherent in the economy confirm the importance of the research conducted for agroecology. It’s recommended to focus the prospects for further research on the use of higher doses of inoculants in seed treatment to avoidthe risk of reducing the effectiveness of microbial drugs due to the negative effects of chemical pesticides.

scholarly journals Comparative analysis of inoculated soybean in extinguishing soil

2017 ◽  
pp. 113-116
Author(s):  
Nikoletta Nagy ◽  
Péter Pepó ◽  
Lajosné Mándi
Keyword(s):  
Comparative Analysis ◽  
Seed Treatment ◽  
Soybean Seed ◽  
Nodule Formation ◽  
Bacterial Strains ◽  
Negative Effects ◽  
Soil Suspension ◽  
Core Saturation ◽  
Soybean Nodule ◽  
Technological Methods

In order to achieve higher yields, better technological methods offered in the current market, which aims to help the producers in the realization. To guarantee good yield because more and more people try with a variety of products, but you have to make the expected impact falls short.In this experiment, the following results were obtained: the soil suspension closely related to the inoculum of seed or seed treatment,which affects the soybean nodule formation, core saturation, and yield and protein-oil indicators. The soil suspension composition may exert positive and negative effects, which depend on how bacterial strains inoculum combined on the soybean seed surface. It is shown in our experiment very well, that between inoculum and inoculum as well as inoculum and seed treatment materials may be antagonism which setback to the soybean nodules formation and the yield, but not worsen the protein-oil indicators.

On-Farm Soybean Seed Treatment Trials

2015 ◽  
Author(s):  
Jim Fawcett ◽  
Zack Koopman ◽  
Lance Miller ◽  
Wayne Roush ◽  
Josh Sievers
Keyword(s):  
Seed Treatment ◽  
Soybean Seed ◽  
Treatment Trials ◽  
On Farm

Tyrosol, a phenolic compound from Phomopsis sp., is a potential biostimulant in soybean seed treatment

2021 ◽  
Vol 43 ◽  
pp. 40-44
Author(s):  
Geraldo Humberto Silva ◽  
Josiane Abadia Resende de Souza ◽  
Willian Rodrigues Macedo ◽  
Frederico Garcia Pinto
Keyword(s):  
Phenolic Compound ◽  
Seed Treatment ◽  
Soybean Seed

scholarly journals Seed treatment for management of Meloidogyne javanica in soybean

2017 ◽  
Vol 38 (5) ◽  
pp. 2995 ◽  
Author(s):  
Adriely Alves de Almeida ◽  
Vinicius Hicaro Frederico Abe ◽  
Ricardo Marcelo Gonçalves ◽  
Maria Isabel Balbi-Peña ◽  
Débora Cristina Santiago
Keyword(s):  
Seed Treatment ◽  
Meloidogyne Javanica ◽  
Vitro Assay ◽  
Juvenile Mortality ◽  
Second Stage ◽  
Final Population ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Soybean Plants

The objective of this study was to evaluate the efficacy of the active ingredient abamectin, either in isolation or in combination with fungicides and insecticides formulated for the industrial seed treatment, on the population of Meloidogyne javanica, tested under greenhouse and in vitro conditions. In both tests, the combination of the following treatments was assessed: abamectin; thiamethoxam; fludioxonil + metalaxyl-M + thiabendazole. Water was used as control for the in vitro assay, whereas under greenhouse conditions, controls were inoculated and not inoculated with M. javanica. The tests were conducted in a completely randomized design with six (in vitro) and ten (greenhouse) replicates. For in vitro studies the effect on hatching, motility, and mortality of juveniles of M. javanica was evaluated. Under greenhouse conditions, the soybean ‘BRS 133’ seeds were treated, and at 15, 30, and 60 days after inoculation (DAI) with M. javanica, plant measurements were recorded. The penetration of second stage juveniles (J2) was also evaluated at 15 DAI. At 30 DAI, galls, egg masses, nematodes/g of root, and final population were evaluated. At 60 DAI, the final population of nematodes in the roots was quantified. The treatments containing abamectin were the most effective in diminishing the hatching of juveniles. All treatments had an effect on nematode motility when compared to the control, and in the treatment containing only abamectin, total juvenile mortality was observed. In greenhouse conditions, at 15 DAI, the treated soybean plants had the highest root mass and shoot length, differing statistically from the inoculated control. All treatments reduced the number of nematodes per gram of root, differing from the control. At 30 DAI, treatment efficiency was observed in reducing the final population of M. javanica, particularly the treatments using abamectin, and abamectin + thiamethoxam + fludioxonil + metalaxyl-M + thiabendazole. However, at 60 DAI, the effect of the treatments on the population of M. javanica did not persist.

scholarly journals Micropollutant-loaded powdered activated carbon released from waste water treatment plants: a risk for sediment-dwelling organisms?

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Marion Woermann ◽  
Julios Armand Kontchou ◽  
Bernd Sures
Keyword(s):  
Activated Carbon ◽  
Wastewater Treatment Plants ◽  
Water Cycle ◽  
Waste Water Treatment ◽  
Additional Treatment ◽  
Powdered Activated Carbon ◽  
Lumbriculus Variegatus ◽  
Negative Effects ◽  
Global Water Cycle ◽  
Receiving Waters

Abstract Background In order to protect aquatic environments and to reduce the presence of micropollutants in the global water cycle, wastewater treatment plants (WWTPs) often implement an additional treatment step. One of the most effective measures is the use of powdered activated carbon (PAC) as an adsorbent for micropollutants. This method provides sufficient elimination rates for several micropollutants and has been successfully employed in many WWTPs. Despite this success, there might be a drawback as the retention of the PAC in the WWTP can be challenging and losses of micropollutant-loaded PAC into the aquatic environment may occur. Upon emission, micropollutant-loaded PAC is expected to settle to the benthic zone of receiving waters, where sediment-dwelling organisms may ingest these particles. Therefore, the present study investigated possible adverse effects of micropollutant-loaded PAC from a WWTP as compared to unloaded (native) and diclofenac-loaded PAC on the sediment-dwelling annelid Lumbriculus variegatus. Results Native PAC induced the strongest effects on growth (measured as biomass) and reproduction of the annelids. The corresponding medium effective concentrations (EC50) were 1.7 g/kg and 1.8 g/kg, respectively. Diclofenac-loaded PAC showed lower effects with an EC50 of 2.5 g/kg for growth and EC50 of 3.0 g/kg for reproduction. Although tested at the same concentrations, the micropollutant-loaded PAC from the WWTP did not lead to obvious negative effects on the endpoints investigated for L.variegatus and only a slight trend of a reduced growth was detected. Conclusion We did not detect harmful effects on L. variegatus caused by the presence of MP-loaded PAC from a WWTP which gives an auspicious perspective for PAC as an advanced treatment option.

scholarly journals First Report of Sudden Death Syndrome (Fusarium solani f. sp. glycines) of Soybean in Minnesota

Plant Disease ◽  
2003 ◽  
Vol 87 (4) ◽  
pp. 449-449 ◽  
Author(s):  
J. E. Kurle ◽  
S. L. Gould ◽  
S. M. Lewandowski ◽  
S. Li ◽  
X. B. Yang
Keyword(s):  
Sudden Death ◽  
Fusarium Solani ◽  
Growth Stage ◽  
Soybean Seed ◽  
Sudden Death Syndrome ◽  
South Central ◽  
Soil Temperatures ◽  
Glycine Max L ◽  
Pathogenicity Tests ◽  
Soybean Plants

In August 2002, soybean (Glycine max (L.) Merr.) plants exhibiting foliar and root symptoms typical of sudden death syndrome were observed in Blue Earth and Steele counties in south-central Minnesota. Leaf symptoms ranging from small chlorotic spots to prominent interveinal necrosis were present on soybean plants at the R6 to R7 growth stage. As plants matured, complete defoliation took place with only petioles remaining. Symptomatic plants had necrotic secondary roots, truncated taproots, and discolored cortical tissue at the soil line. Blue sporodochia containing macroconidia were observed on the taproot of affected plants at both locations (3,4). Multiple cultures from both locations were obtained by transferring macroconidia from the sporodochia to potato dextrose agar (PDA) and modified Nash-Snyder Medium (NSM) (3). After 14 days, isolations were made from fungal colonies exhibiting bluish pigmentation and masses of bluish macroconidia (4). The isolates grew slowly, developed a bluish color, and formed sporodochia containing abundant macroconidia on NSM. These isolates were identified as Fusarium solani (Mart.) Sacc. f. sp. glycines based on colony characteristics and morphology of macroconidia (2). Pathogenicity tests were conducted with a single isolate from each location. The isolate from Blue Earth County was inoculated as mycelia in a plug of media onto taproots of plants of susceptible cvs. Williams 82 and Spencer at the V2 growth stage. Chlorotic spots appeared on leaves after 12 days of growth at 22 to 25°C in the greenhouse. Interveinal necrosis appeared after 15 days (4). The isolate from Steele County was used to inoculate the susceptible cv. Great Lakes 3202. Sorghum seed (3 cm3) infested with mycelia of the isolate were placed 2 to 3 cm below soybean seed planted in Cone-Tainers. Noninfested sorghum seed was used as a control. Plants were maintained for 21 days at 22 to 28°C in the greenhouse. Chlorotic spots appeared on leaves of inoculated plants within 21 days after planting followed by the development of interveinal chlorosis and necrosis (1). Molecular analysis further supported the identification of the Steele County isolate as F. solani f. sp. glycines. Polymerase chain reaction with specific primers Fsg1 and Fsg2 of total genomic DNA extracted from the Steele County isolate amplified a 438-bp DNA fragment identical with that extracted from previously identified isolates of F. solani f. sp. glycines (1). In 2002, symptoms of sudden death syndrome were also reported in Olmsted, Freeborn, and Mower counties. Although studies are needed to determine the distribution of sudden death syndrome in the state, the occurrence of the symptoms at multiple locations suggests that F. solani f. sp. glycines is widely distributed in southeast and south-central Minnesota. The counties where sudden death syndrome symptoms were reported are located in the most productive soybean-growing region of Minnesota. Sudden death syndrome could be a serious threat to soybean production in this area since poorly drained, heavy, clay soils are common, and soil temperatures 18°C or less are normal before the end of May. References: (1) S. Li et al. Phytopathology 90:491, 2000. (2) K. W. Roy. Plant Dis. 81:566, 1997. (3) K. W. Roy et al. Plant Dis. 81:1100, 1997. (4) K. W. Roy. Plant Dis. 81:259, 1997.

scholarly journals SENSIBILIDADE DE PLANTAS DE SOJA AO REBAIXAMENTO DO NÍVEL FREÁTICO

Irriga ◽  
2005 ◽  
Vol 10 (2) ◽  
pp. 135-145
Author(s):  
Jocelito Saccol de Sá ◽  
Décio Eugênio Cruciani ◽  
Sérgio Nascimento Duarte ◽  
José Roberto Brito Pereira
Keyword(s):  
Soil Water ◽  
Water Table ◽  
Sao Paulo ◽  
Additional Treatment ◽  
Statistical Experimental Design ◽  
São Paulo ◽  
Level Control ◽  
Drainage Rate ◽  
Water Logging ◽  
Soybean Plants

SENSIBILIDADE DE PLANTAS DE SOJA AO REBAIXAMENTO DO NÍVEL FREÁTICO  Jocelito Saccol de Sá; Décio Eugênio Cruciani; Sérgio Nascimento Duarte; José Roberto Brito PereiraDepartamento de Engenharia Rural, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo,  Piracicaba - SP, [email protected].  1.      RESUMO A diversificação de culturas em terras baixas é de grande interesse em diversas regiões produtoras de arroz, no Brasil e no exterior. O cultivo de soja é uma opção economicamente viável para a ocupação dessas áreas em rotação e/ou em sucessão à orizicultura. Este trabalho foi realizado em casa de vegetação localizada em uma área experimental da ESALQ/USP, Piracicaba – SP, com o objetivo de avaliar os efeitos de rebaixamentos sucessivos do nível freático (NF) no desenvolvimento e na produtividade de plantas de soja, cv. BR-16, e identificar o estádio de desenvolvimento da cultura com maior sensibilidade à inundação do solo. O delineamento utilizado foi o inteiramente casualizado, em arranjo fatorial (2x5) com um tratamento adicional (testemunha), sendo os fatores estudados: período de desenvolvimento da cultura durante a inundação do solo (estádios V8 e R4) e rebaixamento do NF (10, 20, 30, 40 e 60 cm dia-1). As plantas de soja apresentaram maior suscetibilidade à inundação do solo durante o período vegetativo. As taxas de rebaixamento do NF influenciaram o desenvolvimento e a produtividade dessa cultura. O aumento da velocidade de drenagem reduziu os danos ocasionados às plantas pelo excesso de água no solo, principalmente no estádio menos tolerante a essa condição. UNITERMOS: inundação, coeficiente de drenagem.  SÁ, J. S.; CRUCIANI, D. E.; DUARTE, S. N. E PEREIRA, J. R. B. SENSITIVITY OF SOYBEAN PLANTS TO WATER TABLE DRAWDOWN   2 ABSTRACT Agricultural diversification in low lands is very important in several Brazilian regions and countries, especially in irrigated rice lands. Soybean is a viable economic option for low lands. This study was carried out in an experimental area at ESALQ/USP, Piracicaba, São Paulo – Brazil. The objectives were to estimate the effects of water table drawdown in the growth and crop yield of soybean cv. BR-16 and to identify the most sensitive crop stages to soil water logging. The statistical experimental design was a completely randomized one with factorial arrangement (2x5) one additional treatment (control) and four replications. The study was done in the V8 e R4 crop stages. The water table was lowered 10, 20, 30, 40 and 60cm per day, from initial level. Control plants where only irrigated without flooding. The soybean plants showed highest susceptibility to soil water logging in the vegetative stage. The water table drawdown rates influenced the development and productivity of soybean plants. The drainage rate increase reduced the damage caused to the plants by the water excess in the soil, mainly in the less tolerant stage. KEYWORDS: flooding, drainage coefficient.

scholarly journals Monitoring Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) Infestation in Soybean Using Hyperspectral Remote Sensing

2020 ◽  
Author(s):  
Pedro P. S. Barros ◽  
Inana X. Schutze ◽  
Fernando H. Iost Filho ◽  
Pedro Takao Yamamoto ◽  
Peterson Fiorio ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Bemisia Tabaci ◽  
Insect Pest ◽  
Remote Sensing Data ◽  
Management Program ◽  
Hyperspectral Remote Sensing ◽  
Negative Effects ◽  
Soybean Plants ◽  
Soybean Leaves ◽  
Different Levels

Although monitoring and observing insect pest populations in the fields is essential in crop management, it is still a laborious and sometimes ineffective process. High infestation levels may diminish the photosynthetic activity of soybean plants, affecting their development and reducing the yield. An imprecise decision making in integrated pest management program may lead to an ineffective control in infested areas or the excessive use of insecticides. In order to reach a more efficient control of arthropods population it is important to evaluate the infestation in time to mitigate its negative effects on the crop and remote sensing is an important tool for monitoring. It was proposed that infested soybean areas could be identified, and the arthropods quantified from non-infested areas in a field by hyperspectral remote sensing. Thus, the goals of this study were to investigate and discriminate the reflectance characteristics of soybean non-infested and infested with Bemisia tabaci using hyperspectral remote sensing data. Therefore, samples of infested and non-infested soybean leaves were collected and transported to the laboratory to obtain the hyperspectral curves. The results obtained allowed to discriminate the different levels of infestation and to separate healthy from whitefly infested soybean leaves based on their reflectance.

Soybean seed coat cup unloading on plants with low-raffinose, low-stachyose seeds

2009 ◽  
Vol 19 (3) ◽  
pp. 145-153 ◽  
Author(s):  
Suzanne M. Kosina ◽  
Alexander Castillo ◽  
Steven R. Schnebly ◽  
Ralph L. Obendorf
Keyword(s):  
Seed Coat ◽  
Soybean Seed ◽  
Soluble Carbohydrates ◽  
Growth Stages ◽  
In Planta ◽  
Plant Growth Stages ◽  
Soybean Plants ◽  
Soybean Seed Coat ◽  
Relationship Of ◽  
The Relationship

AbstractSucrose, raffinose and stachyose accumulate in soybean [Glycine max L. (Merrill)] embryos during seed maturation. To determine the relationship of plant maternal composition on seed composition, soluble carbohydrates in three 1-cm2 leaf punches at three plant growth stages (R2, R3, R6) and in seed coat cup exudates in planta were analysed at four 30-min intervals on soybean plants (R5) with low-raffinose, low-stachyose (LRS) seeds expressing the mutant stc1 phenotype; low-raffinose, low-stachyose and low-phytin (LRSP1, LRSP2) seeds expressing the mutant mips phenotype; or normal raffinose, stachyose and phytin (CHECK) seeds expressing the Stc1 and Mips phenotype. Leaf sucrose (23.6 μg cm− 2), myo-inositol (9.3 μg cm− 2), d-chiro-inositol (6.7 μg cm− 2), d-ononitol (0.76 μg cm− 2), d-pinitol (50.1 μg cm− 2) and total soluble carbohydrates (107.1 μg cm− 2) were not significantly different between phenotypes. d-chiro-Inositol, myo-inositol, d-pinitol and sucrose were unloaded from soybean seed coat cups in planta at decreasing rates over the four sequential periods of sampling. Unloading rates of sucrose and myo-inositol were highest for LRS, d-pinitol was highest for LRSP2, and d-chiro-inositol was not different between LRS, LRSP1, LRSP2 and CHECK. Free cyclitols were 60% of total soluble carbohydrates in leaves and 20% in seed coat cup exudates. Except for sucrose and d-pinitol, seed phenotype had little influence on the composition of compounds unloaded from seed coats to maturing embryos of low-raffinose, low-stachyose seeds. Maternally supplied cyclitols may contribute, in part, to changes in the composition of cyclitol galactosides stored in mature seeds.

scholarly journals Adhesion of uredospores of Phakopsora pachyrhizi on soybean seeds and their viability during storage

2012 ◽  
Vol 34 (2) ◽  
pp. 225-230
Author(s):  
Elisandra Batista Zambenedetti Magnani ◽  
Elisabeth Aparecida Furtado de Mendonça ◽  
Maria Cristina de Figueiredo e Albuquerque
Keyword(s):  
Soybean Seed ◽  
Germination Percentage ◽  
Time Span ◽  
Soybean Seeds ◽  
Phakopsora Pachyrhizi ◽  
Mato Grosso ◽  
Soybean Production ◽  
Soybean Plants ◽  
Production Areas

To study adhesion and viability of uredospores of the fungus Phakopsora pachyrhizi on soybean seeds during storage, suspension tests of those uredospores were carried out by washing seeds at each 30 days interval. Furthermore, germination and inoculation tests of uredospores on soybean plants were performed with uredospores collected from seeds of two soybean production areas, located in the municipalities "Chapada dos Guimarães" and "Tangará da Serra", State of Mato Grosso, Brazil. High levels of uredospores infestation were detected before storage [249.31 and 85.18 uredospores/100 seeds (U/100)] on seeds collected in both localities, respectively. After 30 days storage, these figures were 46.12 and 122.5 U/100; at 60 days were 14.62 and 26.62 U/100; and at 90 days were only 2.87 and 3,68 U/100, respectively; dropping to zero after 120 days storage. The percentage of germinated uredospores decreased with increasing storage periods and at 120 days germination percentage was nil. When uredospores were inoculated on soybean plants, rust symptoms were only observed for uredospores collected from freshly harvested seeds. Uredospores associated to soybean seed germinate until 90 days after storage, but are not viable after this time span. Infection of plants only occurs with inoculation of uredospores obtained from freshly harvested seeds.

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