Scientia Agropecuaria最新文献

Commercial Tara Protein: Functional properties and use to stabilize sacha inchi oil emulsions obtained by ultrasound 商用塔拉蛋白：功能特性及用于稳定超声波获得的沙棘油乳剂

IF 1

Scientia Agropecuaria Pub Date : 2024-07-16 DOI: 10.17268/sci.agropecu.2024.031

Jhajaira Angelitha Sulca-Vásquez, Eliana Marcela Vélez-Erazo, José Luis Pasquel‐Reátegui, O. W. Mendieta-Taboada

{"title":"Commercial Tara Protein: Functional properties and use to stabilize sacha inchi oil emulsions obtained by ultrasound","authors":"Jhajaira Angelitha Sulca-Vásquez, Eliana Marcela Vélez-Erazo, José Luis Pasquel‐Reátegui, O. W. Mendieta-Taboada","doi":"10.17268/sci.agropecu.2024.031","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.031","url":null,"abstract":"Commercial tara protein (CTP) and sacha inchi oil are promising Peruvian products for forming food emulsions. The present work aimed (1) to characterize the functional properties of CTP as a new protein source (water and oil absorption, foam, and gelling capacity) and (2) to deepen the CTP to form sacha inchi oil emulsions. The CTP (2%, 4%, 6%) and oil concentration (15%, 20% and 25%) were evaluated for rotor-stator (RS) emulsion production. Final emulsions (RS-US) were produced with RS emulsions added with 2% tara gum and ultrasound homogenization at 75% power amplitude for 3 min. Emulsions were analyzed according to gravitational stability, droplet size, and optical microscopy. The results showed that the CTP presented a centesimal composition of 6.03% moisture, 45.16% proteins, 12.32% lipids, 2.49% fiber, 6.04% ashes, and 27.96% carbohydrates. CTP had a greater oil absorption (2.1442 ±0.26 g/g solids) than water absorption (1.8201 ±0.02 g/g solids), did not present foam formation, and the least gelation concentration was 18%. RS-US emulsions prepared with 25% oil and 2% or 4% protein had greater stability against the creaming index and phase separation during 4h, despite emulsion prepared with 15% oil presenting the lowest mean droplet size. In conclusion, the results show that commercial tara protein effectively prepared emulsions with a combined method (rotor-stator, ultrasound, and tara gum).","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141643895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlations, genetic and phenotypic parameters in quantitative and qualitative traits of Swietenia macrophylla in Ucayali, Peru 秘鲁乌卡亚利大叶女贞数量和质量性状的相关性、遗传和表型参数

IF 1

Scientia Agropecuaria Pub Date : 2024-07-16 DOI: 10.17268/sci.agropecu.2024.030

Jorge Manuel Revilla Chávez, Marcela Aparecida de Moraes, Jorge Javier Revilla Macedo, Willian Felipe Vergaray Rengifo, Jesús Antonio Mego Pérez, Henry Silvio Saldaña Dominguez, Emily Stefania Vigo Ampuero, Antony Cristhian Gonzales Alvarado, Rubén Dario Manturano Pérez, Rubén Casas Reátegui, Jorge Arturo Mori Vasquez, Alexandre Magno Sebbenn

{"title":"Correlations, genetic and phenotypic parameters in quantitative and qualitative traits of Swietenia macrophylla in Ucayali, Peru","authors":"Jorge Manuel Revilla Chávez, Marcela Aparecida de Moraes, Jorge Javier Revilla Macedo, Willian Felipe Vergaray Rengifo, Jesús Antonio Mego Pérez, Henry Silvio Saldaña Dominguez, Emily Stefania Vigo Ampuero, Antony Cristhian Gonzales Alvarado, Rubén Dario Manturano Pérez, Rubén Casas Reátegui, Jorge Arturo Mori Vasquez, Alexandre Magno Sebbenn","doi":"10.17268/sci.agropecu.2024.030","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.030","url":null,"abstract":"The speed of growth in height of Swietenia macrophylla stands out in terms of resistance to attack by the Hypsipyla grandella borer and the selection of fast-growing families can make commercial plantings viable. The characters height, diameter, number of leaves and stem form of trees from 4 families of S. macrophylla, aged 47.5 months, planted in Ucayali, Peru, were used to investigate the possibility of selecting fast-growing genotypes. The average heritability (h2m) and selective accuracy (Acprog) between families were moderate for total height (Ht: h2m: 0.407; Acprog: 0.638) and commercial height (Hc: h2m: 0.472; Acprog: 0.687), in addition to Hc positively correlating with susceptibility to the drill attack. The stem form showed statistical differences between families and great h2m (0.984) and Acprog (0.921). The genetic (rg) and phenotypic (rf) correlations between traits showed that a selection of individuals with greater heights will generally result in greater growth in diameter, number of leaves and better stem form. The study highlights the importance of selecting families with fast growth in height and straight stems to enable, improve the quality and increase the productivity of commercial plantations with the species.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141642610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Un Indicator values for food shelf life prediction: A review 食品保质期预测指标值：综述

IF 1

Scientia Agropecuaria Pub Date : 2024-07-16 DOI: 10.17268/sci.agropecu.2024.032

Teofilo Espinoza Tellez, Roberto Quevedo-León, Oscar Díaz-Carrasco

{"title":"Un Indicator values for food shelf life prediction: A review","authors":"Teofilo Espinoza Tellez, Roberto Quevedo-León, Oscar Díaz-Carrasco","doi":"10.17268/sci.agropecu.2024.032","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.032","url":null,"abstract":"The short time that people have to cook their own food has led industries to satisfy the need for ready-to-eat products. This has motivated a progressive increase in studies that can determine the time at which the product can be safely consumed (shelf life). There are several methods for determining the shelf life of products; but regardless of the method used, the key is to know the minimum and/or maximum values of the indicators that define their deterioration. These values of spoilage indicators can change according to the compositional conditions of the food or the conditions under which it is stored during its shelf life. This review provides values for indicators used in tests for the determination of food shelf life, according to their nature, and environmental conditions, as way to be used by researchers as a reference in their predictions. The results of this research show scientific evidence through published articles about indicator values, their changes, referring to food shelf life kinetics. These values can be used for the prediction of food shelf life, for comparison purposes with their respective studies. It will be of importance for consumers, who will be able to use these values as a reference in the storage of these products. Shelf life indicator values for foods not considered in this work should be evaluated or experimented with in future work.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141643622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of high Andean grasslands on landslide reduction in Peru 安第斯高原草地对减少秘鲁山体滑坡的影响

IF 1.5

Scientia Agropecuaria Pub Date : 2024-06-07 DOI: 10.17268/sci.agropecu.2024.025

Franco Cerna Cueva, Katherin Lourdes Uriarte-Barraza, Grecia Isabel Lobaton-Tarazona, Wensty Saenz-Corrales, Casiano Aguirre-Escalante, Abby Solange Da Cruz-Rodriguez, Sandra Lorena Zavala-Guerrero

{"title":"Influence of high Andean grasslands on landslide reduction in Peru","authors":"Franco Cerna Cueva, Katherin Lourdes Uriarte-Barraza, Grecia Isabel Lobaton-Tarazona, Wensty Saenz-Corrales, Casiano Aguirre-Escalante, Abby Solange Da Cruz-Rodriguez, Sandra Lorena Zavala-Guerrero","doi":"10.17268/sci.agropecu.2024.025","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.025","url":null,"abstract":"Agricultural and urban expansion has caused considerable degradation of ecosystems. In the case of Peruvian high Andean grasslands, it was reported that between 2000 and 2009, this ecosystem was reduced by 7%. The limited or no protection they receive is partly due to the fact that the benefits of ecosystem services are not widely known. This research aims to establish and predict the influence of high Andean grasslands on the annual occurrence of landslides. To do so, we identified occurrences of landslides, falls, huaycos, avalanches, and alluviums in high Andean grasslands. We also examined urban areas and agricultural zones of Peru for the period from 2003 to 2016. Subsequently, we extracted data on precipitation, temperature, slopes, soil types, and geographical variables. This data was used to train a machine learning model. The results show that 96% of landslides occurred in human-intervened areas, and only 4% in high Andean grasslands. Precipitation and slope thresholds for landslide occurrence are higher in high Andean grasslands compared to agricultural and urban areas. The best-performing machine learning models were linear regression, Gaussian processes, random forest, and support vector machine. They had coefficients of determination of R² = 0.80, 0.80, 0.66, and 0.64, respectively. Predictions show that if agricultural or urban areas are established in wet or dry puna grasslands, the average number of occurrences multiplies. The multiplier factors are 2.1 and 7.08, the number of deaths by 2.8 and 10.49, the number of houses destroyed by 2.4 and 7.51, and the number of roads destroyed by 2.2 and 7.37, respectively. The study demonstrates that conserving high Andean grasslands significantly reduces landslides compared to urban or agricultural areas.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141370947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave assisted popping of five Andean cultivars of ñuña beans: Process optimization and effect of grain’s moisture content 五种安第斯栽培品种ñña 豆的微波辅助爆炒：工艺优化和谷物水分含量的影响

IF 1.5

Scientia Agropecuaria Pub Date : 2024-06-07 DOI: 10.17268/sci.agropecu.2024.027

Juan Saavedra, Alberto Claudio Miano

{"title":"Microwave assisted popping of five Andean cultivars of ñuña beans: Process optimization and effect of grain’s moisture content","authors":"Juan Saavedra, Alberto Claudio Miano","doi":"10.17268/sci.agropecu.2024.027","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.027","url":null,"abstract":"This research aimed to optimize the microwave popping process of 5 cultivars of ñuña beans under different moisture content. This work was divided into two stages: determining the optimal time and microwave power for maximum popping and studying the effect of initial grain moisture content on popping percentage. For this, grains were conditioned to 9%, 11%, 13% and 15% of moisture content. The results suggested that only the cultivars “Vaquita poroto”, “Negra” and “Jabona” cultivars reach the highest popping percentages selecting optimum microwave power and process time. In addition, this work found that for every studied cultivar, moisture content between 9 to 11% w.b (wet basis). is suitable to maximize popping percentage. Moisture contents greater than 13% w.b. drastically reduced the popping percentage but increased expansion percentage. In conclusion, this work recommended “Vaquita poroto” cultivar since it presented the maximum popping percentage even at moisture content up to 13% w.b. As practical applications, popping process using microwave has not been widely study, especially for non-conventional popping beans. These beans are consumed in South America; however, they can be exported as a healthy snack. In addition, this work optimized the process and selected the best cultivar of this bean to be industrialized. In addition, the present work demonstrated the importance of the initial moisture content of the beans to improve quality and yield of burst grains.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141373695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A strategy to optimize soil phosphorus reserve: A study based on native maize of Mexico and genotype selection 优化土壤磷储备的策略：基于墨西哥本地玉米和基因型选择的研究

IF 1.5

Scientia Agropecuaria Pub Date : 2024-06-07 DOI: 10.17268/sci.agropecu.2024.026

Selene Guadalupe Salazar Mejía, Jeannette S. Bayuelo Jiménez

{"title":"A strategy to optimize soil phosphorus reserve: A study based on native maize of Mexico and genotype selection","authors":"Selene Guadalupe Salazar Mejía, Jeannette S. Bayuelo Jiménez","doi":"10.17268/sci.agropecu.2024.026","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.026","url":null,"abstract":"Continual removal of phosphorus (P) by the crop gradually decreases soil fertility and drives the need for fertilizer inputs for agricultural production. Phytate is considered as the major storage pool for P in the seeds, but its contribution to human nutrition is low. The objective of this study was to characterize quantitative P concentrations (phytate, inorganic P and total P) of 50 native maize genotypes of Zea mays L. of the Patzcuaro lake, Michoacan, Mexico. The average total P and phytate concentration observed across all the genotypes was 3,1, 2,64, and 0,43 mg g-1, respectively. The relationship between phytate and total P was strong (r= 0,98**). This clearly suggests that with an increase in total P there is a corresponding increase in phytate concentration. Cluster analysis of data indicated five distinct groups with 1, 14, 11, 15 and 9 genotypes, respectively. Clusters I and II contained low phytate genotypes (1,74 mg g-1) while cluster V grouped most of the high phytate (4,9 mg g-1) contenting genotypes. Principal component analysis and F test showed the attributes more influencing group separation. Those attributes were total P and phytate. The first two components explained the 95% of the accumulation variation among groups. The race of the genotypes, however, was no clearly related to the group differentiation. These observations provide the first study on the genetic variety for breeding maize with lower P concentration to reduce P extraction from maize field at harvest.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of leachate on soil microbial diversity and its treatment 沥滤液对土壤微生物多样性的影响及其处理方法

IF 1.5

Scientia Agropecuaria Pub Date : 2024-05-13 DOI: 10.17268/sci.agropecu.2024.023

Ronald Hugo Puerta-Tuesta, Casiano Aguirre, José Kalion Guerra Lu, A. Cerna-Cueva, Warren Rios-Garcia, Marco Dueñas-Tuesta, Christian Paredes

{"title":"Impact of leachate on soil microbial diversity and its treatment","authors":"Ronald Hugo Puerta-Tuesta, Casiano Aguirre, José Kalion Guerra Lu, A. Cerna-Cueva, Warren Rios-Garcia, Marco Dueñas-Tuesta, Christian Paredes","doi":"10.17268/sci.agropecu.2024.023","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.023","url":null,"abstract":"This study analyzed the impact of leachate from a temporary landfill on soil microbial diversity in Tingo María, Huánuco region, Peru. Three treatments were used: untreated soil (S), addition of stream water (T0), leachate (T1), and leachate treated by coagulation and flocculation (T2), with 828.5 ml/week added in three weekly doses. Soil samples were collected from the Reserved Forest of the Universidad Nacional Agraria de la Selva. Twenty-one randomly distributed soil samples were taken and homogenized for analysis. Soil quality parameters measured included sand, clay, silt, texture, pH, organic matter, nitrogen, phosphorus and potassium. As for microorganisms, viable aerobes, lactobacilli, actinomycetes, fungi, nitrogen-fixing bacteria, and Escherichia coli were quantified using specific culture and counting methods for each of them. To evaluate the impact of the leachate on microbial diversity, equity indices (Shannon and inverse Simpson), dominance indices (complementary Simpson and Berger Parker) and the percentage composition of each microorganism per treatment were used. An ANOVA was performed to estimate differences in microbial diversity, with a Tukey test at a significance level of α = 0.05. The study showed that leachates affect soil microbial diversity, reducing equity and increasing the dominance of certain species such as E. coli. They also alter physicochemical parameters, decreasing organic matter and nitrogen but increasing other elements such as phosphorus and potassium. This could have implications for soil health and functionality.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140983222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compensación cinética y termodinámica del pardeamiento no enzimático de zumos clarificados de limón 澄清柠檬汁非酶促褐变的动力学和热力学补偿

IF 1.5

Scientia Agropecuaria Pub Date : 2024-05-13 DOI: 10.17268/sci.agropecu.2024.020

R. Ibarz, A. Garvín, Oriol Tomasa, Albert Ibarz

{"title":"Compensación cinética y termodinámica del pardeamiento no enzimático de zumos clarificados de limón","authors":"R. Ibarz, A. Garvín, Oriol Tomasa, Albert Ibarz","doi":"10.17268/sci.agropecu.2024.020","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.020","url":null,"abstract":"This paper presents a study on kinetic and thermodynamic compensation to evaluate the kinetics of non-enzymatic browning of clarified lemon juices. In a previous work, the kinetic constants of browning were presented using the evolution of the absorbance at 420 nm (A420) and luminosity (L*) for different soluble solids contents (64.6; 50; 35; 20 and 10 ºBrix) and different working temperatures (70, 80, 90 and 95 ºC). The parameters of the Arrhenius equation were obtained by fitting the kinetic constants and temperatures. The variation of lnK0 with Ea follows a linear trend, so there is kinetic compensation, with isokinetic temperature values being 126.6 ºC and 149.7 ºC for A420 and L*, respectively. The transition state equilibrium constants were determined using the Eyring equation for each soluble solids content and each temperature. The equilibrium constants were adjusted to the Van't Hoff equation and the set of pairs of estimated values for the activation enthalpy and the activation entropy also followed a straight line, which causes thermodynamic compensation, with isoequilibrium temperatures of 112.8 ºC and 136.3 ºC for A420 and L*, respectively. It was concluded that the browning mechanism is the same for the ranges of soluble solids content and temperature studied. Since all isokinetic and isoequilibrium temperatures were higher than the working temperature values, it was also concluded that the control was enthalpic for all cases. To avoid the deterioration of these juices, it is advisable to intervene in the working temperature, trying to ensure that the heat treatment is carried out at the lowest possible temperature.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Meloidogyne spp. and population density of phytoparasitic nematodes associated with alliaceae crops in the Arequipa region, Peru 秘鲁阿雷基帕地区与全缘木科作物相关的 Meloidogyne spp.的特征和植物寄生线虫的种群密度

IF 1.5

Scientia Agropecuaria Pub Date : 2024-05-13 DOI: 10.17268/sci.agropecu.2024.022

Victor Alexi Peralta Ccayahuallpa, Victor Hugo Casa Coila, Israel Lima Medina, Luis Alberto Cuadros Fernández, Dennis Geoffrey Macedo Valdivia

{"title":"Characterization of Meloidogyne spp. and population density of phytoparasitic nematodes associated with alliaceae crops in the Arequipa region, Peru","authors":"Victor Alexi Peralta Ccayahuallpa, Victor Hugo Casa Coila, Israel Lima Medina, Luis Alberto Cuadros Fernández, Dennis Geoffrey Macedo Valdivia","doi":"10.17268/sci.agropecu.2024.022","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.022","url":null,"abstract":"Alliaceae crops includes several species of agricultural importance for the Arequipa region, among them the onion is the most produced in the country, however, these crops are affected by phytoparasitic nematodes, including Meloidogyne spp. which causes significant losses in the yield. The aim of the present study was to characterise the root-knot nematode (Meloidogyne spp) and determine the population density of phytoparasitic nematodes in alliaceae crops in the main producing localities of the Arequipa region. Samples of roots and soil were collected in onion, chinese onion, leek and chives crops in the provinces of Arequipa, Castilla, Caylloma and Islay. The identification of nematode genus was found by morphological characteristics and the characterization of Meloidogyne were performed by perineal patterns and electrophoretic pattern of esterase (Est). In the 38 soil samples, different genus of plant-parasitic nematodes was found: Aphelenchus, Dorylaimus, Helicotylenchus, Hemicycliophora, Meloidogyne, Mesocriconema, Mononchus, OGMA, Pratylenchus, Rotylenchus, Tylenchus, Xiphinema and free-living nematodes, in root samples, eight populations of Meloidogyne spp. were found. distributed among three species: (1) M. incognita phenotype Est I1, Rm: 1.0 with 33.33% of frequency and Est I2, Rm: 1.03, 1.07 (50%); (2) M. javanica Est J3, Rm: 1.03, 1.24, 1.37 (16.67%) and an atypical species named Meloidogyne sp. Rm: 0.85 (33.33%). The identification of genus and species phytoparasitic nematodes in alliaceae will allow the adoption of more efficient integrated management measures, because have a distinct parasitism behavior.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140984782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies 用氮肥治理棉花上的 Cercospora 叶斑病取决于植株树冠上的病害量

IF 1.5

Scientia Agropecuaria Pub Date : 2024-05-13 DOI: 10.17268/sci.agropecu.2024.021

Víctor F. Parrales-Rodríguez, F. Zambrano-Gavilanes, Diego Portalanza, F. R. Garcés-Fiallos

{"title":"Cercospora leaf spot management with nitrogenous fertilizers in cotton is dependent on the disease amount in the plant canopies","authors":"Víctor F. Parrales-Rodríguez, F. Zambrano-Gavilanes, Diego Portalanza, F. R. Garcés-Fiallos","doi":"10.17268/sci.agropecu.2024.021","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2024.021","url":null,"abstract":"The aim of this study was to examine the impact of both organic and inorganic nitrogen fertilizers on the intensity and epidemiological components of Cercospora leaf spot across three different canopies of cotton plants, specifically the variety DP ACALA 90, under field conditions. Fertilizers used in the study included bovine manure, Jatropha curcas seedcake, poultry manure, and urea (the latter serving as a control). These were applied at 20 days after plant emergence and then during the flowering stage until the total nitrogen (N) dose reached 50, 100, 150, or 200 kg N per hectare. The incidence and severity of the disease were assessed starting at the reproductive stage B1 (the first visible flower bud) across the lower, middle, and upper canopies of four cotton plants, with six evaluations conducted over time. To calculate the initial inoculum (Y0) and the disease progress rate (r), the Exponential, Gompertz, and Logistic models were employed based on temporal data. The study was designed as a randomized complete block with a 4x4 factorial arrangement (fertilizer type x dose), and mean comparisons were made using Tukey's test (p ≤ 0.05). It was found that disease intensity within each canopy level varied in response to the type of nitrogen source and the applied dose, with the severity of the disease (including the area under the disease progress curve) being particularly influenced. A significant interaction between the type of fertilizer and the dose regarding the intensity of Cercospora leaf spot was observed. The Exponential model most accurately depicted the disease's temporal progression. Notably, poultry manure and urea were the fertilizers that most adversely influenced the intensity and initial inoculum (Y0) of Cercospora leaf spot across the various canopies of the cotton plants. The findings suggest that the use of organic fertilizers in cotton cultivation could represent a viable sustainable management strategy.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0