Scientia Agropecuaria最新文献_第6页

Can fall armyworm damage decrease depending on the season, the maize hybrid, and the pesticide sprayed? 秋粘虫的危害会根据季节、玉米杂交种和喷洒的杀虫剂而减少吗？

IF 1.5

Scientia Agropecuaria Pub Date : 2023-08-11 DOI: 10.17268/sci.agropecu.2023.027

Mario Alberto Briones Ochoa, Fernando David Sánchez Mora, Dorys Terezinha Chirinos Torres

{"title":"Can fall armyworm damage decrease depending on the season, the maize hybrid, and the pesticide sprayed?","authors":"Mario Alberto Briones Ochoa, Fernando David Sánchez Mora, Dorys Terezinha Chirinos Torres","doi":"10.17268/sci.agropecu.2023.027","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.027","url":null,"abstract":"Maize is the third most important grass produced in the world after wheat and rice. Among the limitations of its production, fall armyworm, Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) is considered the most relevant pest in which corn is the main host plant. During the dry and rainy seasons of 2021-2022, lots of 1200 m2 were planted including three commercial hybrids, ADV-9139, Trueno NB-7443, and INIAP-551 in which the treatments were evaluated: T1: Sequence of insecticides (CLE) based on chlorantraniliprole, lufenuron, and emamectin benzoate. T2: Biological insecticide based on Bacillus thuringiensis (BT). T3: Methomyl-based treatment (MET). T4: Untreated plot (UP). Plant and cob damage, plant height and cob insertion, and grain yield were evaluated, and an economic analysis was performed. The least damage to plants and cobs was detected in the ADV-9139 hybrid. Regarding pesticides, CLE showed the best damage control in plants and the cobs were less damaged when CLE and BT were applied. Plant height and cob insertion height were lower in the ADV-9139 hybrid in which the highest grain yields were estimated. Plots treated with BT showed the highest increase in grain yield. The results show that the management of this voracious insect can be achieved combining the partial resistance of a maize genotype with pesticide applications with the lowest social, economic and ecological costs.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43424304","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

Effect of heat processing on bioactive compounds of dehydrated (lyophilized) purple mashua (Tropaeolum tuberosum) 热处理对脱水(冻干)紫麻花生物活性物质的影响

IF 1.5

Scientia Agropecuaria Pub Date : 2023-08-11 DOI: 10.17268/sci.agropecu.2023.028

Luis Alberto Medina Marroquin, Harry Ricardo Yucra-Condori, J. Gárate, Cecilia Mendoza, Enrique Deflorio

{"title":"Effect of heat processing on bioactive compounds of dehydrated (lyophilized) purple mashua (Tropaeolum tuberosum)","authors":"Luis Alberto Medina Marroquin, Harry Ricardo Yucra-Condori, J. Gárate, Cecilia Mendoza, Enrique Deflorio","doi":"10.17268/sci.agropecu.2023.028","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.028","url":null,"abstract":"Mashua (Tropaeolum tuberosum) is an Andean tuber rich in phenolic compounds and glucosinolates, known for its consumption that allows the prevention and/or reduction of getting diseases. The present research evaluated the effect of different types of post-harvest management (sunny, bleached, and freeze-dried) on glucosinolate content and its relationship with myrosinase activity. It is also important to note that when plant cells are damaged and glucosinolates meet the plant's myrosinase, which hydrolyzes them and degrades them to other compounds. In the present research, the types of glucosinolates, the content of glucosinolates and the activity of myrosinase of the purple variety of fresh raw mashua and in mashua treated by several types of processing were evaluated, including the previous treatment (sunny and unscrewed), the boiling treatment and the microwave treatment, with whitening times of 3, 4, 5 and 6 minutes, being the condition of the tuber at the time of bleaching in whole form and by cutting, to then be subsequently subjected to lyophilization treatments. Five glucosinolatos (GSL) were identified: 5-methylsulfinilpentile, 4-hydroxybenzyl, 4-hydroxy-3-indolylmethyl, benzyl and 4-methoxybenzyl, of which 4-methoxybenzyl glucosinolate is the most abundant, symbolizing 98% and 95% of the total GSL in the purple ecotype. According to the total concentration of glucosinolates found in the studied variety (purple), it must be 74.22 and 110.60 micromoles per gram of dry base (μmol/g dry weight), so mashua can be considered, the edible plant with the highest existing GSL content.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47106963","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

Assessing the risk of Fusarium oxysporum f. sp. cubense Tropical Race 4 outbreaks in Ecuadorian banana crops using spatial climatic data 利用空间气候数据评估厄瓜多尔香蕉作物中尖孢镰刀菌热带小种4爆发的风险

IF 1.5

Scientia Agropecuaria Pub Date : 2023-08-11 DOI: 10.17268/sci.agropecu.2023.026

Cindy M. Fernández-Ledesma, F. R. Garcés-Fiallos, Flavia Rosso, Nicolle Cordero, Simone Ferraz, Angelica Durigon, Diego Portalanza

{"title":"Assessing the risk of Fusarium oxysporum f. sp. cubense Tropical Race 4 outbreaks in Ecuadorian banana crops using spatial climatic data","authors":"Cindy M. Fernández-Ledesma, F. R. Garcés-Fiallos, Flavia Rosso, Nicolle Cordero, Simone Ferraz, Angelica Durigon, Diego Portalanza","doi":"10.17268/sci.agropecu.2023.026","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.026","url":null,"abstract":"The Musaceae family is susceptible to Fusarium wilt (Fw), which is considered the most important disease globally, caused by a group of Fusarium species that includes F. oxysporum f. sp. cubense tropical race 4 (FocTR4). Until recently, FocTR4 was not present in Latin America. However, wilting, chlorosis of leaves, and vascular discoloration (typical symptoms of Fw) were observed in at least a hundred Cavendish plants located in Colombia, Peru and Venezuela in 2019, 2021 and 2022, respectively. Normally, the disease is more severe throughout the warmer and rainy months of the year. Since Ecuador is the world's leading exporter of bananas, including plantains, this study aimed to identify agroclimatic favorability zones for FocTR4 potential incidence in the country, testing linear models to evaluate disease occurrence in relation to climatic conditions and map favorability zones. Most of the banana-producing provinces, including Guayas, Los Ríos, El Oro, Manabí, Santa Elena, and Esmeraldas, presented an estimate ranging from medium-low to very high. In Guayas and Los Rios, the agroclimatic favorability zones of the main Ecuadorian producer provinces for a very high-risk account for almost 50%. This information can help make preventive management decisions in zones with a greater risk of spreading FocTR4.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42146351","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: 1

Massive production of Hemileia vastatrix uredospores for infection of Coffea arabica seedlings 对阿拉比卡咖啡幼苗进行感染的半赤霞菌尿道孢子的大量生产

IF 1.5

Scientia Agropecuaria Pub Date : 2023-07-10 DOI: 10.17268/sci.agropecu.2023.023

Ángel David Hernández-Amasifuen, Lenin Rivadeneyra-Chisquipama, Amner Padilla-Dominguez, Richard Paredes‐Espinosa, J. C. Guerrero-Abad, E. Torres-Flores, Jorge Luis Peláez-Rivera, F. Carvajal-Vallejos, D. L. Gutiérrez-Reynoso, M. Corazon-Guivin

{"title":"Massive production of Hemileia vastatrix uredospores for infection of Coffea arabica seedlings","authors":"Ángel David Hernández-Amasifuen, Lenin Rivadeneyra-Chisquipama, Amner Padilla-Dominguez, Richard Paredes‐Espinosa, J. C. Guerrero-Abad, E. Torres-Flores, Jorge Luis Peláez-Rivera, F. Carvajal-Vallejos, D. L. Gutiérrez-Reynoso, M. Corazon-Guivin","doi":"10.17268/sci.agropecu.2023.023","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.023","url":null,"abstract":"Coffee leaf rust (Hemileia vastatrix) is the most important disease in coffee crops around the world. Currently, there is limited knowledge about mass production methodologies and ex-situ infection of H. vastatrix that lead to the development of different health characterization studies of Coffea or disease phenotyping. In this context, the aim of this research was to develop a simple protocol for the mass production of coffee rust uredospores under controlled conditions and to determine their infection in coffee seedlings. Uredospores of H. vastatrix were collected from infected plants in the “Chontal” coffee-growing area in San Martín, Peru. The viability of uredospore germination was evaluated, and a uredospores suspension (2 x 105 uredospores/mL) was prepared to inoculate coffee seedlings. Incidence and sporulation rates were evaluated after 43 days of inoculation. During the multiplication process of H. vastatrix uredospores, using controlled conditions (23±1 °C, ≈ 80% relative humidity and photoperiod of 16 hours of light) under an innovative system, the first symptoms of chlorosis were observed on coffee leaves 20 days after inoculation. Our findings show a 100% incidence of inoculated coffee plants with an average of 54 mg of H. vastatrix uredospores per plant and a 1.38 x 10-1 mg/cm2 sporulation rate. Finally, here we report a protocol that allows mass multiplication of H. vastatrix uredospores under controlled conditions, that would be useful in any time for coffee leaf rust bioassays.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48839743","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

Geolashon (Teloschistes flavicans), a natural yellow dye from the Peruvian Andes: traditional uses, bioactive extraction, and potential applications 来自秘鲁安第斯山脉的天然黄色染料Geolashon：传统用途、生物活性提取和潜在应用

IF 1.5

Scientia Agropecuaria Pub Date : 2023-07-10 DOI: 10.17268/sci.agropecu.2023.024

German Padilla Pacahuala, Erick Abel Barzola Ollero, José Isrhael Quincho Estares, Julio Cesar Maceda Santivañez, G. Q. Quispe Santivañez, Perfecto Chagua Rodríguez, Rebeca Salvador-Reyes, Larry O Chañi-Paucar

{"title":"Geolashon (Teloschistes flavicans), a natural yellow dye from the Peruvian Andes: traditional uses, bioactive extraction, and potential applications","authors":"German Padilla Pacahuala, Erick Abel Barzola Ollero, José Isrhael Quincho Estares, Julio Cesar Maceda Santivañez, G. Q. Quispe Santivañez, Perfecto Chagua Rodríguez, Rebeca Salvador-Reyes, Larry O Chañi-Paucar","doi":"10.17268/sci.agropecu.2023.024","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.024","url":null,"abstract":"Recently, interest in studying pigments from lichens has been aroused due to their bioactive properties and health benefits. The Geolashon (Teloschistes flavicans) is a thousand-year-old lichen from the Peruvian Andes characterized by its yellow filaments, traditionally used by the Peruvian inhabitants as a natural pigment for making handicrafts and medicinal purposes. In this sense, this article aims to compile all the studies on Geolashon as a source of natural yellow pigments, starting from its importance and applications by the Andean population to research on obtaining, characterizing, and properties of its extracts. Although studies on this lichen are limited, it was observed that the obtained from lichen are rich in 3-[1’-(2”,3”-dihydroxy-phenyl)-propyl]-7-hydroxy- chroman-4-one, vicanicin, parietin, other compounds and has antidiabetic, antibacterial, antileukemic, antimicrobial, anticancer and termiticide activity that would be interesting for use in the pharmaceutical, cosmetic, food and agricultural industries, generating added value in the final product. Aspects such as processing, functional properties, and toxicology of the bioactive components of Geolashon must be studied for its correct use.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45884204","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

Effect of five cooking methods on the physicochemical, nutritional and sensory characteristics of rainbow trout (Oncorhynchus mykiss) 五种烹饪方法对虹鳟理化、营养和感官特性的影响

IF 1.5

Scientia Agropecuaria Pub Date : 2023-07-10 DOI: 10.17268/sci.agropecu.2023.022

M. Ramos, Rolys Bustillos, Salomón Ruíz, Tarsila Tuesta, Reynaldo J. Silva-Paz, Oscar Jordán-Suárez

{"title":"Effect of five cooking methods on the physicochemical, nutritional and sensory characteristics of rainbow trout (Oncorhynchus mykiss)","authors":"M. Ramos, Rolys Bustillos, Salomón Ruíz, Tarsila Tuesta, Reynaldo J. Silva-Paz, Oscar Jordán-Suárez","doi":"10.17268/sci.agropecu.2023.022","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.022","url":null,"abstract":"This study aimed to evaluate the effect of five cooking methods (steam, grill, oven, frying and microwave) on farm-raised rainbow trout's sensory acceptability, physicochemical characteristics, and nutritional value. A survey was conducted with 307 consumers to create a marinade made with salt, garlic, cumin and pepper. The fillets marinated in this mixture were cooked, and photographs were taken to determine their sensory profile using the Check All That Apply (CATA) method, as well as their appearance through both visual (n = 289) and virtual (n = 100) surveys. Similarity was found between the sensory attribute maps for frying, oven and grilling in both evaluation methods. Significant differences (p < 0.05) in proximal composition were observed between the cooking techniques studied because of their technological parameters. The methods with the best visual acceptability were frying and microwave, and they caused an increase in the peroxide index. The n-6/n-3 ratio for both techniques (3.62 and 2.05) was within the requirement, being higher in frying due to the predominance of Omega 6 fatty acids incorporated by the oil used. This study demonstrated that the Peruvian consumer prefers cooking techniques characterized by ease of preparation and marked the development of color and texture attributes.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45351761","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

Emotions and visual preferences of consumers towards native and classic potato (Solanum tuberosum) chips: Comparative study using neurogastronomy and neuromarketing 消费者对本地和经典土豆片的情绪和视觉偏好：使用神经美食学和神经营销的比较研究

IF 1.5

Scientia Agropecuaria Pub Date : 2023-06-05 DOI: 10.17268/sci.agropecu.2023.021

Samuel Julca-Infantes, J. P. Cruz‐Tirado, Delia Izaguirre-Torres

{"title":"Emotions and visual preferences of consumers towards native and classic potato (Solanum tuberosum) chips: Comparative study using neurogastronomy and neuromarketing","authors":"Samuel Julca-Infantes, J. P. Cruz‐Tirado, Delia Izaguirre-Torres","doi":"10.17268/sci.agropecu.2023.021","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.021","url":null,"abstract":"El uso de herramientas tecnológicas, en adición a las técnicas tradicionales, para conocer las emociones y preferencia de los consumidores a productos alimenticios es muy importante para que los desarrolladores de productos tengan mejor información para la toma de decisiones. El objetivo del presente estudio fue utilizar herramientas de la neurogastronomía y neuromarketing para estudiar las emociones y preferencias visuales de los consumidores hacia hojuelas de papas (Solanum tuberosum) nativas y clásicas. Se utilizaron dos tipos de hojuelas frita, papa clásica y papa nativa, con un costo de S/ 6,60 (1.79 USD) y S/ 7,00 (1.90 USD), respectivamente. En una primera etapa se utilizó la tecnología de Seguimiento Ocular y el Análisis de Emoción utilizando una aplicación para teléfono móvil. En una segunda etapa, cada participante respondió una encuesta cognitiva, mediante el uso de formulario Google. Se utilizaron 100 consumidores con edades entre 14 y 63 años. La encuesta mostró que un 45% de los consumidores mostraron su intención de comprar el producto nativo más que el producto clásico. Los resultados de neuromarketing mostraron principalmente una mayor proporción de neutralidad, y un poco menor, en emociones negativas de “escepticismo”, “tristeza” y “disgusto”, especialmente sobre el factor nutricional y el precio. Estos resultados, más que contradictorios son complementarios, ya que las herramientas tecnológicas nos permiten conocer más detalles de las preferencias y elecciones. Los consumidores pretenden consumir más productos nativos, siempre que sean más nutritivos, más sustentables, más baratos y beneficien al productor local.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42957252","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

Botanical diversity, structure and composition in cocoa agroforest systems in Alta Verapaz, Guatemala 危地马拉上维拉帕斯可可农林系统的植物多样性、结构和组成

IF 1.5

Scientia Agropecuaria Pub Date : 2023-06-05 DOI: 10.17268/sci.agropecu.2023.020

Carlos Enrique Villanueva-González, M. Kalousová, J. Ruiz-Chután, Roberto Waldemar Moya Fernandez, C. Villanueva, B. Lojka

{"title":"Botanical diversity, structure and composition in cocoa agroforest systems in Alta Verapaz, Guatemala","authors":"Carlos Enrique Villanueva-González, M. Kalousová, J. Ruiz-Chután, Roberto Waldemar Moya Fernandez, C. Villanueva, B. Lojka","doi":"10.17268/sci.agropecu.2023.020","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.020","url":null,"abstract":"The tree composition in cocoa agroforestry systems (CAFS) in Guatemala is valued for providing a number of ecosystem services. Despite the importance of the trees in these systems, little is known about the tree species richness and its contribution to the conservation of diversity. We studied the botanical composition of CAFS of different ages in the Alta Verapaz department of Guatemala. In total, 70 survey plots with a size of 2500 m2 were established. An inventory was carried out in each sampling unit, recording the tree species present and measuring the diameter at breast height (DBH 1.30 m) and the height of each tree. The Importance Value Index (IVI) was calculated and species richness and the similarity between sites were evaluated. A total of 2519 trees, belonging to 59 species and 34 families were identified. The species with the highest IVI was Gliricidia sepium (Jacq.) Kunth. The CAFSs with the highest and lowest species richness were those of 9-12 and 27 years old, respectively (H´=1.99, H´=0.34). This behavior can be explained by the fact that growers work to enrich the agroforestry systems with a broad diversity of species in the first years which they then begin to harvest at around 16 years of age. A discriminant analysis of principal components (DAPC) and the Jaccard Similarity Index were used to show that several AFS were similar in terms of composition and botanical diversity. Given the tree diversity within the CAFS, these can be acknowledged as areas with good potential for the conservation of overall biodiversity. We recommend education programs for local growers about the benefits of shade management during the production cycle of cocoa to preserve the botanical composition and structural complexity of the AFS.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48016843","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

Cassava torrado-like virus encodes a gene that facilitates the mechanical transmission to Nicotiana benthamiana of Cassava virus X 木薯torrado样病毒编码一个基因，该基因促进木薯病毒X向本氏烟草的机械传播

IF 1.5

Scientia Agropecuaria Pub Date : 2023-06-05 DOI: 10.17268/sci.agropecu.2023.019

J. Jimenez, A. Leiva, W. Cuellar

{"title":"Cassava torrado-like virus encodes a gene that facilitates the mechanical transmission to Nicotiana benthamiana of Cassava virus X","authors":"J. Jimenez, A. Leiva, W. Cuellar","doi":"10.17268/sci.agropecu.2023.019","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.019","url":null,"abstract":"Cassava-torrado-like virus (CsTLV) is a bipartite single-stranded RNA virus belonging to the family Secoviridae. The virus has been reported in Brazil and Colombia, and is usually found in mixed infections, and in plants affected by Cassava Frogskin Disease (CFSD), an endemic cassava disease in the Americas. Genome analysis of CsTLV identifies a gene in RNA2 implicated in pathogen movement in other torradoviruses. This gene (RNA2-ORF1) and another one no related to virus movement (Maf/Ham1) were amplified by PCR and cloned into constructs under the 35S promoter of cauliflower mosaic virus (CaMV), which then were transfered to agrobacterium binary vectors. When agro-infiltrated in Nicotiana benthamiana plants, only RNA2-ORF1 had a positive effect on the mechanical inoculation of cassava virus X (CsVX), a potexvirus that has a low rate of mechanical infection in N. benthamiana. Efficiency of CsVX mechanical transmission was measured by the number of infected plants, presence of symptoms, and titers of CsVX as measured by ELISA, two weeks after infection. On average, CsVX could infect 2.3 times more plants when these were previously agro-infiltrated with A. tumefaciens binary vector encoding CsTLV RNA2-ORF1. We conclude that the novel secovirid CsTLV associated with leaf spot symptoms in cassava, encodes a gene that could enhance other viral infections in N. benthamiana. Further studies are required to elucidate this effect and its role in mixed infections, often observed in cassava plants affected by CFSD.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45337955","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

Forecasting occurrence of palm weevil Rhynchophorus palmarum L. (Coleoptera, Curculionidae) using Autoregressive Integrated Moving Average modeling 应用自回归综合移动平均模型预测棕榈象(鞘翅目，棕象科)的发生

IF 1.5

Scientia Agropecuaria Pub Date : 2023-05-08 DOI: 10.17268/sci.agropecu.2023.015

Eduardo L. Pacheco-Sánchez, Lenin A. Guamani-Quimis, Cinara Ewerling da Rosa, Diego Portalanza, Alejandro E. Mieles, F. R. Garcés-Fiallos

{"title":"Forecasting occurrence of palm weevil Rhynchophorus palmarum L. (Coleoptera, Curculionidae) using Autoregressive Integrated Moving Average modeling","authors":"Eduardo L. Pacheco-Sánchez, Lenin A. Guamani-Quimis, Cinara Ewerling da Rosa, Diego Portalanza, Alejandro E. Mieles, F. R. Garcés-Fiallos","doi":"10.17268/sci.agropecu.2023.015","DOIUrl":"https://doi.org/10.17268/sci.agropecu.2023.015","url":null,"abstract":"Oil palm (Elaeis guineensis L.) is a crucial crop in Ecuador, considerably affected by black palm weevil Rhynchophorus palmarum L. (Coleoptera: Curculionidae) for several years. Despite its importance, the behavior of the black weevil in Ecuador is not well comprehended presently. Therefore, this study aimed to predict infestation patterns of the black palm weevil in Ecuador using a mathematical model based on monitoring data. Data on the number of insects per trap from a commercial oil palm farm in Quinindé, Ecuador, was collected every two weeks for five years (2016-2020) and analyzed using the Classical Fourier (CF) spectrum and the Dickey-Fuller test to determine seasonality. The trend component of the data dropped from 16.33 in January 2017 to 11.96 in January 2019, with a fluctuation ranging from -0.11 to 2.50 observed for the entire data set. The results obtained after fitting the model ranged from -0.11 to 3.19, with a maximum of 5.30. The augmented Dickey-Fuller (ADF) test for the black weevil time series yielded a result of -5.60 (P<0.01). The partial autocorrelation ranged from -0.35 to 0.1. Based on our model, we projected the occurrence of black palm weevil from 2021 to 2024, with a fluctuation in the number of insects per trap ranging from 12.68 in January 2021 to 13.023 in November 2023. This model can be used to predict future insect occurrences in Ecuador, providing valuable insights into the behavior of the black weevil and using it for effective development control measures for this pest.","PeriodicalId":21642,"journal":{"name":"Scientia Agropecuaria","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47448908","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}

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