Pub Date : 2018-12-30DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109
H. A. G. Villalba, D. R. Diaz, E. L. Schoninger, Carlos Andrés Leguizamón Rojas
Cover crops (CC) and crop rotation are key components of a sustainable crop production system. The objectives of this study were to (i) evaluate the effect of winter CC on nitrogen (N) supply to the subsequent maize crop, and to (ii) evaluate the effect of CC on soil cover and weed population. Three winter CC were evaluated: black oat (BO) (Avena strigosa Schieb), white lupin (WL) (Lupinus albus), and oilseed radish (OR) (Raphanus sativus L.), as single species and in a mix. The three CC mixes included: BO+WL; BO+OR; and OR+WL. In addition to CC treatments a set of five N application rates (0, 60, 120, 180, and 240 kg N ha-1) were included on plots under winter fallow (WF). The winter CC supplied plant-available N to the subsequent maize crop varying from 25 to 53 kg N ha-1 with BO and WL, respectively. The mix of CC varied less in N supply (38-42 kg N ha-1). Soil cover and weed suppression varied between CC. The results suggest that BO can be used to attain rapid soil cover. Black oats also provided better soil cover after CC flattening, likely due to the higher C:N ratio and slower residue decomposition. The higher C:N ratio may result in some N immobilization and reduced plant available N to the maize crop. However, BO also showed great weed suppression. Mixing CC is an alternative to merge the benefits of the individual species, enhancing the overall ecosystem services provided by them.
覆盖作物和轮作是可持续作物生产系统的关键组成部分。本研究的目的是(1)评价冬季CC对后续玉米作物氮素供应的影响;(2)评价CC对土壤覆盖和杂草种群的影响。对3种冬季CC进行了评价:黑燕麦(BO)、白露苹(WL)和油籽萝卜(OR)，分别作为单一种和混合种。三种CC混合料包括:BO+WL;博+或;或+西城。除CC处理外，在冬季休耕(WF)条件下还设置了5个施氮量(0、60、120、180和240 kg N hm -1)。冬季CC分别以BO和WL向后续玉米作物提供25 ~ 53 kg N hm -1的植株有效氮。混合CC在供氮量上变化较小(38 ~ 42 kg N hm -1)。土壤覆盖和杂草抑制在不同CC间存在差异，表明BO可以实现快速的土壤覆盖。黑燕麦在CC压扁后也提供了更好的土壤覆盖，可能是由于较高的碳氮比和较慢的残留物分解。较高的碳氮比可能导致玉米作物部分氮的固定和植株有效氮的减少。但BO对杂草的抑制作用也很明显。混合CC是将单个物种的利益合并在一起的另一种选择，增强了它们提供的整体生态系统服务。
{"title":"Winter cover crops influence weed establishment and nitrogen supply to maize","authors":"H. A. G. Villalba, D. R. Diaz, E. L. Schoninger, Carlos Andrés Leguizamón Rojas","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109","url":null,"abstract":"Cover crops (CC) and crop rotation are key components of a sustainable crop production system. The objectives of this study were to (i) evaluate the effect of winter CC on nitrogen (N) supply to the subsequent maize crop, and to (ii) evaluate the effect of CC on soil cover and weed population. Three winter CC were evaluated: black oat (BO) (Avena strigosa Schieb), white lupin (WL) (Lupinus albus), and oilseed radish (OR) (Raphanus sativus L.), as single species and in a mix. The three CC mixes included: BO+WL; BO+OR; and OR+WL. In addition to CC treatments a set of five N application rates (0, 60, 120, 180, and 240 kg N ha-1) were included on plots under winter fallow (WF). The winter CC supplied plant-available N to the subsequent maize crop varying from 25 to 53 kg N ha-1 with BO and WL, respectively. The mix of CC varied less in N supply (38-42 kg N ha-1). Soil cover and weed suppression varied between CC. The results suggest that BO can be used to attain rapid soil cover. Black oats also provided better soil cover after CC flattening, likely due to the higher C:N ratio and slower residue decomposition. The higher C:N ratio may result in some N immobilization and reduced plant available N to the maize crop. However, BO also showed great weed suppression. Mixing CC is an alternative to merge the benefits of the individual species, enhancing the overall ecosystem services provided by them.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547615","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}
Pub Date : 2018-12-30DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99
Ramón Fogel
This article analyzes the traditional knowledge about the alleged medicinal properties of plants and their uses as part of the Commons having the protection of domestic law and international law. The uses of these plants are considered by ethnic indigenous Mbya Guarani and Paĩ Tavyterã of the Western region of Paraguay. Articles published in scientific journals in the region and in high-impact scientific journals are used as basically bibliographic research. Likewise, it was taken in advantage information contained in patent Patenscope databases. On the exploitation of these secondary data, it was taken into consideration, the result of ethnographic work in the region. Over 86 selected plants and considering the species in the investigation were registered 4,668 patents applied for and 2,715 granted patents; The National Directorate of Intellectual Property (Dirección Nacional de Propiedad Intelectual DINAPI) does not register patent applications from residents. It was found that large pharmaceutical corporations and food industry do not recognize the fair and equitable compensation established in treaties. To this extent it can be assumed that these corporations respond to the logic of accumulation by dispossession of common goods.
本文分析了关于植物的所谓药用特性及其作为国内法和国际法保护的公地的一部分的用途的传统知识。这些植物的用途被巴拉圭西部地区的土著民族Mbya Guarani和paoko Tavyterã所考虑。发表在本地区科学期刊和高影响力科学期刊上的文章基本上被用作书目研究。同样，它也利用了Patenscope数据库中包含的信息。在利用这些二手数据时，考虑到了该地区民族志工作的结果。经筛选的86种植物，考虑到调查物种，已注册专利4668项，授权专利2715项;国家知识产权局(Dirección Nacional de Propiedad Intellectual DINAPI)不对居民的专利申请进行注册。调查发现，大型制药公司和食品工业不承认条约中规定的公平和公平的赔偿。在这个程度上，我们可以假设这些公司通过剥夺公共物品来回应积累的逻辑。
{"title":"Intellectual property and patents on medicinal uses and traditional knowledge","authors":"Ramón Fogel","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99","url":null,"abstract":"This article analyzes the traditional knowledge about the alleged medicinal properties of plants and their uses as part of the Commons having the protection of domestic law and international law. The uses of these plants are considered by ethnic indigenous Mbya Guarani and Paĩ Tavyterã of the Western region of Paraguay. Articles published in scientific journals in the region and in high-impact scientific journals are used as basically bibliographic research. Likewise, it was taken in advantage information contained in patent Patenscope databases. On the exploitation of these secondary data, it was taken into consideration, the result of ethnographic work in the region. Over 86 selected plants and considering the species in the investigation were registered 4,668 patents applied for and 2,715 granted patents; The National Directorate of Intellectual Property (Dirección Nacional de Propiedad Intelectual DINAPI) does not register patent applications from residents. It was found that large pharmaceutical corporations and food industry do not recognize the fair and equitable compensation established in treaties. To this extent it can be assumed that these corporations respond to the logic of accumulation by dispossession of common goods.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547626","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}
Pub Date : 2018-12-30DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.118-126
G. Closs, O. L. V. Villalba, W. E. Stanley Spezini, M. P. C. Marmol, L. N. B. D. Paredes, J. R. Peralta, P. G. Castellani Rumich
{"title":"Nutritional Valuation of the sesame cake by in vivo and in vitro digestibility studies in sheep","authors":"G. Closs, O. L. V. Villalba, W. E. Stanley Spezini, M. P. C. Marmol, L. N. B. D. Paredes, J. R. Peralta, P. G. Castellani Rumich","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.118-126","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.118-126","url":null,"abstract":"","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46936735","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}
Pub Date : 2018-12-30DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.136-142
N. Duarte, A. F. Silva, M. M. Schlindwein, B. Mendoza
{"title":"Family Farming: an analysis of the production of traditional crops in the Department of Concepción - Paraguay","authors":"N. Duarte, A. F. Silva, M. M. Schlindwein, B. Mendoza","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.136-142","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.136-142","url":null,"abstract":"","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46962036","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}
Pub Date : 2018-12-30DOI: 10.18004/investig.agrar.2018.diciembre.143-145
M. Ramírez, O. Arias, Natalia de Jesús Zelada, V. A. Gomez, G. D. Moraes
{"title":"First record of the mite Dichopelmus notus (Acari: Eriophyidae) in mate - tea crop from Tavaí, Caazapá, Paraguay","authors":"M. Ramírez, O. Arias, Natalia de Jesús Zelada, V. A. Gomez, G. D. Moraes","doi":"10.18004/investig.agrar.2018.diciembre.143-145","DOIUrl":"https://doi.org/10.18004/investig.agrar.2018.diciembre.143-145","url":null,"abstract":"","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45650748","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}
Pub Date : 2018-06-30DOI: 10.18004/investig.agrar.2018.junio.1-10
Diego Avilio Ocampos Olmedo, D. Medina, Luis Alberto Alonzo Griffith, Carlos Alberto Lezcano
{"title":"Replacing corn by dried citrus pulp in diets for lambs: productive performance and characteristics of non-carcass components","authors":"Diego Avilio Ocampos Olmedo, D. Medina, Luis Alberto Alonzo Griffith, Carlos Alberto Lezcano","doi":"10.18004/investig.agrar.2018.junio.1-10","DOIUrl":"https://doi.org/10.18004/investig.agrar.2018.junio.1-10","url":null,"abstract":"","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547657","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}
Pub Date : 2018-06-30DOI: 10.18004/investig.agrar.2018.junio.58-66
G. A. Villalba Duré, Gilberto Antonio Benítez Rodas, Karina Beatriz Núñez Goralewski
{"title":"Influence of environmental factors on the zooplankton community of the artificial lagoons in Ñu Guasú Park, Central Department, Paraguay","authors":"G. A. Villalba Duré, Gilberto Antonio Benítez Rodas, Karina Beatriz Núñez Goralewski","doi":"10.18004/investig.agrar.2018.junio.58-66","DOIUrl":"https://doi.org/10.18004/investig.agrar.2018.junio.58-66","url":null,"abstract":"","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547666","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}
The Helicoverpa armigera (Noctuidae: Heliothinae) is a polyphagous and cosmopolitan pest distributed throughout South America. The objective of this research was to identify by PCR-RFLP molecular analysis, the presence of H. armigera in the Amambay region in Paraguay. Delta traps with sexual pheromone were deployed in the 2016/2017 season soybean crop distributed at the following locations: Pedro Juan Caballero, Zanja Pyta, Capitan Bado, Karapa’ĩ and Bella Vista Norte. Sampling cloth was used for collecting caterpillars. The collected specimens were sorted by external morphological characters, individualized in labeled jars containing pure alcohol. 24 samples were sent to the Arthropods Molecular Ecology Laboratory ESALQ/USP for identification by PCR-RFLP molecular analysis. Ten specimens of H. armigera belonging to Fortuna and Zanja Pyta were identified. Ten other specimens were identified as H. zea belonging to Cerro Cora'i, Captain Bado, Cerro Kuatia and Karapa’ĩ. The remaining four samples did not amplify by PCR-RFLP. The analysis revealed the occurrence of H. armigera in soybean and maize crops in the northern region of Paraguay.
棉铃虫(夜蛾科:棉铃虫科)是一种多食性的世界性害虫，分布在南美洲各地。本研究的目的是通过PCR-RFLP分子分析，鉴定在巴拉圭Amambay地区存在的棉铃虫。在2016/2017年度大豆作物中部署了带有性信息素的诱捕器，分布在以下地点:Pedro Juan Caballero、Zanja Pyta、Capitan Bado、Karapa ' kio和Bella Vista Norte。采用取样布采集毛虫。收集的标本根据外部形态特征进行分类，在装有纯酒精的标记瓶中进行个体化。24份样品送交节肢动物分子生态学实验室ESALQ/USP进行PCR-RFLP分子分析鉴定。鉴定了10个棉铃虫标本，分别属于Fortuna和Zanja Pyta。另外10个标本被鉴定为玉米蚜，属于Cerro Cora'i、Captain Bado、Cerro Kuatia和Karapa ' kung。其余4份样品均未经PCR-RFLP扩增。分析结果表明，在巴拉圭北部地区的大豆和玉米作物中存在着棉铃虫。
{"title":"Identificación molecular de Helicoverpa armígera (Noctuidae: Heliothinae) en el departamento de Amambay, Paraguay","authors":"Marcos Arturo Ferreira Aguero, Enson Gusman Sosa, Osmar Arias","doi":"10.18004/INVESTIG.AGRAR.2018.JUNIO.84-90","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.JUNIO.84-90","url":null,"abstract":"The Helicoverpa armigera (Noctuidae: Heliothinae) is a polyphagous and cosmopolitan pest distributed throughout South America. The objective of this research was to identify by PCR-RFLP molecular analysis, the presence of H. armigera in the Amambay region in Paraguay. Delta traps with sexual pheromone were deployed in the 2016/2017 season soybean crop distributed at the following locations: Pedro Juan Caballero, Zanja Pyta, Capitan Bado, Karapa’ĩ and Bella Vista Norte. Sampling cloth was used for collecting caterpillars. The collected specimens were sorted by external morphological characters, individualized in labeled jars containing pure alcohol. 24 samples were sent to the Arthropods Molecular Ecology Laboratory ESALQ/USP for identification by PCR-RFLP molecular analysis. Ten specimens of H. armigera belonging to Fortuna and Zanja Pyta were identified. Ten other specimens were identified as H. zea belonging to Cerro Cora'i, Captain Bado, Cerro Kuatia and Karapa’ĩ. The remaining four samples did not amplify by PCR-RFLP. The analysis revealed the occurrence of H. armigera in soybean and maize crops in the northern region of Paraguay.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45510273","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}
Pub Date : 2018-06-30DOI: 10.18004/investig.agrar.2018.junio.67-73
L. F. Watzlawick, Filemon Mokochinski, Luis Corrales, L. Zerbielli, Régis Villanova Longhi
This study aim to evaluate the dynamics of the main tree species in a seasonal steppe savannah community, located in the Espinilho Park, Barra do Quaraí RS, throughout a period of eight years (2001-2009). From information on the dynamics, it is possible to assess changes in vegetation structure, based on mortality, recruitment and growth rates of its individuals. Permanent sample plots of 1 ha (100 x 100 m), divided into subunits of 100 m2 (10 x 10 m) were established for data collection. All trees with diameter at breast height (DBH) ≥ 10 cm were measured. Throughout the study period, 178 individuals from eight different species were recorded. The species Aspidosperma quebracho-blanco, Vachellia caven, Prosopis nigra and Prosopis affinis represent 82.58% of all individuals, which 54.49% comprise Prosopis genus only. Individuals were distributed in eight diameter classes, although 91.57% of them were from the first three diameter classes. An annual recruitment rate of 1.61% and a 0.70% mortality rate were observed. The average increase in DBH between the years 2001 and 2009 was 0.053 cm/year. The studied area showed a change in the dynamics with an annual recruitment rate greater than the mortality, indicating that the community is still growing.
{"title":"Arboreal vegetation dynamics of the Estepa Seasonal Sabana in the Espinillo State Park","authors":"L. F. Watzlawick, Filemon Mokochinski, Luis Corrales, L. Zerbielli, Régis Villanova Longhi","doi":"10.18004/investig.agrar.2018.junio.67-73","DOIUrl":"https://doi.org/10.18004/investig.agrar.2018.junio.67-73","url":null,"abstract":"This study aim to evaluate the dynamics of the main tree species in a seasonal steppe savannah community, located in the Espinilho Park, Barra do Quaraí RS, throughout a period of eight years (2001-2009). From information on the dynamics, it is possible to assess changes in vegetation structure, based on mortality, recruitment and growth rates of its individuals. Permanent sample plots of 1 ha (100 x 100 m), divided into subunits of 100 m2 (10 x 10 m) were established for data collection. All trees with diameter at breast height (DBH) ≥ 10 cm were measured. Throughout the study period, 178 individuals from eight different species were recorded. The species Aspidosperma quebracho-blanco, Vachellia caven, Prosopis nigra and Prosopis affinis represent 82.58% of all individuals, which 54.49% comprise Prosopis genus only. Individuals were distributed in eight diameter classes, although 91.57% of them were from the first three diameter classes. An annual recruitment rate of 1.61% and a 0.70% mortality rate were observed. The average increase in DBH between the years 2001 and 2009 was 0.053 cm/year. The studied area showed a change in the dynamics with an annual recruitment rate greater than the mortality, indicating that the community is still growing.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48261397","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}
Pub Date : 2018-06-30DOI: 10.18004/INVESTIG.AGRAR.2018.JUNIO.78-83
Rebeca González Torres, L. G. Segnana, O. Arias, María Bernarda Ramírez De López
In agroecosystems, there are natural enemies controlling cereal aphids, regulating their population. The study of identification and quantification is important for the integrated pest management of wheat. The research aims to identify families of predators and aphid parasitoids present in wheat crops in the departments of; Alto Paraná, Itapúa, Caaguazú and San Pedro. The insects were collected weekly from Moericke traps installed in wheat crops, from the beginning of emergence of the seedlings to the final stage, between May and October 2014. Nine species of parasitoids were identified, Lysiphlebustestaceipes, Ephedrusplagiator, Praongallicum, Praonvolucre, Aphidiuscolemani, Aphidiuspicipes, Aphidiuservi, Aphidiusuzbekistanicus, Aphidiusrhopalosiphi and four families of predators of Hemerobiidae, Coccinellidae. Coenagrionidae, Chrysopidae.
{"title":"Natural enemies of aphids (Hemiptera: Aphididae) present in wheat growing areas in Paraguay","authors":"Rebeca González Torres, L. G. Segnana, O. Arias, María Bernarda Ramírez De López","doi":"10.18004/INVESTIG.AGRAR.2018.JUNIO.78-83","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.JUNIO.78-83","url":null,"abstract":"In agroecosystems, there are natural enemies controlling cereal aphids, regulating their population. The study of identification and quantification is important for the integrated pest management of wheat. The research aims to identify families of predators and aphid parasitoids present in wheat crops in the departments of; Alto Paraná, Itapúa, Caaguazú and San Pedro. The insects were collected weekly from Moericke traps installed in wheat crops, from the beginning of emergence of the seedlings to the final stage, between May and October 2014. Nine species of parasitoids were identified, Lysiphlebustestaceipes, Ephedrusplagiator, Praongallicum, Praonvolucre, Aphidiuscolemani, Aphidiuspicipes, Aphidiuservi, Aphidiusuzbekistanicus, Aphidiusrhopalosiphi and four families of predators of Hemerobiidae, Coccinellidae. Coenagrionidae, Chrysopidae.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42190037","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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