Peruvian Journal of Agronomy最新文献_第6页

Falling of asparagus flowers (Asparagus officinalis Linneo.) for the handling of Prodiplosis longifila Gagné in the irrigation of the Chavimochic project 在查维莫克工程灌溉中处理长叶竹的芦笋花的掉落

Peruvian Journal of Agronomy Pub Date : 2018-12-29 DOI: 10.21704/PJA.V2I1.1198

S. Prado, J. Castillo, S. Rodríguez

{"title":"Falling of asparagus flowers (Asparagus officinalis Linneo.) for the handling of Prodiplosis longifila Gagné in the irrigation of the Chavimochic project","authors":"S. Prado, J. Castillo, S. Rodríguez","doi":"10.21704/PJA.V2I1.1198","DOIUrl":"https://doi.org/10.21704/PJA.V2I1.1198","url":null,"abstract":"The asparagus, a dioecious plant, usually includes plants of both sexes, though also hermaphrodite ones. The male inflorescences are frequented by adult Prodiplosis longifila, who lay such large amounts of eggs on them that its populations can reach millions of individuals over a lapse of 20 to 30 days, which is the plant regular flowering period. The field investigation took place in two locations: (i) the Irrigation Research Unit of the Universidad Nacional Agraria La Molina (UNALM) and (ii) properties of the Agricultural Society of Viru (SAVSA). The number of fallen flowers and larvae per bud after applying multiple treatments on asparagus plots of the two locations was counted to determine the best concentration and application time of various fertilizers to induce the highest percentage of flower fall to manage P. longifila populations. In the UNALM the fertilizer B Dose 2 generated the highest percentage of fallen flowers, 82.1 % ± 14.85 %, and the fertilizer C Dose 1 caused 74.94 % ± 13.78 %. In SAVSA the fertilizer B Dose 3 made a percentage of fallen flowers of 50.6 % ± 21.56 % and fertilizer B Dose 2, 49.85 % ± 16.28 %. The average number of P. longifila 2nd-stage larvae, evaluated on fifteen flowers and in three moments was 3.9 larvae. Foliar fertilizers applications affected both male and female flowers almost equally in all treatments, percentage-wise. Foliar fertilizers promote asparagus flowers falling, consequently contribute to a significative reduction of P. longifila populations, due to a larvae exposition to rapid desiccation under the sun.","PeriodicalId":283246,"journal":{"name":"Peruvian Journal of Agronomy","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128587995","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

Sustainability of lemon (Citrus aurantifolia Swingle) farms in the province of Santa Elena, Ecuador 厄瓜多尔圣埃琳娜省柠檬(Citrus aurantifolia Swingle)农场的可持续性

Peruvian Journal of Agronomy Pub Date : 2018-12-29 DOI: 10.21704/PJA.V2I3.1210

M. Santistevan, R. Borjas, L. Alvarado, V. Anzules, V. Castro, A. Julca

引用次数: 4

Characterization of banana farms (Musa spp.) in Cuyani Microbasin, Pichanaki District, Chanchamayo Province (Junín, Perú) Chanchamayo省Pichanaki地区Cuyani Microbasin香蕉农场(Musa种)的特征(Junín, Perú)

Peruvian Journal of Agronomy Pub Date : 2018-09-17 DOI: 10.21704/PJA.V2I2.1200

J. Maraví, O. Buendia, L. Alvarado, R. Borjas, V. Castro, A. Julca

{"title":"Characterization of banana farms (Musa spp.) in Cuyani Microbasin, Pichanaki District, Chanchamayo Province (Junín, Perú)","authors":"J. Maraví, O. Buendia, L. Alvarado, R. Borjas, V. Castro, A. Julca","doi":"10.21704/PJA.V2I2.1200","DOIUrl":"https://doi.org/10.21704/PJA.V2I2.1200","url":null,"abstract":"The objective of this study was to characterize banana farms in the Cuyani Microbasin in the district of Pichanaki, Chanchamayo province (Junin, Peru). We worked with a producer organization that has 400 partners, of which a sample was taken (n = 80) using the proportions method. It was found that the banana farms are very diverse, the person in charge is mostly a man, but there is an interesting percentage of the female gender in the administration of the farms. In general, producers have a basic educational level. The production system is traditional, the banana is grown alone or associated with other crops, such as coffee. Most producers consider that pests and diseases are the main factors limiting production, since they reduce yields and increase production costs. The farms were classified in five groups, the most important of which was 45% of the farms whose owner is a male, between 44 and 56 years old, with secondary education, who lives on the same farm. They do not have a property title, the house does not have basic services, and they have poultry and guinea pigs. They have 2 to 3 hectares of banana (cultivars: Island and Palillo, 600 to 1000 plants/ha). Its production costs are between 2000 and 3600 soles and a yield of 6.5 to 7.5 t/ha. The cultivar Isla is the most common but also the cultivars Palillo, Morado and Biscocho are planted.","PeriodicalId":283246,"journal":{"name":"Peruvian Journal of Agronomy","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114186525","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

Morphological and molecular identification of Phytophthora cinnamomi Rands as causal agent of Crown and root rot in Blueberry (Vaccinium corymbosum) in Peru 秘鲁蓝莓(Vaccinium corymbosum)冠腐病和根腐病病原肉桂疫霉的形态和分子鉴定

Peruvian Journal of Agronomy Pub Date : 2018-09-17 DOI: 10.21704/PJA.V2I2.1202

M. Huarhua, J. Flores, R. Acuña, W. Apaza

{"title":"Morphological and molecular identification of Phytophthora cinnamomi Rands as causal agent of Crown and root rot in Blueberry (Vaccinium corymbosum) in Peru","authors":"M. Huarhua, J. Flores, R. Acuña, W. Apaza","doi":"10.21704/PJA.V2I2.1202","DOIUrl":"https://doi.org/10.21704/PJA.V2I2.1202","url":null,"abstract":"The Blueberry production in Peru has had rapid growth in the last five years, from having no area of more than 3050 hectares at present. As a result of this increase, many pathologic plant problems have appeared among them Phytophthora sp. causing plants with symptoms of wilt, reddish of lower leaves, regressive death, rotting of roots and crown of different production areas of Peru. However, there is no identification reported in Peru. Therefore, this study was conducted in the Plant Pathology Clinic of the Universidad Nacional Agraria La Molina with the objective of to identify the species of Phytophthora causing Crown and root rot isolated from blueberry in Peru. Four isolates from the blueberry´s field were identified by morphological, molecular and pathogenically features. All the isolates formed corralled-type colonies with hyphal swelling on PDA and V-8 agar and produced obpyriform or ellipsoidal sporangia and globes chlamydospores. The internal transcribed spacer (ITS) of rDNA was amplified and sequenced with primer ITS1/ITS4 to confirm the identification, All the ITS nucleotide sequences from isolated obtained were submitted at GenBank of NCBI (Number Accession MH777152 to isolate AR-1, MH777151 to isolate AR-2, MH777150 to isolate AR-4, and MH777149 to isolate AR-3). Each one of the sequences showed 100% of homology with sequences of reference of P. cinnamomi in GenBank. Pathogenicity tests showed symptoms of redness and yellowing and root and Crown rot on Blueberry cv. Biloxi after 30 days of inoculation. Finally, concluded that P. cinnamomi is the species causing Crown and root rot in Blueberry in Peru. To our knowledge, this is the first report of P. cinnamomi on blueberry in Peru.","PeriodicalId":283246,"journal":{"name":"Peruvian Journal of Agronomy","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131920725","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: 6

Insect pests associated with Andean lupin (Lupinus mutabilis Sweet) and their parasitoids in Peruvian central coast – (Lima, La Molina) 秘鲁中部海岸(利马，拉莫利纳)与安第斯露平(Lupinus mutabilis Sweet)及其拟寄生物有关的害虫

Peruvian Journal of Agronomy Pub Date : 2018-09-10 DOI: 10.21704/PJA.V2I2.1199

Y. Callohuari, Clorinda E. Vergara, Jorge E. Jiménez

{"title":"Insect pests associated with Andean lupin (Lupinus mutabilis Sweet) and their parasitoids in Peruvian central coast – (Lima, La Molina)","authors":"Y. Callohuari, Clorinda E. Vergara, Jorge E. Jiménez","doi":"10.21704/PJA.V2I2.1199","DOIUrl":"https://doi.org/10.21704/PJA.V2I2.1199","url":null,"abstract":"This survey aimed to determine the insect pests associated with Andean lupin ( Lupinus mutabilis Sweet) and its parasitoids, under Peruvian central coast conditions. Sampling was made every seven days with the following methods: linear meter evaluations, plant organ evaluations, pitfall traps, and beating trays. Infested plant organs were taken to the laboratory for adult insect recovery (phytophagous or parasitoids). Pitfall traps and beating tray samples were also processed and stored. During the survey, 14,051 individuals belonging to 11 orders and 91 families were recorded. Insects that infested Andean lupin were Melanagromyza lini Spencer (stem borer), Liriomyza huidobrensis (Blanchard) (leafminer), Crocidosema aporema (Walsingham) (budborer), Grammopsoides tenuicornis (Casey) (stem borer) and Frankliniella occidentalis (Pergande) (bud and flower thrips). Diglyphus websteri (Crawford), D. begini (Ashmead), Chrysocharis flacilla (Walker), C. caribea Boucek, Chrysocharis sp. and Halticoptera arduine (Walker) were recorded as parasitoids of L. huidobrensis , whereas Carcelia sp. was recorded for C. aporema .","PeriodicalId":283246,"journal":{"name":"Peruvian Journal of Agronomy","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125439698","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: 3

Application of nitrogen fertilizer in maize in Southern Asia: a review 南亚地区玉米氮肥应用研究进展

Peruvian Journal of Agronomy Pub Date : 2018-09-10 DOI: 10.21704/PJA.V2I2.1201

Jiban Shrestha, A. Chaudhary, D. Pokhrel

引用次数: 17

Allometric models for non-destructive leaf area estimation in Eugenia uniflora (L.) 单叶Eugenia uniflora (L.)非破坏性叶面积估算的异速生长模型

Peruvian Journal of Agronomy Pub Date : 2018-06-14 DOI: 10.21704/PJA.V2I2.1133

M. F. Pommpelli, J. M. Figueiroa, Flavio Lozano-Isla

引用次数: 1