Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.最新文献_第8页

Combining ability in maize hybrid for yield-related traits and silage production 玉米杂交种产量相关性状配合力及青贮生产

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2700

Flávia Nicácio Viana, Jocarla Ambrosim Crevelari, Gabriel Moreno Bernardo Gonçalves, José Arantes Ferreira Júnior, De Franca, M. G. Pereira, A. T. A. Junior

{"title":"Combining ability in maize hybrid for yield-related traits and silage production","authors":"Flávia Nicácio Viana, Jocarla Ambrosim Crevelari, Gabriel Moreno Bernardo Gonçalves, José Arantes Ferreira Júnior, De Franca, M. G. Pereira, A. T. A. Junior","doi":"10.21475/AJCS.20.14.12.2700","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2700","url":null,"abstract":"Maize cultivars developed for silage production are desirable because ensiling enables the production of high-quality feed and, increases farmers profit. Diallel cross is an efficient and advantageous mating technique that allows the selection of the best parents and crossings. The objective of this study was to estimate the general combining ability (GCA) and specific combining ability (SCA) of hybrids and their parents and to evaluate promising hybrid crosses that can be used in breeding programs. Six genotypes were crossed in a complete diallel system. Fifteen hybrid combinations, six parents, and three commercial controls were evaluated in the 2017/2018 growing season in the north and northwest regions of Rio de Janeiro state, Brazil. Nine agronomic traits were analyzed at the silage stage: plant and ear height, stem diameter, stand, husk covering, number of cobs, husked ear weight, unhusked ear weight, and fresh mass yield. The study employed a completely randomized block design with four repetitions. The parents UENF 2210, Piranão 12, and UENF 2208 presented higher GCA values for fresh matter yield and were indicated for the generation of single cross (F1) hybrids. The parental combinations of UENF 2208  Piranão 12, UENF 2208  UENF 2205, and UENF 2209  UENF 2205 had high SCA for most of the evaluated traits and were promising for the use in breeding programs. The crosses with higher average yield were UENF 2208  Piranão 12, UENF 2210  Piranão 12, and UENF 2208  UENF 2205","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"1118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76782262","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

Edaphic invertebrate macrofauna associated with cassava crop in different soil coverages 不同土壤覆盖度下与木薯作物相关的大型无脊椎动物

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2822

N. D. F. Guimarães, A. A. Otsubo, R. A. Garcia, A. D. S. Gallo, E. M. Carvalho, Rogério Ferreira da Silva

{"title":"Edaphic invertebrate macrofauna associated with cassava crop in different soil coverages","authors":"N. D. F. Guimarães, A. A. Otsubo, R. A. Garcia, A. D. S. Gallo, E. M. Carvalho, Rogério Ferreira da Silva","doi":"10.21475/AJCS.20.14.12.2822","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2822","url":null,"abstract":"This study aimed to identify and assess the edaphic invertebrate macrofauna associated with cassava crop in succession to different soil coverages. The experimental design was randomized blocks as 6 x 3 factorial design with four replications. The first factor was soil cover cultivated from December 2014 to April 2015 (fallow, pearl millet, forage sorghum, Crotalaria ochroleuca, Urochloa ruziziensis and Corn+Urochloa ruziziensis). The second factor was sampling periods (March/2015, October/2015 and June/2016). We sampled four blocks of 0.25 x 0.25 x 0.20 m in each system, following the TSBF (Tropical Soil Biology and Fertility) collection method. The taxonomic composition and abundance of organisms, richness of groups and the diversity indexes of Shannon, Pielou equitability and Simpson dominance were evaluated. There was no interaction between the factors (soil cover x season) for the variables studied. There was difference in the dominance of organisms according to the soil cover (isolated), being the highest index (0.44) obtained by previous cultivation of forage sorghum. The abundance of organisms, group richness and diversity index were influenced by sampling period, demonstrating the influence of seasonality on the invertebrate macrofauna community of the soil","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81208880","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

Effects of plant density on growth, yield and seed quality of quinoa genotypes under rain-fed conditions on red basalt soil regions 红玄武岩区雨养条件下种植密度对藜麦基因型生长、产量和种子品质的影响

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2849

N. Minh, D. Hoang, N. V. Lộc, Nguyen Viet Long

{"title":"Effects of plant density on growth, yield and seed quality of quinoa genotypes under rain-fed conditions on red basalt soil regions","authors":"N. Minh, D. Hoang, N. V. Lộc, Nguyen Viet Long","doi":"10.21475/AJCS.20.14.12.2849","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2849","url":null,"abstract":"Because of rainfall shortage, quinoa has the potential to supersede traditional crops that contribute to agricultural production less effectively. The current study determined the quinoa genotypes and plant density suitable for production under rain-fed conditions in red basalt soil regions. The experiments were conducted in the rainy and dry seasons of 2018/2019 using split-plot designs with three replications. In these, the main factor consisted of four quinoa genotypes and the subfactor four plant densities (13.3, 10.0, 8.0 and 6.6 plants m-2) with a row interval of 50cm and a plant interval of 15, 20, 25 and 30cm, respectively. The current study’s results showed that plant density significantly affected polynomial trends on panicle length, panicle number/plant, seed number/panicle, 1000-seed weight, seed yield, protein content, and ash content. The plant density of 8.0 plants m-2 seems to be the optimal density for quinoa under the studied conditions. Results here also indicate significant differences among quinoa genotypes for agronomical and seed quality performance. Better performances of quinoa occurred in the dry season compared to the rainy season. Atlas and Cahuil were the best adaptive quinoa genotypes in the red basalt soil regions","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90781472","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: 7

Genetic diversity among tropical maize inbred lines as revealed by SSR markers SSR标记分析热带玉米自交系的遗传多样性

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.1589.PDF

Maizura Abu Sin, G. Saleh, N. Abdullah, P. Kashiani

{"title":"Genetic diversity among tropical maize inbred lines as revealed by SSR markers","authors":"Maizura Abu Sin, G. Saleh, N. Abdullah, P. Kashiani","doi":"10.21475/AJCS.20.14.12.1589.PDF","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.1589.PDF","url":null,"abstract":"Genetic diversity and phenotypic superiority are important attributes of parental inbred lines for use in hybrid breeding programs. In this study, genetic diversity among 30 maize (Zea mays L.) inbred lines comprising of 28 introductions from the International Maize and Wheat Improvement Center (CIMMYT), one from Indonesia and a locally developed, were evaluated using 100 simple sequence repeat (SSR) markers, as early screening for potential parents of hybrid varieties. All markers were polymorphic, with a total of 550 unique alleles detected on the 100 loci from the 30 inbred lines. Allelic richness ranged from 2 to 13 per locus, with an average of 5.50 alleles (na). Number of effective alleles (ne) was 3.75 per locus, indicating their high effectiveness in revealing diversity among inbred lines. Average polymorphic information content (PIC) was 0.624, with values ranging from 0.178 to 0.874, indicating high informativeness of the markers. High gene diversity was observed on Chromosomes 8 and 4, with high number of effective alleles, indicating their potential usefulness for QTL analysis. The UPGMA dendrogram constructed identified four heterotic groups within a similarity index of 0.350, indicating that these markers were able to group the inbred lines. The three-dimensional PCoA plot also supports the dendrogram grouping, indicating that these two methods complement each other. Inbred lines in different heterotic groups have originated from different backgrounds and population sources. Information on genetic diversity among the maize inbred lines are useful in developing strategies exploiting heterosis in breeding programs","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84145286","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

In vitro antifungal activity of Desmodium intortum and D. uncinatum root extracts against growth of toxigenic Fusarium verticillioides and Aspergillus flavus 刺槐和刺槐根提取物对产毒黄萎病镰刀菌和黄曲霉生长的体外抑菌活性研究

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2792

N. K. Njeru, C. Midega, J. Muthomi, J. Wagacha, Z. Khan

{"title":"In vitro antifungal activity of Desmodium intortum and D. uncinatum root extracts against growth of toxigenic Fusarium verticillioides and Aspergillus flavus","authors":"N. K. Njeru, C. Midega, J. Muthomi, J. Wagacha, Z. Khan","doi":"10.21475/AJCS.20.14.12.2792","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2792","url":null,"abstract":"Maize grown under push-pull cropping system has been reported to contain lower concentrations of fumonisin and aflatoxin than maize monocrop. This study determined the inhibitory effect of desmodium root extracts on spore germination and radial growth of toxigenic Aspergillus flavus and Fusarium verticillioides. Aspergillus flavus and F. verticillioides were isolated from maize and soil and tested for ability to produce aflatoxin and fumonisin by inoculation on mycotoxin-free maize. Aflatoxin and fuminisin were detected and quantified by direct competitive ELISA. Desmodium roots were dried, ground to fine powder and extracted with methanol and dichloromethane and evaluated for anti-fungal activity by inhibition of spores of A. flavus and F. verticillioides potato dextrose agar (PDA) medium. Isolates of F. verticillioides produced up to 599,741 µg/kg fumonisin while isolates of A. flavus produced up to 199,184 µg/kg aflatoxin. Desmodium root extracts reduced germination of A. flavus spores and F. verticillioides by 9.6% and 43.8%, respectively and reduced their respective colony radial growth by 15% and 57%. The results suggested that desmodium roots contain chemical compounds that inhibit growth of A. flavus and F. verticillioides. This may explain the reduction in infection of maize with mycotoxin-producing fungi before harvest in push-pull cropping systems by reducing the pathogen inoculum in the soils. Determination of the active compounds in the root exudates is recommended","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78031362","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

Quality and antioxidant activity of 'Isabel Precoce' grapes installed on different training systems and rootstocks in warmer seasons in a tropical semi-arid region 热带半干旱地区不同栽培系统和砧木在温暖季节对“Isabel Precoce”葡萄品质和抗氧化活性的影响

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2871

R. R. Costa, T. D. O. Ferreira, Antônio Augusto Marques Rodrigues, Eugenio Ribeiro de Andrade Neto, M. Lima

{"title":"Quality and antioxidant activity of 'Isabel Precoce' grapes installed on different training systems and rootstocks in warmer seasons in a tropical semi-arid region","authors":"R. R. Costa, T. D. O. Ferreira, Antônio Augusto Marques Rodrigues, Eugenio Ribeiro de Andrade Neto, M. Lima","doi":"10.21475/AJCS.20.14.12.2871","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2871","url":null,"abstract":"Production system and environmental factors might cause changes in grapevine physiology, affecting grape yield, quality, phenolic composition, and antioxidant potential. The aim of this study was to characterize the quality and antioxidant potential of 'Isabel Precoce' grapes on different training systems and rootstocks in warmer seasons, in tropical conditions. Experimental design was in randomized blocks, in sub-subplots through time and four replicates. Three training systems (overhead trellis, lyre and vertical shoot positioning - VSP) and two rootstocks (‘IAC 572’ and ‘IAC 766’) were studied in the production cycles from July to October, 2017 and from July to October, 2018 in the Submedium of São Francisco Valley. Berry weight; cluster weight; color attributes; berry resistance to compression (COMP); titratable acidity; soluble solids; total soluble sugars (TSS); yellow flavonoids; total anthocyanins; total extractable polyphenols and antioxidant activity by ABTS●+ and DPPH● free radical capture methods were analyzed. Lyre and VSP resulted on increases of 6% and 17% in berry weight and COMP, respectively. Moreover, differences between production cycles were more intense for both variables. In production cycle from July to October 2017, lyre and VSP systems provided increases of 2 g 100 g-1 of TSS and higher anthocyanin and yellow flavonoid contents, while grapes trained in VSP had higher antioxidant activity. Mean values of anthocyanins reached 529.34 mg 100 g-1 in grapes harvested in October 2017. Some grape quality and chemical components showed high variation in warmer seasons of sucessive years, according to training system or rootstock and their combinations","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76387703","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

Inheritance of resistance against Peronospora destructor in onion cv. ‘Regia’ 洋葱抗番茄孢子病菌的遗传研究。“Regia”

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2883

M. Arias, N. Curbelo, Pablo González Rabelino, E. Vicente, G. Giménez, G. Galván

{"title":"Inheritance of resistance against Peronospora destructor in onion cv. ‘Regia’","authors":"M. Arias, N. Curbelo, Pablo González Rabelino, E. Vicente, G. Giménez, G. Galván","doi":"10.21475/AJCS.20.14.12.2883","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2883","url":null,"abstract":"Onion downy mildew (DM) caused by Peronospora destructor is a very destructive leaf disease. Genetic resistance is an economic and environmentally friendly way of disease control. In this research, the segregation of DM resistance was analysed in six offspring from crosses between national cultivars and the cv. ‘Regia’, a partial resistance source. F1 plants were self-fertilised, and F1S1 derived progenies were evaluated. The segregations in DM severity were skewed towards susceptibility, with transgressive segregation in five of six progenies. The recessive inheritance could be associated with loss of susceptibility mechanisms. In another experiment, the response of advanced F1S2 lines ‘Regia’ x ‘Pantanoso del Sauce’ were evaluated two times (August and November 2017) in DM disease severity, DM histological quantitative differences, and agronomic traits. F1S2 lines, which have had an earlier selection process, presented an intermediate DM severity between the parents. Disease severity was positively correlated with histological differences in the proportion of infected stomata. ‘Regia’ presented the lowest DM severity and the highest percentage of healthy stomata. Most resistant F1S2 lines did not differ from control cultivars in bulb yield, bulb quality traits and postharvest behaviour, and could be the basis to develop a DM resistant cultivar in comparison to currently grown cultivars","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78812584","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

Application of biofertilizer in degraded pasture modified C dynamics and improved forage yield in a short-term period at the tropical region 在热带地区退化牧草中施用生物肥料在短期内改变了C动态，提高了牧草产量

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2666

P. L. Pinheiro, R. R. Passos, Anderson Lopes Peçanha, E. Mendonça

{"title":"Application of biofertilizer in degraded pasture modified C dynamics and improved forage yield in a short-term period at the tropical region","authors":"P. L. Pinheiro, R. R. Passos, Anderson Lopes Peçanha, E. Mendonça","doi":"10.21475/AJCS.20.14.12.2666","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2666","url":null,"abstract":"Recovery of degraded pastures improves the sustainability of meat and milk production systems. Humic acids (HA) and endophytic diazotrophic bacteria (EDB) are known to have bio-stimulating effects on several crops but have not been tested for the recovery of degraded pastures. The aim of the present study was to evaluate soil C and N dynamics, nutrient uptake and forage yield of Brachiaria decumbens following the foliar application of HA and EDB in a degraded pasture. A randomized block design with six replications was used. The four treatments were: HA, EDB, HA+EDB and Control. The subplots consisted of four evaluation times for soil characteristics: before treatment application (0) and 30, 60 and 120 days after treatment application (ATA). Soil total organic carbon (TOC), recalcitrant carbon (Crecal), labile carbon (Clabil), total nitrogen (TN) and C and N stocks were determined in the 0-5, 5-10, 10-20 and 20-40 cm of soil layers. Forage yield and leaf nutrient contents were evaluated at 30 days ATA. The application of the HA and EDB increased the TOC, Clabil, soil C stock (≈18%), forage dry matter yield (16 to 52%) and nutrient uptake (≈30%) after 30 days ATA. Our results showed that the application of HA combined with EDB may be a strategy for the recovery of degraded pastures in the tropical region.","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84404297","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

Potential effects of essential oil from Zanthoxylum limonella seeds against Tribolium castaneum (Coleoptera: Tenebrionidae) 柠檬花椒籽精油对黄颡鱼蛾(鞘翅目:拟甲科)的潜在防治作用

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2770

R. Wanna, Bunyaporn Satongrod

{"title":"Potential effects of essential oil from Zanthoxylum limonella seeds against Tribolium castaneum (Coleoptera: Tenebrionidae)","authors":"R. Wanna, Bunyaporn Satongrod","doi":"10.21475/AJCS.20.14.12.2770","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2770","url":null,"abstract":"Essential oils of plants with insecticidal properties have been considered as replacements for synthetic chemical pesticides to combat and control insect pests. The chemical composition of the essential oil from dried seeds of Zanthoxylum limonella Alston was determined by the Gas Chromatograph-Mass Spectrometry technique. Insecticidal activity was investigated on Tribolium castaneum Herbst using impregnated filter paper with six concentrations of essential oil at 0, 1, 2, 3, 4, and 5% for adults and larvae mortality tests, and 0, 2, 4, 6, 8 and 10% for egg mortality. All experiments were performed under completely randomized design (CRD) with four replications at 30±5°C and 70±5% relative humidity in 16:8 hours light/dark cycle. A total of 83 components were identified. The principal compounds in the essential oil of Z. limonella were beta-pinene (19.65%), 9-octadecanone (18.80%), D-limonene (9.76%), alpha-fenchene (8.48%), p-mentha-1,5,8-triene (7.16%), 1,8-cineole (6.88%), gamma-terpinene (5.46%), terpinen-4-ol (3.81%), linalool (2.73%), alpha-thujene (1.34%), decanal (1.32%), alpha-phellandrene (1.20%) and linalyl propionate (1.13%). Insecticidal activity presented that 5% of essential oil had the highest effect against T. castaneum at 120 h for adults and 48 h for larvae, while 10% of essential oil at 14 days obtained 100% mortality against eggs of T. castaneum. Results indicated that the essential oil of Z. limonella from dried seeds showed potential for use in the control of T. castaneum","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"372 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76618449","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: 4

Spatial distribution of physical attributes of a clayey Latosol under different management systems 不同管理制度下粘土红壤物理属性的空间分布

Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020. Pub Date : 2020-12-10 DOI: 10.21475/AJCS.20.14.12.2650

S. Roehrs, Aracéli Ciotti de Marins, Deonir Secco, Rogério Luís Rizzi, L. A. Z. Júnior, Pablo Chang, Claudia Borgmann, B. D. Villa, L. D. Silveira, Luciene Kazue Tokura

{"title":"Spatial distribution of physical attributes of a clayey Latosol under different management systems","authors":"S. Roehrs, Aracéli Ciotti de Marins, Deonir Secco, Rogério Luís Rizzi, L. A. Z. Júnior, Pablo Chang, Claudia Borgmann, B. D. Villa, L. D. Silveira, Luciene Kazue Tokura","doi":"10.21475/AJCS.20.14.12.2650","DOIUrl":"https://doi.org/10.21475/AJCS.20.14.12.2650","url":null,"abstract":"The use and management of the soil cause occasional changes in its physical properties; thus, altering its spatial variability. This work aimed to show the spatial distribution of physical attributes of a clay latosol under different management systems, through thematic maps of spatial distribution for values of these attributes. The experimental area consisted of three treatments: scarified no-tillage at 0.3 m depth (T1), no-tillage with 3 t ha-1 of plaster applied to the surface (T2) and; the control as traditional no-tillage system (T3). The attributes such as density, macroporosity, and microporosity in three soil layers were evaluated: 0-0.1; 0.1-0.2; and 0.2-0.3 m. The analysis of the experimental results indicates that all physical attributes presented spatial dependence between the data, with higher density values (values ranged from 0.95 to 1.37 Mg m3) and lower macroporosity in areas with T1 (SPD with scarification) and T2 (SPD gypsum) management systems. However, in all treatments, the Macro values presented a volume above 10.51%, which is above the limit value for good aeration and water movement in the soil. Treatment T3 (traditional SPD) showed favorable physical soil conditions, even after compaction","PeriodicalId":20643,"journal":{"name":"Proposed for presentation at the 2020 Virtual MRS Fall Meeting & Exhibit held November 27 - December 4, 2020.","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79372930","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