Improving ocean-glider's payload with a new generation of spectrophotometric PH sensor

Ocean gliders have clearly become nowadays useful autonomous platforms addressed to measure a wide range of seawater parameters in a more sustainable and efficient way. This new ocean monitoring approach has implied the need to develop smaller, faster and more efficient sensors without reducing key features like accuracy, resolution, time-response, among others, in order to fit the glider operational capabilities. This work is aiming to present the latest development stages of a new spectrophotometric pH sensor, its integration process into a Wave Glider SV3 platform and the preliminary results derived from an offshore mission performed in subtropical waters between the Canary Islands and Cape Verde archipelagos.Peer Reviewe

B814: Performance Evaluations of Potato Clones and Varieties in the Northeastern States - 1985

New potato clones and varieties must be tested against commercially accepted cultivars to determine If they possess advantages over existing varieties. Possible Improvements over the existing varieties could Include greater disease resistance or tolerance, higher yield, more uniform tuber size distribution, Improved storagability, good processing characteristics, etc. Often new cultivars are sought to fill local special-purpose needs. The cooperative potato variety trials reported In this bulletin were conducted to provide Information on the performance, adaptation, and performance stability of new potato clones under a wide range of geographic, climatic, soil, and cultural conditions. These tests are contributions to Regional Project NE-107 entitled, Breeding and Evaluation of New Potato Clones for the Northeast. The objectives of this regional project are: 1). To develop high quality, widely adapted, productive, pest resistant potato varieties for use In the northeast; 2). To determine regional performance, quality, and storage characteristics for promising potato clones and new varieties; 3). To evaluate promising clones and varieties for special-purpose needs such as pest outbreaks, processing, export, specialized market opportunities and/or production situations; 4). To develop management practices such as plant population, fertilizer rate, disease, weed, and Insect control strategies that will I Improve the yield and/or quality of promising clones. Data presented In this report primarily address objectives 2 and 3.https://digitalcommons.library.umaine.edu/aes_bulletin/1118/thumbnail.jp

B782: Performance Evaluations of Potato Clones and Varieties in the Northeastern States 1981

Cooperative variety trials were conducted at 33 locations to determine field, storage, and processing behavior of selected potato clones and varieties when grown under soil, climatic, and cultural conditions common to the potato growing areas of 12 cooperating States and the Province of New Brunswick, Canada. These trials are all contributions to Regional Project NE107 entitled, Breeding and Evaluation of New Potato Clones in the Northeast Area.https://digitalcommons.library.umaine.edu/aes_bulletin/1123/thumbnail.jp

B801: Performance Evaluations of Potato Clones and Varieties in the Northeastern States 1983

Cooperative potato clone and variety trials were conducted at 23 locations to determine field, storage, and processing behavior of selected clones and varieties grown under soil, climatic, and cultural management common to the potato growing areas of 13 cooperating states and the Province of New Brunswick, Canada. These tests are all contributions to Regional Project NE107 entitled, Breeding and Evaluation of New Potato Clones for the Northeast. The primary objective of this project is to determine clone stability over a wide range of soil, climate, and cultural conditions.https://digitalcommons.library.umaine.edu/aes_bulletin/1119/thumbnail.jp

Spatial ecology of closely related taxa: the case of the little shearwater complex in the North Atlantic Ocean

Este artículo contiene 21 páginas, 6 figuras, 5 tablas.Seabirds inhabiting vast water masses provide numerous examples where opposing phenomena, such as natal and breeding philopatry vs. vagility have dug cryptic taxonomic boundaries among closely related taxa. The taxonomy of little shearwaters of the North Atlantic Ocean (Little–Audubon’s shearwater complex, Puffinus assimilis–lherminieri) still remains unclear, and complementary information on non-breeding distributions and at-sea behaviour becomes essential to unravel divergent local adaptations to specific habitats. Using miniaturized light-level geolocators from seven study areas in the North Atlantic, we evaluate the spatial and habitat segregation, estimate the timing of their key life-cycle events and describe the at-sea behaviour of three taxa of these little shearwaters year-round to distinguish ecological patterns and specializations that could ultimately unravel potential lineage divergences. We also assess morphometric data from birds that were breeding at each study area to further discuss potential adaptations to specific habitats. Our results show that, while birds from different taxa segregated in space and habitats, they share ecological plasticity, similar annual phenology and diel foraging behaviour. These ecological inconsistencies, while defining the evolutionary stressors faced by these taxa, do not suggest the existence of three Evolutionary Significant Units. However, they confirm the recent evolutionary divergence among the three little shearwaters of the North Atlantic.We acknowledge the Ministerio de Economía y Competitividad (MINECO), the Fondos FEDER (CGL2009-11278/BOS, CGL2013-42585-P), the EU LIFE Programme (LIFE09 NAT/PT/000041) and the British Ornithologists’ Union for funding.RR was supported by postdoctoral contracts of the Juan de la Cierva (JCI-2012–11848) and PLEAMAR (2017/2349) programs from the Spanish MINECO and the European Maritime and Fisheries Fund (EMFF), respectively, VHP by a postdoctoral fellowship of Fundação para a Ciência e a Tecnologia (FCT; SFRH/BPD/85024/2012) and ZZ by a PhD grant (APIF-2012) from Universitat de Barcelona (Spain).Peer reviewe

Viability of a prediction system for tomato late blight in the integrated production of tomato in Caçador, Brazil Viabilidade de sistema de alerta para a requeima em produção integrada de tomate de mesa em Caçador

An alert system for tomato late blight was validated in an Integrated Production System (IP) in the 2006-2007 and 2007-2008 season in Caçador, Santa Catarina State, Brazil. The late blight is a destructive disease and demands 25 or more fungicide sprayings per season in a Conventional Production (CP) System. For the CP area, the chemical control was according to the growers' production systems and consisted of weekly sprays soon after planting. For the IP area, the criterion for the first fungicide spray was according to Machardy (1972) and for subsequent ones according to Wallin (1962), when the disease severity values (DSV) reached eight points. There was a decrease on the fungicide application in the IP, not only in the number of fungicide sprays (23-28%) but also in the amount of active ingredient (34.5-60.9%). Fungicides classified as highly toxic (class I) were not used in IP. There were no significant differences among the use of alert system on IP and the weekly schedules on CP with regard to final disease severity in the 2006-2007 season, but it was significantly lower in the second trial on plants for IP area. The IP system significantly increased tomato yield (7.6-25.5%) compared with CP system and reduced fungicide cost up to US$539/ha. The use of alert system could be a valuable and affordable tool in managing tomato late blight in Integrated Production of tomatoes in Caçador.<br>O presente trabalho teve como objetivo avaliar um sistema de alerta para a requeima do tomateiro (Phytophthora infestans) sob cultivo em Produção Integrada (PI) de tomate de mesa comparativamente à Produção Convencional (PC). A requeima é uma doença destrutiva e anualmente demanda 25 ou mais pulverizações com fungicidas para seu controle na Produção Convencional (PC). O experimento foi instalado em 2006-2007 e 2007-2008, em Caçador (SC) com as cultivares Alambra e Paronset, respectivamente. Na área da PC o controle químico da requeima foi semanal e iniciado logo após o transplante conforme a prática corrente na região. Na área da PI, o critério para a primeira pulverização foi o de Machardy (1972) e as subseqüentes, conforme Wallin (1962) quando o valor de severidade da doença (VSD) atingiu oito pontos. Nos dois ciclos, houve um decréscimo na aplicação de fungicidas, não somente no número de aplicação (23$ 960,00/ha. O uso do sistema de alerta mostrou ser uma valiosa ferramenta no manejo da requeima em sistema de produção integrada de tomate de mesa