To see the other types of publications on this topic, follow the link: Larves – Physiologie.
Journal articles on the topic 'Larves – Physiologie'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 21 journal articles for your research on the topic 'Larves – Physiologie.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Bernard, J. A., P. Ritleng, A. Ducasse, V. Ameline, and F. Mann. "Physiologie de l'excrétion des larmes : les voies lacrymales." EMC - Ophtalmologie 5, no. 2 (January 2008): 1–12. http://dx.doi.org/10.1016/s0246-0343(08)44159-x.
Full text
2
Gebara, A., and D. de Oliveira. "PREMIÈRE MENTION DE CULEX TARSALIS (DIPTERA: CULICIDAE) AU QUÉBEC." Canadian Entomologist 118, no. 6 (June 1986): 609. http://dx.doi.org/10.4039/ent118609-6.
Full textAbstract:
La poursuite de l'échantillonnage de Culicides larvaires afin de déterminer la colonisation par les populations de moustiques d'un gîte nouvellement aménagé, nous a permis de capturer deux larves de Culex tarsalis Coquillett le 28 août 1984. Il s'agit de la première mention de cette espèce au Québec.
3
Nechaev, I. V., and D. S. Pavlov. "The phenomenon of splitting of fish embryos and larvaes into two phenotypes." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 124 (August 1999): S91. http://dx.doi.org/10.1016/s1095-6433(99)90358-6.
Full text
4
Bonnet, Cédrick. "Contrôle postural de patients parkinsoniens lors d’observations libres de larges images." Neurophysiologie Clinique 47, no. 5-6 (December 2017): 350–51. http://dx.doi.org/10.1016/j.neucli.2017.10.037.
Full text
5
Goettel, Mark S., Grant M. Duke, and D. Wayne Goerzen. "PATHOGENICITY OF ASCOSPHAERA LARVIS TO LARVAE OF THE ALFALFA LEAFCUTTING BEE, MEGACHILE ROTUNDATA." Canadian Entomologist 129, no. 6 (December 1997): 1059–65. http://dx.doi.org/10.4039/ent1291059-6.
Full textAbstract:
AbstractLaboratory assays and field surveys showed that Ascosphaera larvis (Bissett) is a pathogen of alfalfa leafcutting bee larvae, capable of causing high mortality in commercial populations. In one population, over 21% of bees were found to be infected by A. larvis. However, overall levels of the disease are low and it is unlikely that this pathogen poses an immediate threat to commercial leafcutting bee populations in Canada. The LD50 was determined to be 1.9 × 105 spores/bee. Elevated levels of CO2 are required for in vitro spore germination. The disease can easily be diagnosed within bee cells by X-ray radiography, thereby enabling disease levels to be monitored using conventional methods utilized by the industry to monitor leafcutting bee quality.
6
Vandermeer, G., Y. Chamy, and P. J. Pisella. "Comparaison de la qualité de vision objective mesurée par aberrométrie double passage chez des patients atteints de syndrome sec modéré : larmes artificielles versus sérum physiologique : une étude pilote." Journal Français d'Ophtalmologie 41, no. 3 (March 2018): 238–45. http://dx.doi.org/10.1016/j.jfo.2017.05.025.
Full text
7
Schat, Marjolein, Sharlene E. Sing, and Robert K. D. Peterson. "Erratum: External rostral characters for differentiation of sexes in the biological control agent Mecinus janthinus (Coleoptera: Curculionidae)." Canadian Entomologist 139, no. 5 (October 2007): 756. http://dx.doi.org/10.4039/n07-900.
Full textAbstract:
RésuméLe charançon perceur de tiges, Mecinus janthinus (Germar), est un agent de lutte biologique classique bien établi et prometteur pour le contrôle d'une mauvaise herbe exotique invasive, la linaire à feuilles larges (Linaria dalmatica (L.) Mill.) (Scrophulariaceae). Dans cet article, nous présentons des caractéristiques du rostre faciles à identifier, permettant la différenciation, à faible grossissement, des sexes de charançons perceurs de tiges vivants. Ces caractéristiques peuvent être utilisées par des travailleurs possédant une formation minimale afin d'identifier correctement le sexe des charançons. Ceci permettra donc une détermination rapide de la proportion des sexes des populations sur le terrain, améliorant ainsi les délais de capture, puis de lâchers.
8
Oliveira, Maurílio F. de, Lino R. Ferreira, Tocio Sediyama, and Jorge G. Magalhães. "Efeito do eptc + r 25788 em combinação com o diuron no controle de plantas daninhas e seletividade para a cultura da batata-doce." Planta Daninha 15, no. 2 (1997): 198–205. http://dx.doi.org/10.1590/s0100-83581997000200013.
Full textAbstract:
Com o objetivo de avaliar o efeito das doses de EPTC + R 25788 combinadas com doses de diuron no controle de plantas daninhas na cultura de batata-doce, realizou-se um ensaio sob condições de campo num Podzólico Vermelho Amarelo, fase terraço, argiloso, com 3,5 % de matéria orgânica. Foram avaliadas quatro doses de EP TC + R 25 78 8 aplicado em pré-plantio incorporado: 0,0; 1,6; 3,2 e 4,8 kg/ha por quatro doses dediuron : 0,0 ; 0,8 ; 1,2 e 1,6 kg/ha, em quatro repetições. O EPTC + R25788 apresentou bom controle das plantas de tiririca quando aplicado nas maiores doses, principalmente na ausência do diuron. As maiores doses de EPTC + R 25788 aplicadas isoladamente, apresentaram significativos aumentos na população de plantas de folhas largas. As maiores doses de diuron promoveram melhor controle das plantas de folhas largas, na presença das maiores doses de EPTC + R 25788. A combinação das maiores doses dos herbicidas não refletiram em maiores produções. A maior produção de batata-doce ocorreu quando se aplicou 6 L/ha de Eradicane e 1,32 kg/ha de Karmex 800.
9
Pelletier, Yvan, and Gilles Bélanger. "EFFET DU RAYONNEMENT LUMINEUX ET DE LA VITESSE DE L’AIR AMBIANT SUR LA TEMPÉRATURE CORPORELLE DES LARVES ET DES ADULTES DU DORYPHORE DE LA POMME DE TERRE." Canadian Entomologist 129, no. 5 (October 1997): 801–8. http://dx.doi.org/10.4039/ent129801-5.
Full textAbstract:
AbstractThe effect of light intensity and wind speed on the body temperature of larvae and adults of the Colorado potato beetle (Leptinotarsa decemlineata (Say)) was studied in the laboratory. At a light intensity of 0.95 kW m−2 and without wind, the body temperature of larvae and adults was respectively 9.3 and 18.2 °C higher than air temperature. The temperature difference between the body temperature of larvae and adults and the air temperature increased linearly with an increase in light intensity. Wind speed had an important effect on the rate of increase of the body temperature as a function of light intensity in both larvae and adults. Our results demonstrated that the energy balance of larvae and adults differs.
10
Moret, Pierre, and Yves Bousquet. "LE SOUS-GENRE DERCYLUS (LICINODERCYLUS) KUNTZEN, 1912: POSITION SYSTÉMATIQUE, RÉVISION DES ESPÈCES ET DESCRIPTION DE LA LARVE (CARABIDAE, DERCYLINI)." Canadian Entomologist 127, no. 5 (October 1995): 753–98. http://dx.doi.org/10.4039/ent127753-5.
Full textAbstract:
RésuméUne nouvelle définition des sous-genres de Dercylus Castelnau, 1832, est proposée, et leur synonymie est clarifiée. Quatre sous-genres sont retenus : Dercylus s.str., Eurydercylus, subgen.nov. (espèce-type : Dercylus tenebricosus La Ferté-Sénectère, 1851), Asporina Castelnau, 1835, et Licinodercylus Kuntzen, 1912. Dercylodes Chaudoir, 1883, et Pterodercylus Kuntzen, 1912, sont considérés comme des synonymes de Dercylus s.str. Le nom Licinodercylus Kuntzen, 1912, remplace Physomerus Chaudoir, 1883, homonyme plus récent de trois autres noms de genre. Les 14 espèces aujourd’hui connues du sous-genre Licinodercylus font ensuite l’objet d’une révision systématique. Onze d’entre elles sont des espèces nouvelles : Dercylus (Licinodercylus) franiai Moret, D. onorei Moret, D. orbiculatus Moret, D. praepilatus Moret, D. screator Moret, D. davidsoni Moret, D. granifer Moret, D. nodosus Moret, D. gaujoni Moret, D. gibber Moret et D. mathani Moret. La larve de Dercylus (Licinodercylus) orbiculatus sp.nov. est décrite, et les affinités phylogénétiques des Dercylini sont discutées. On présente enfin les informations disponibles concernant l’écologie et la répartition biogéographique des Licinodercylus de l’Ecuador, et des hypothèses sont proposées sur les modalités de leur spéciation.
11
Sugai, T., D. G. Kam, E. Agathokleous, M. Watanabe, K. Kita, and T. Koike. "Growth and photosynthetic response of two larches exposed to O3 mixing ratios ranging from preindustrial to near future." Photosynthetica 56, no. 3 (August 1, 2018): 901–10. http://dx.doi.org/10.1007/s11099-017-0747-7.
Full text
12
Voll, E., E. Torres, A. M. Brichenti, and D. L. P. Gazziero. "Dinâmica do banco de sementes de plantas daninhas sob diferentes sistemas de manejo de solo." Planta Daninha 19, no. 2 (August 2001): 171–78. http://dx.doi.org/10.1590/s0100-83582001000200003.
Full textAbstract:
Um experimento foi conduzido em campo no período de 1982 a 1998, em Londrina-PR, com o objetivo de avaliar o efeito de diferentes sistemas de manejo de solo nas reduções anuais de um banco de sementes de plantas daninhas e seus períodos de sobrevivência, sendo as plantas daninhas manejadas através de herbicidas, e a seqüência anual de cultivo soja após trigo. Os tratamentos de manejo de solos foram: 1) semeadura direta; 2) arado de discos e grade niveladora; 3) grade aradora e grade niveladora; 4) escarificação e grade niveladora. O delineamento experimental foi o de blocos ao acaso, com quatro repetições. A identificação e contagem das sementes presentes no solo foram feitas em 1990, 1995 e 1998. As estimativas de sobrevivência (a 1% da população inicial) das gramíneas capim-marmelada (Brachiaria plantaginea) e capim-colchão (Digitaria horizontalis ), nos quatro sistemas de manejo, foram de 5 a 10 anos e 5 a 7 anos, respectivamente; as das espécies de folhas largas, como caruru (Amaranthus spp.), de 5 a 9 anos, carrapicho-de-carneiro (Acanthospermum hispidum ), de 7 a 9 anos, de 10 a 20 anos, e picão-preto (Bidens pilosa), de 3 a 4 anos, e a comelinácea trapoeraba (Commelina benghalensis) de 10 a 20 anos. As sementes de espécies de plantas daninhas apresentaram características distintas de sobrevivência, em função do manejo do solo, do controle ao longo dos anos e das características morfológicas e fisiológicas das sementes.
13
Solomon, Aharon, and Itamar Glazer. "Desiccation survival of the entomopathogenic nematode Steinernema feltiae: induction of anhydrobiosis." Nematology 1, no. 1 (1999): 61–68. http://dx.doi.org/10.1163/156854199507983.
Full textAbstract:
Abstract The present study describes different desiccation tolerance traits of three strains of Steinernema feltiae (IS-6, IS-15, and N8). A slow dehydration regime (pre-conditioning at 97% relative humidity \[RH] for 3 days at 23 degrees C) induced a quiescent anhydrobiosis state in all strains, which enabled them to survive at lower humidities (75% and 85% RH). The IS-6 strain isolated from the Negev desert region of Israel exhibited the best desiccation tolerance. The second best tolerance was observed in the IS-15 strain isolated from Galilee, in the northern part of Israel. The poorest tolerance was exhibited by the N8 strain, which was obtained from Germany. The higher desiccation tolerance of the IS-6 and IS-15 strains was associated with a dispersal response of the aggregated infective juveniles (IJs) at the slow dehydration regime. This allowed the coiled IJs to enter into anhydrobiosis individually, whereas the IJs of the N8 strain remained clumped together. In the present study, the IS-6 strain was chosen to determine the optimal conditions for induction into, and recovery from, anhydrobiosis. A high correlation (r = 0.875, P < 0.05) was found between the survival of individual IJs at 85% RH and the initial numbers of IJs (ranging from 70 to 7700) in the pre-conditioned clump. The same recovery rates of pre-conditioned IJs exposed to 85% RH over a period of 12 days were obtained with either direct immersion in distilled water or immersion in distilled water after 24 h exposure to 100% RH. No significant differences in virulence and ability to penetrate Tenebrio molitor larvae were observed between non-desiccated IJs and rehydrated IJs that had been pre-conditioned and desiccated for 5 days at 85% RH. Survie en etat de deshydratation du nematode entomopathogene Steinernema feltiae: induction de l'anhydrobiose - La presente etude decrit differents aspects de la tolerance a la dessiccation chez trois souches de Steinernema feltiae (IS-6, IS-15 et N8). Une deshydratation lente- preconditionnement a une humidite relative (RH) de 97% pendant 3 jours a 23 degrees C - induit un stade de quiescence anhydrobiotique chez toutes les souches, ce qui les rend capables de survivre a des humidites faibles (RH 75% et 85%). La souche IS-6 isolee dans le desert du Negev (Israel) fait montre de la meilleure tolerance a la dessiccation. Vient ensuite la souche IS-15 isolee en Galilee (partie nord d'Israel). La plus faible tolerance est celle de la souche N8 provenant d'Allemagne. La tolerance plus elevee a la dessiccation des souches IS-6 et IS-15 est associee a une reaction de separation des juveniles infestants (IJ) dans les agregats lors de la deshydratation lente. Cette separation est suivie d'une entree en anhydrobiose des separes, enroules sur eux-memes, tandis que les IJ de la souche N8 restent agglomeres. La souche IS-6 a ete choisie pour determiner les conditions optimales induisant l'anhydrobiose et la sortie de ce stade physiologique. Une forte correlation (r = 0,875, P < 0,05) a ete observee entre la survie des IJ separes a une RH de 85% et la presence d'agregats (comptant 70 a 7700 IJ) au moment du preconditionnement initial. Les memes taux de reviviscence sont obtenus, soit par immersion directe dans l'eau distillee, soit par exposition a une RH de 100% avant immersion dans l'eau. Aucune difference significative dans la virulence et la capacite a penetrer les larves de Tenebrio molitor n'a ete observee entre les IJ dessechees, apres le preconditionnement pendant 5 jours a une RH de 85% et les IJ n'ayant pas subi ce traitement.
14
Pérez -Morales, A., A. Martínez -López, and J. M. Camalich -Carpizo. "DRY WEIGHT, CARBON, C/N RATIO, HYDROGEN, AND CHLOROPHYLL VARIATION DURING EXPONENTIAL GROWTH OF SELECTED MICROALGAE SPECIES USED IN AQUACULTURE." CICIMAR Oceánides 30, no. 1 (June 27, 2015): 33. http://dx.doi.org/10.37543/oceanides.v30i1.168.
Full textAbstract:
Microalgae are commonly used as food source in aquaculture, mainly for shellfish and larvae of crustacean and fish. All hatcheries need an excellent inoculum to produce high-quality microalgae when cultured outdoor in extensive systems, and this depends largely on the health of the microalgae cultured under laboratory conditions as a primary step. Therefore, the aim of this work was to assess variations of dry weight, carbon, C/N ratio, hydrogen and chlorophylls as physiological indicators of nutrients uptake and growth rate during exponential growth of Isochrysis galbana, Chaetoceros calcitrans and Dunaliella tertiolecta, using f/2 as culture medium. Chaetoceros calcitrans and D. tertiolecta had higher carbon content (~30 pg cell-1). The C/N ratio varied widely, gradually decreasing on I. galbana. Chlorophyll a varied among the three microalgae tested, ranging from 0.25 pg cell-1. Growth rate was higher in I. galbana (K’ 0.83) followed by D. tertiolecta and C. calcitrans. Results showed that nutrient incorporation by cell change when cell density increases; this information provides new insights in the physiology of marine microalgae and confirms that nutrient uptake dynamics is different in each microalga species. Finally, this study indicates that using one culture medium is not equally efficient for all microalgae used in aquaculture since each species has specific nutritional requirements. Variación de peso seco, carbono, relación C/N, hidrógeno y clorofilas durante el crecimiento exponencial de especies selectas de microalgas utilizadas en acuacultura Las microalgas son comúnmente utilizadas como fuente de alimento en acuacultura, principalmente para cultivo de moluscos y para las fases larvarias de crustáceos y peces. Los criaderos de larvas necesitan un excelente inóculo para producir microalgas de alta calidad cuando se cultivan al exterior en sistemas extensivos; esto depende principalmente de la salud de las microalgas cultivadas bajo condiciones de laboratorio como primer paso. Por lo tanto, el objetivo de este trabajo fue evaluar variaciones de peso seco, carbono, relación C/N, hidrógeno y clorofilas como indicadores fisiológicos de la asimilación de nutrientes y tasa de crecimiento durante el crecimiento exponencial de Isochrysis galbana, Chaetoceros calcitrans y Dunaliella tertiolecta, usando f/2 como medio de cultivo. Chaetoceros calcitrans y D. tertiolecta presentaron el mayor contenido de carbono (~30 pg cél-1). La relación C/N varió ampliamente, decreciendo gradualmente en I. galbana. La clorofila a fue la que más varió entre las tres microalgas evaluadas, en el intervalo de 0.25 pg cél-1. La tasa de crecimiento fue mayor en I. galbana (K’ 0.83) seguido por D. tertiolecta y C. calcitrans. Los resultados mostraron que la incorporación de nutrientes por célula cambia cuando la densidad celular se incrementa; esta información provee nuevo conocimiento sobre la fisiología de microalgas marinas y confirma que la dinámica de incorporación de nutrientes es diferente en cada especie de microalga. Por último, este estudio indicó que el uso de un solo medio de cultivo no es igualmente eficiente para todas las microalgas usadas en acuacultura, debido a que necesitan requerimientos nutricionales específicos.
15
Pérez -Morales, A., A. Martínez -López, and J. M. Camalich -Carpizo. "DRY WEIGHT, CARBON, C/N RATIO, HYDROGEN, AND CHLOROPHYLL VARIATION DURING EXPONENTIAL GROWTH OF SELECTED MICROALGAE SPECIES USED IN AQUACULTURE." CICIMAR Oceánides 30, no. 1 (June 27, 2015): 33. http://dx.doi.org/10.37543/oceanides.v30i1.168.
Full textAbstract:
Microalgae are commonly used as food source in aquaculture, mainly for shellfish and larvae of crustacean and fish. All hatcheries need an excellent inoculum to produce high-quality microalgae when cultured outdoor in extensive systems, and this depends largely on the health of the microalgae cultured under laboratory conditions as a primary step. Therefore, the aim of this work was to assess variations of dry weight, carbon, C/N ratio, hydrogen and chlorophylls as physiological indicators of nutrients uptake and growth rate during exponential growth of Isochrysis galbana, Chaetoceros calcitrans and Dunaliella tertiolecta, using f/2 as culture medium. Chaetoceros calcitrans and D. tertiolecta had higher carbon content (~30 pg cell-1). The C/N ratio varied widely, gradually decreasing on I. galbana. Chlorophyll a varied among the three microalgae tested, ranging from 0.25 pg cell-1. Growth rate was higher in I. galbana (K’ 0.83) followed by D. tertiolecta and C. calcitrans. Results showed that nutrient incorporation by cell change when cell density increases; this information provides new insights in the physiology of marine microalgae and confirms that nutrient uptake dynamics is different in each microalga species. Finally, this study indicates that using one culture medium is not equally efficient for all microalgae used in aquaculture since each species has specific nutritional requirements. Variación de peso seco, carbono, relación C/N, hidrógeno y clorofilas durante el crecimiento exponencial de especies selectas de microalgas utilizadas en acuacultura Las microalgas son comúnmente utilizadas como fuente de alimento en acuacultura, principalmente para cultivo de moluscos y para las fases larvarias de crustáceos y peces. Los criaderos de larvas necesitan un excelente inóculo para producir microalgas de alta calidad cuando se cultivan al exterior en sistemas extensivos; esto depende principalmente de la salud de las microalgas cultivadas bajo condiciones de laboratorio como primer paso. Por lo tanto, el objetivo de este trabajo fue evaluar variaciones de peso seco, carbono, relación C/N, hidrógeno y clorofilas como indicadores fisiológicos de la asimilación de nutrientes y tasa de crecimiento durante el crecimiento exponencial de Isochrysis galbana, Chaetoceros calcitrans y Dunaliella tertiolecta, usando f/2 como medio de cultivo. Chaetoceros calcitrans y D. tertiolecta presentaron el mayor contenido de carbono (~30 pg cél-1). La relación C/N varió ampliamente, decreciendo gradualmente en I. galbana. La clorofila a fue la que más varió entre las tres microalgas evaluadas, en el intervalo de 0.25 pg cél-1. La tasa de crecimiento fue mayor en I. galbana (K’ 0.83) seguido por D. tertiolecta y C. calcitrans. Los resultados mostraron que la incorporación de nutrientes por célula cambia cuando la densidad celular se incrementa; esta información provee nuevo conocimiento sobre la fisiología de microalgas marinas y confirma que la dinámica de incorporación de nutrientes es diferente en cada especie de microalga. Por último, este estudio indicó que el uso de un solo medio de cultivo no es igualmente eficiente para todas las microalgas usadas en acuacultura, debido a que necesitan requerimientos nutricionales específicos.
16
Freitas, Silvério P., Tocio Sediyama, Maria A. N. Sediyama, Francisco A. Ferreira, and Carlos S. Sediyama. "Efeitos de dejeto de suínos na incidência de plantas daninhas e na eficiência do herbicida metribuzin na cultura da batata-doce." Planta Daninha 16, no. 2 (December 1998): 85–96. http://dx.doi.org/10.1590/s0100-83581998000200002.
Full textAbstract:
O experimento foi realizado em condições de campo, na Fazenda Experimental da EPAMIG, em Ponte Nova-MG, no período de janeiro a julho de 1995, com o objetivo de avaliar o efeito de doses de dejeto de suínos na forma líquida, sobre a produção de batata-doce, cultivar Paulista, na incidência de plantas daninhas e na eficiência de controle de espécies de plantas daninhas pelo metribuzin. Utilizou-se o delineamento em blocos ao acaso, no esquema fatorial, com quatro repetições. Foram avaliados os efeitos das doses 0, 20, 40 e 60 m3 ha-1 de dejeto de suínos combinadas com 0, 300, 600 e 900 g ha-1 de metribuzin. Houve incremento linear de biomassa fresca das plantas daninhas de folhas largas, plantas de folhas estreitas e total de plantas daninhas em função do aumento das doses dejeto de suínos. O metribuzin foi seletivo para a cultura de batata-doce, não sendo observado nenhum sintoma visível de fitotoxicidade à cultura e eficiente no controle das principais plantas daninhas presentes na área. A produção máxima de raízes comerciais (22,94 t ha-1) foi obtida com o metribuzin na dose 810,17 g ha-1. Isto representou cerca de 89% superior ao peso obtido pela testemunha sem tratos culturais. Esta produtividade foi semelhante àquela observada nos tratamentos que receberam três cultivos. As plantas daninhas interferiram negativamente nas principais características avaliadas de produção da batata-doce. A cultura da batata-doce respondeu positivamente a adubação com dejeto líquido de suínos, com aumento linear da produção de raízes das classes extra A, comercial e total. Verificou-se também que houve correlação negativa entre plantas daninhas e as principais características de produção da cultura de batata-doce.
17
Fornarolli, Donizeti A., Benedito N. Rodrigues, Adel N. Chehata, and Maria A. Valério. "Influência do horário de aplicação no comportamento de atrazine e misturas aplicadas em pós-emergência na cultura do milho." Planta Daninha 17, no. 1 (April 1999): 119–30. http://dx.doi.org/10.1590/s0100-83581999000100011.
Full textAbstract:
O objetivo do presente trabalho foi verificar a influência do horário de aplicação de herbicidas no controle de plantas daninhas gramíneas e dicotiledôneas na cultura do milho. O experimento foi conduzido no ano de 1991/92, na área experimental da Milenia Agro Ciências S/A, em Londrina, PR. O delineamento experimental empregado foi em blocos ao acaso com 4 repetições, utilizando atrazine a 2.400 g/ha + surfactante e as misturas formuladas de alachlor + atrazine (1.820 + 1.820), atrazine + óleo vegetal (2.400 + 1.800) g/ha aplicados as 4, 6, 8, 10, 12, 14, 16, 18, 20 e 22 horas. A gramínea presente era a Brachiaria plantagineano estádio de 1 a 5 folhas, e as dicotiledôneas Amaranthus hybridus, Euphorbia heterophylla, Bidens pilosa, Emilia sonchifolia e Sida rhombifolia todas no estádio de 2 a 6 folhas. A aplicação foi realizada no dia 12 de outubro de 1991, estando o dia sem nuvens. Às 4:00 horas a UR era 68%; às 14:00 horas, 35% e as 22:00h, 65%. O solo estava seco e nas aplicações das 4:00 e 6:00 horas havia a presença de orvalho nas folhagens. Utilizou-se um pulverizador de precisão a CO2, bicos leque Teejet 110.03 e volume de calda 300 l/ha. Os resultados mostraram que houve influência do horário de aplicação nos resultados para os herbicidas alachlor + atrazine e atrazine + óleo vegetal no controle de B. plantaginea. Para os tratamentos alachlor + atrazine e atrazine + óleo vegetal, quando a umidade relativa do ar esteve acima de 65%, ou seja entre 4:00 e 8:00 horas e a partir das 20:00 horas, o controle foi superior a 90%. Quando a umidade relativa do ar baixou para 35%, no período das 10:00 às 18:00 horas, o controle para o alachlor + atrazine foi de 80% e o de atrazine + óleo vegetal próximo a 60%. O controle de gramíneas no tratamento atrazine + surfactante foi inferior a 40% em todos os horários de aplicação. Ainda para B. plantaginea, o alachlor + atrazine aos 95 DAA ( dias após aplicação) apresentou melhor controle em relação ao atrazine + óleo vegetal principalmente nos horários das 10:00 as 20:00 horas. Para as folhas largas, não houve influência dos horários e todos os tratamentos apresentaram 100% de eficiência. Todos os herbicidas foram seletivos à cultura sendo que as misturas formuladas apresentaram no máximo 10% de injúrias. O atrazine + óleo vegetal foi mais fitotóxico no período das 6:00 às 10:00 e o alachlor + atrazine no período das 10:00 as 14:00. Houve total relação entre o nível de controle, produção de biomassa seca das infestantes e a produção de grãos.
18
FOLDI, IMRE. "Archaeococcoid scale insects (Hemiptera: Coccoidea) from the tropical high mountains of the Andean Cordillera, South America." Zootaxa 2300, no. 1 (November 30, 2009): 1–38. http://dx.doi.org/10.11646/zootaxa.2300.1.1.
Full textAbstract:
The diversity of the archaeococcoid scale insect fauna in the Cordillera of the Andes, particularly the páramos, was studied in Colombia, Ecuador, Peru, and Venezuela. The páramos is an ecosystem in the tropical high mountains, where the temperature alternates between freezing at night and thawing during the day. Within this habitat, two new genera and several new species and new country records were discovered and are described and illustrated below. Thus, at 4200 m in the Cordillera de Mérida, Venezuela, a new monophlebid genus, Corandesia Foldi n. gen., is erected for C. kozári Foldi n. sp. (Monophlebidae) based on the adult female. The genus Paramoandesia Foldi n. gen. (Monophlebidae) is erected for P. colombiensis Foldi n. sp. from 4200 m in Colombia, based on the adult female and male and for P. ecuadorensis Foldi n. sp. from 4100 m in Ecuador, based on the adult females. These three new species were found on Espeletia spp. (Asteraceae) in the páramos and, although living in the typically harsh environmental conditions of this habitat, do not appear to have developed special protective structures, although they have probably developed physiological adaptations and appear to exploit the protection afforded by the microhabitat at the base of large, dense leaves of their host plant. In addition, at 2000 m near Mérida, another monophlebid, Crypticerya abrahami (Newstead) was collected, previously only known from Guyana, and redescribed here based on the adult female and first-instar nymph. The adult and preadult females of Mimosicerya williamsi Foldi n. sp. (Coelostomidiidae) from 2500 m in Venezuela are described and illustrated. In addition, Platycoelostoma rauppi Foldi n. sp. (Callipappidae), a hypogeal species found on the roots of alfalfa in the mountains around Cusco, Peru, is described based on the adult female. This is the first record of a member of the Callipapidae from South America, as Platycoelostoma Morrison was previously believed to be restricted to Australia and to New Zealand. A taxonomic key to genera based on the adult females of Coelostomidiidae in the Neotropics is provided and, also keys to the adult females of species of Mimosicerya Cockerell (Coelostomidiidae), Paramoandesia (Monophlebidae) and to Platycoelostoma (Callipappidae).Les Archaeococcoides de la Cordillère des Andes de Colombie, de l’Equateur, du Pérou et du Venezuela sont analysés. Dans les páramos étudiés, un écosystème de haute montagne où les températures nuit-jour alternent entre congélation et décongélation, deux nouveau genres et plusieurs espèces nouvelles ont été découverts. Ainsi, dans les páramos de la Cordillère de Mérida, Venezuela, 4200 m, Corandesia Foldi n. gen. est créé pour l’espèce C. kozári Foldi n. sp. fondée sur l’adulte femelle. (Monophlebidae). Paramoandesia Foldi n. gen. est créé pour les espèces P. colombiensis Foldi n. sp. de Colombie, 4200 m, description fondée sur les adultes femelle et mâle et P. ecuadorensis Foldi n. sp. de l’Equateur, 4100 m, (Monophlebidae). Les espèces des páramos furent toutes collectées sur Espeletia spp. (Asteraceae) et, bien que vivant dans des conditions d’environnement extrêmes, elles n’ont cependant pas de structure de protection, mais ont développé probablement une adaptation physiologique, exploitent de plus l’effet protecteur du microclimat offert par les bases des larges feuilles de leurs plantes-hôtes. A une altitude inférieure près de Mérida au Venezuela, vers 2000 m, Crypticerya abrahami (Newstead) autre Monophlebidae, a été collectée, alors qu’elle n’était connue que de Guyana est redécrite fondée sur l’adulte femelle et de la première stade larvaire. Adulte et préadulte femelle de Mimosicerya williamsi Foldi n. sp. (Coelostomididae) du Venezuela, 2500 m, sont décrites et illustrées. Au Pérou, Platycoelostoma rauppi Foldi n. sp. (Callipappidae), espèce hypogée trouvée sur les racines de Medicago sativa, sur les montagnes environnantes de Cusco, décrite fondée sur l’adulte femelle. Il s’agit de la première découverte d’un membre de la famille des Callipappidae en Amérique du Sud, le genre Platycoelostoma Morrison étant jusqu’à présent considéré comme restreint à l’Australie et à la Nouvelle-Zélande. Une clef taxonomique fondée sur les adultes femelles est proposée pour les genres néotropicaux de Coelostomidiidae, ainsi que pour les espèces des genres Mimosicerya Cockerell (Coelostomidiidae), Paramoandesia (Monophlebidae), et Platycoelostoma Morrison (Callipappidae).
19
Musci, R., G. Teodone, P. Pollice, A. I. Guaricci, and P. Barbier. "P1748 Left atrial diastolic and systolic functions modulate the response to the standardised Valsalva maneuver in normal subjects." European Heart Journal - Cardiovascular Imaging 21, Supplement_1 (January 1, 2020). http://dx.doi.org/10.1093/ehjci/jez319.1107.
Full textAbstract:
Abstract Background Although the Valsalva maneuver (VM) is being advocated by current guidelines to identify with echocardiography patients with increased left ventricular (LV) filling pressures using a decrease in mitral E/A velocity > 0.5 as cutoff, there are limited published data for both patients and the normal response to the maneuver in healthy subjects. Purpose To assess LV and left atrial (LA) physiology during a standardized VM (VMs) in normal subjects. Methods The VMs was performed in 50 healthy subjects (M:F 38:12; age 40 ± 12 y.; HR 70 ± 11 bpm; BSA 1.81 ± 11 m2), instructed to forcefully exhale for 20 seconds without an initial deep breath into a tube connected to a sphygmomanometer, maintaining a 25-35 mmHg pressure. The VM was repeated 2 times at 5 minute intervals to record sequentially in the apical 4-chamber view: 1. LV and LA volumes; 2. Transmitral flow velocities. LA diastolic reservoir function (LAres) was calculated as: (maximum – minimum volume) / minimum volume x 100. Results. During the VMs, in all subjects LV indexed end-diastolic (-14 ± 7 ml/m2, -31 ± 15 %) and end-systolic (-6 ± 4 ml/m2, -31 ± 18 %) volumes, and stroke volume index (-9 ± 5 ml/m2, -30 ± 15 %) decreased similarly with unchanged LV ejection fraction %, and LA maximum and minimum volume indices both decreased (respectively -8 ± 6 ml/m2, -3 ± 3 ml/m2;-32 ± 25 %) with high variability. Mitral peak E velocity also decreased (-22 ± 13 cm/s, -27 ± 14 %) in all subjects, whereas peak A velocity change varied, such that a "pseudo-abnormal" decrease of E/A > 0.5 was seen in 18 subjects (37 %). At baseline, this subgroup had lower heart rate (66 ± 11 vs 73 ± 10 bpm, p= .026), higher LAres (193 ± 67 vs 145 ± 47 %, p= .006), lower peak A velocity (50 ± 12 vs 58 ± 12 cm/s, p= .04) and higher E/A (1.8±.6 vs 1.4±.3, p= .004). During VMs, LV and LA volumes decreased similarly in all subjects, but increase in heart rate was higher (12 ± 8 vs 6 ± 5 bpm, p= .023), and peak A wave increased instead of decreasing (20 ± 20 % vs -8 ± 18 %, p< .001) in the subjects with "pseudo-abnormal" decrease of E/A. During VMs, decrease in E/A was mainly determined (regression analysis, r: .76, p= .029) by baseline LAres (B= -.71) and change in LAres during VMs (B= -.47), whereas an increase in peak A velocity (r: .46, p= .031) was mainly determined by degree of HR increase (B= .41) and baseline LV EF (B= .3). Conclusions During VMs, a "pseudo-abnormal" decrease of the E/A velocity ratio is present in almost 40 % of normal subjects, and is determined by the interplay of the baseline diastolic compliance and the increase in systolic function of the LA during VM. These results may influence the accuracy of the VMs in the detection of increased LV filling pressures in patients.
20
"ERRATUM." Canadian Entomologist 131, no. 2 (April 1999): 282. http://dx.doi.org/10.4039/ent131282-2.
Full textAbstract:
RésuméIl y a maintenant plus de 85 ans, la Légionnaire bertha s’est révélée un insecte très nuisible aux entreprises agricoles dans l’ouest canadien et, depuis ce temps, des invasions se produisent à intervalles réguliers. La première invasion a été enregistrée en 1944 en Saskatchewan dans la nouvelle culture, le colza. L’exploitation de plus en plus fréquente du colza comme plante potagère a donné lieu à une augmentation considérable des dommages économiques causés par la légionnaire et a suscité l’usage de plus en plus répandu d’insecticides dans une tentative de lutte contre cet insecte ravageur. La découverte d’une phéromone spécifique à l’espèce et la mise au point d’un système de détection des adultes à la fin des années ’70 et au début des années ’80 a donné lieu à la conception d’une méthode permettant aux producteurs de prévoir très tôt les risques de dommages aux récoltes. En même temps, des méthodes d’estimation des populations de larves ont été élaborées, mais ces méthodes ont besoin d’être raffinées de manière à les rendre aptes à fournir une indication plus juste des risques de ravage dans les cultures de colza. La lutte contre la Légionnaire bertha est pour le moment fondée en grande partie sur l’utilisation d’insecticides chimiques, d’où la nécessité de mettre au point des stratégies de lutte intégrée.[Traduit au bureau de la Rédaction]
21
Danek, Małgorzata, Monika Chuchro, and Tomasz Danek. "Extreme growth reaction of larch (Larix decidua Mill.) from the Polish Sudetes and Carpathians: spatial distribution and climate impact." Trees, September 21, 2020. http://dx.doi.org/10.1007/s00468-020-02029-z.
Full textAbstract:
Abstract Key message Extreme growth reaction analysis shows that larches in the Sudetes are more vulnerable to climate changes, but negative extreme responses will also be observed in the Carpathians in the near future. Abstract Pointer year analysis provides information on extreme tree-ring growth reactions, which can significantly improve the interpretation of tree growth response to climate. Similarities and differences in extreme growth responses of larch (Larix decidua Mill.) from the Carpathians and the Sudetes (Polish parts) were studied. To this purpose, a pointer year analysis was performed. Regions with similar extreme growth response patterns to climatic conditions were distinguished. The spatial variability of extreme growth anomalies and the distribution of the determined widespread pointer years and their possible climatic forcing were analyzed. A coincidence of the positive pointer years observed in the Sudetes and lower Carpathians with wet and cold summers (especially during the previous year) was observed. Most of the subregional negative pointer years in the Sudetes are related to droughts whereas in the Carpathians this relation was not observed. Comparison of the extreme growth reaction of larch in both mountain regions suggest that larches in the Sudetes are more vulnerable to climate changes as the negative pointer years observed in the Sudetes are usually associated with droughts that are likely to intensify in the future. Similarities in the drivers of extreme responses of larch in both regions and predicted changes in climatic conditions suggest that negative extreme responses will also be observed in the Carpathians in the near future. The highest parts of the Carpathians (the Tatra Mountains) should be treated separately as both positive and negative pointer years observed there are temperature related. The obtained results suggest that the growth of larch stands in both regions will be negatively affected by predicted climate changes.