177 research outputs found

    Pollen as a component of the diet of Doru luteipes (Scudder, 1876) (Dermaptera: Forficulidade).

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    The properties of maize pollen in the diet of Doru luteipes were determined by biological responses of the predator feeding on natural preys and artificial diet. The biological parameters of D. luteipes fed on Spodoptera frugiperda (Smith, 1797) eggs, maize pollen, Rhopalosiphum maidis (Fitch, 1856) + maize pollen and R. maidis were assessed. The effect of pollen on artificial diet on the biological variables of the predator nymphs and adults were also evaluated. Time span of nymphal development was greater for D. luteipes exclusively fed on earwigs, with the lowest rate of nymph survival. However, maize pollen plus earwigs in the diet provided the predator´s highest survival rate, whilst percentage of fertile females was double when fed on diets composed of S. frugiperda and R. maidis eggs. Development period decreased when D. luteipes nymphs consumed artificial diet plus pollen but there were high fecundity rates (number of laying/female and total egg/female) and a greater percentage of fertile females when they were fed on maize pollen

    Tabelas de esperança de vida e fertilidade de Myzus persicae sobre pimentão em laboratório e casa de vegetação.

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    Estudos de tabelas de vida de insetos-praga em diferentes temperaturas auxiliam na compreensão da dinâmica populacional desses organismos. Objetivou-se calcular tabelas de esperança de vida e de fertilidade de Myzus persicae criado em pimentão Capsicum annuum, em diferentes condições térmicas. O estudo foi realizado em câmaras climatizadas, nas temperaturas de 15, 20, 25 e 30 ºC, UR de 70±10% e fotofase de 12 horas, e em casa de vegetação em temperaturas oscilantes, com média de 24,9 ºC e UR de 68,1%. A longevidade máxima de adultos de M. persicae foi maior a 15 ºC (45 dias) e diminuiu a 20 ºC (39 dias), 25 ºC (27 dias), 30 ºC (24 dias) e, em casa de vegetação a 24,9 ºC foi de 29,5 dias. A esperança de vida (ex) no primeiro dia de observação foi de 43,76; 35,39; 21,44; 17,67 e 17,03 dias, para as ninfas mantidas a 15, 20, 25, 30 e 24,9 ºC respectivamente, tendo a partir daí uma queda acentuada até o fim das observações. Os parâmetros de tabelas de vida e de fertilidade evidenciaram que a temperatura de 25 ºC proporcionou a melhor condição térmica para o crescimento populacional de M. persicae, com maior capacidade de aumentar em número (rm = 0,31) e menor tempo necessário para a população duplicar (TD=2,22 dias). Em casa de vegetação a oscilação térmica afetou o crescimento populacional, proporcionando menor valor de rm (0,28) e maior TD (2,47 dias), comparados àqueles mantidos à temperatura constante equivalente

    Cure and discontinuation of treatment in a tuberculosis control state programme in Brazil: insights from dispensing data

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    Poster presented at the 45th ESCP Symposium on Clinical Pharmacy. 4-6 October 2016, Oslo, NorwayN/

    Olfactory response of Mahanarva spectabilis (Hemiptera: Cercopidae) to volatile organic compounds from forage grasses.

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    Several herbivorous insects utilize plant chemical cues to identify hosts for feeding. The role of smell in host plant detection by Mahanarva spectabilis (Distant) remains largely unknown. In this study, assays were applied to assess M. spectabilis olfactory responses to forage grasses (Pennisetum purpureum cvs. Roxo Botucatu and Pioneiro; Panicum maximum cvs. Makueni and Tanzânia; Hyparrhenia rufa cv. Jaraguá; Melinis minutifora; Cynodon dactylon cv. Tifton; Brachiaria brizantha cv. Marandú; and Brachiaria decumbens cv. Basilisk). Bioassays were performed using a Y-olfactometer to evaluate the behavior of adult M. spectabilis to forage damaged and undamaged by insects. M. spectabilis preferred volatiles of undamaged Basilisk and Pioneiro. Repellent behavior by M. spectabilis to cospecifcs was recorded for plant volatiles from damaged Marandú. The mixture of volatiles from undamaged forage grasses difered from that of forage grasses damaged by insects. Forage grasses showed a greater diversity of compounds after damage, including menthone, eucalyptol and camphor, which are compounds likely to cause loss of attractiveness or repellence. Our results demonstrate that M. spectabilis employs plant chemical cues in its choice of hosts. This fact may contribute to strategies of integrated management against this pest

    Avaliação de genótipos de Panicum no Estado do Rio de Janeiro.

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    bitstream/item/89792/1/BOP-19.pd

    Dinámica de la transferencia de inmunoglobulina G en el binomio madre-cría de llamas (Lama glama)

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    The transfer of immunity by colostrum in llama is a critical event in the survival of the newborn (teke). The objective of this work was to establish the kinetics of the concentration of immunoglobulin G (IgG) in tekes during the first 5 months of life and to relate the concentration of IgG in serum and colostrum of the llamas with the concentration in serum of the tekes. A cohort, observational and analytical study was designed. Twenty-five llamas and their respective offspring were studied. The concentration of IgG in colostrum and serum of the mothers was determined, and in tekes from birth to 150 days of life, using the simple radial immunodiffusion technique. The results showed an average concentration of IgG in llama serum of 4311.47 mg/dl and in colostrum of 23254.9 mg/dl. In the tekes at 0 h, the concentration of IgG was not measurable, reaching maximum values between 18 and 24 h, (4094.06 and 4197.95 mg/dl respectively), not finding in this period differences with the concentration of the maternal serum IgG (p 0.694). From 24 hours to 120 days a decrease in IgG levels was observed (p<0.0001), registering an increase at 150 days (p 0.0001). It is concluded that the values of colostral IgG are independent of the serum concentration in llamas and tekes, there being no association between them (p<0.0001). Colostrum provides levels of IgG that achieve a serum concentration in the tekes similar to those of their mothers at 24 hs postpartum.En las llamas la transferencia de la inmunidad pasiva a través del calostro es un evento crítico para la supervivencia de la cría (teke). El objetivo de este trabajo fue establecer la cinética de la concentración de inmunoglobulina G (IgG) en tekes durante los primeros 5 meses de vida y relacionar la concentración de IgG en suero y calostro de las llamas con la concentración en suero de los tekes. Se diseñó un estudio de cohorte, observacional y analítico. Se estudiaron 25 llamas y sus respectivas crías. Se determinó la concentración de IgG en calostro y suero de las madres y en tekes según una cinética establecida desde el nacimiento hasta los 150 días de vida, empleando la técnica de inmunodifusión radial simple. Los resultados mostraron una concentración media de IgG en suero de llamas de 4311,47 mg/dl y en calostro de 23254,9 mg/dl. En los tekes -a las 0 h posparto- la concentración de IgG fue no dosable, alcanzando valores máximos entre las 18 y 24 h (4094,06 y 4197,95 mg/dl respectivamente) no encontrando en este periodo diferencias con la concentración de la IgG sérica materna (p 0,694). Desde las 24 h hasta los 120 días se observó un descenso en los niveles de IgG (p<0,0001), registrándose un incremento a los 150 días (p 0,0001). Se concluye que los valores de IgG calostral son independientes de la concentración sérica tanto en llamas como en tekes, no existiendo asociación entre los mismos (p<0,0001). El calostro aporta niveles de IgG que en los tekes logran concentraciones séricas similares a las de sus madres a las 24 h posparto
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