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Search Results: 1 - 10 of 32895 matches for " SANTA-CECíLIA LENIRA VIANA COSTA "
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Aspectos da biologia de Trichogramma demoraesi Nagaraja, 1983 e contribui??es ao manejo de cria??es massais deste parasitóide em ovos de Anagasta kuehniella (Zeller, 1879)
Santa-Cecília, Lenira Viana Costa;Matioli, José Claret;Sousa, Brígida de;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1987, DOI: 10.1590/S0071-12761987000200034
Abstract: results of laboratory trials showed a negative effect of the age of adults of trichogramma demoraesi on the parasitism of eggs of anagasta kuehniella and on the lenght of the immature stage of the parasitoid. these parameters were constant for insects 2 to 6-day-old and decreased significantly after the sixth day. the highest parasitism rates and immature stage lenght, for insects fed or not with a 50% honey solution, were obtained with 4 to 6-day-old adults and the parasitism did not occur with 10-day-old adults. males of a. kuehniella kept together with females in the cages increased the fecundity of the moths by 938.75% when they were kept without food and by 393-95% when they were fed with honey diet. the females longevity did not vary in function of the diet and it was slightly less in the females than in the males. when eggs of a. kuehniella containning the parasitoid in the pupal stage were stored at 5°c, there was no effect on the emergence of the parasitoid until 7 days of storing, with a small though continuous reduction on the emergence after this period of storing.
Desenvolvimento de Dysmicoccus brevipes (Cockerell) (Hemiptera:Pseudococcidae) em duas cultivares de abacaxi
Santa-Cecília, Lenira Viana Costa;Bueno, Vanda Helena Paes;Prado, Ernesto;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000500007
Abstract: the pineapple mealybug dysmicoccus brevipes (cockerell) (hemiptera: pseudococcidae) is the main pest on pineapple crops and biological studies of this insect are necessary on different cultivars. the objective of this work was to evaluate the development time of this mealybug on the pineapple cultivars pérola and cayenne. the experiment was performed in climated chambers at 25 ± 1oc, 70 ± 10% rh and 12 h photophase. pinneapple plants were reproduced in vitro, transplanted to pots (250 ml) and kept in greenhouse. one-day-old nymphs were kept inside a clipcage (1 cm diameter) fixed on the plants. no differences in development of d. brevipes among the cultivars were found. development times of females and males, respectively, were 39.9 and 32 days on cv. pérola and 38.5 and 32.4 days on cv. cayenne. nymphs survivals were 32.3 and 40.5%, sexual rates were 0.39 and 0.33, and females longevities were 20.3 and 26.1 days on cv. pérola and cayenne, respectively.
Aspectos biológicos e capacidade predatória de Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae) alimentada com Aphis gossypii Glover, 1877 (Hemiptera: Aphididae) em diferentes temperaturas
Alcantra, Eliana;Carvalho, César Freire;Santos, Terezinha Monteiro dos;Souza, Brígida;Santa-Cecília, Lenira Viana Costa;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000400003
Abstract: some biological aspects and the predatory capacity at three temperatures of larvae of ceraeochrysa cubana (hagen) fed third and fourth instar nymphs of aphis gossypii glover were evaluated. the experiments were conducted in climatic chambers at 22; 25 and 28±1oc, 70±10% of rh and 12-hour photophase. the experimental design was completely randomized with three treatments (temperatures) and 40 replicates. a reduction in the median life time of the larvae in the three instars of the stages of pre-pupa and pupa was found as related with the increase of temperature. the highest survivals were obtained at 22oc. for larvae of first instar, there were no significant differences in the daily average consumption of aphids at the three temperatures. for second and third instar larvae, there was higher consumption of aphids at the highest temperature. the total average number of aphids consumed by first and second instar larvae did not differ as related with the increase of temperature. for third instar larvae, the greatest total consumption was observed at 22oc, and the lowest consumption at 25oc. the lowest temperature enabled the highest total average consumption of the larval stage.
Aspectos biológicos de Chrysoperla externa (Hagen, 1861)(Neuroptera: Chrysopidae) alimentada com Planococcus citri (Risso, 1813)(Hemiptera: Pseudococcidae) e Toxoptera citricida (Kirkaldy, 1907) (Hemiptera: Aphididae)
Bonani, Jean Patrick;Souza, Brígida;Santa-Cecília, Lenira Viana Costa;Correa, Lilian Roberta Batista;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000100004
Abstract: the citrus-growing ecosystem houses a great deal of species of natural enemies, among them chrysoperla externa (hagen, 1861), which presents a great potential for use in the bipogical contrp of pests. the aim of this work was to evaluate the effects of the preys planococcus citri (risso, 1813) and toxoptera citricida (kirkaldy, 1907) on the development of larva and pupa of c. externa. the trial was carried out in an accpmatized room at 25±1oc, 70±10% rh and 12-hour photophase, the treatments consisting of the continuous and alternate supply of those two preys in each instar of the predator, in apition to eggs of anagasta kuehniella (zeller, 1879) utilized for comparison purposes. both the white mealybug and the aphids were given in sufficient amounts to the c. externa larvae to be able to feed ad libitum. the pfetime and the survival rate of the phases of larva, pupa and the larval-adult period of c. externa were evaluated. it was found that t. citricida given either singly along the larval development or in two consecutive instars of the predator was not an adequate prey, 100% of mortapty over the larval-adult period being found. when the larvae fed on p. citri, given in two instars of the predator, the survival rate in the larval-adult period was similar to the diet constituted of only a. kuehniella eggs, except when fed with t. citricida in the first instar.
Aspectos biológicos da fase adulta de Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) oriunda de larvas alimentadas com Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae)
Bezerra, Gerane Celly Dias;Santa-Cecília, Lenira Viana Costa;Carvalho, César Freire;Souza, Brígida;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000400002
Abstract: it was aimed to study some biological aspects in the adult stage of chrysoperla externa (hagen) when the larvae of predator were fed both nymphs and adult females of planococcus citri (risso). the experiment was conducted in climate chamber at 25 ± 1°c, 70 ± 10% of rh and 12-h photophase. the adults of c. externa whose larvae were fed nymphs at the three instars and adult females of mealybug were separated by sex and 25 couples were individualized in cages of pvc determining sex ratio, pre-oviposition period, daily and total oviposition for 40 days on end, longevity, embryonic period and survival rate of eggs. it was found that the nymphs at the three instars and adult females given as food did not affect sex ratio, pre-oviposition period, embryonic period and longevity of adults of c. externa. the daily and total egg production by c. externa was affected by the sort of food given to the predator during the larval stage, observing a greater production when the couples were fed at the larval stage with adults females of mealybug. by assessing egg production, a higher concentration of oviposition on the first ten days of the reproductive period was found, decreasing in the next evaluations. the survival rates of eggs not differ in function of feed in the different stages of development of prey that was consumed by differents predator larvae stage.
Consumo alimentar de Chrysoperla externa sobre as diferentes fases de desenvolvimento de Dysmicoccus brevipes, em laboratório
Gon?alves-Gervásio, Rita de Cássia Rodrigues;Santa-Cecília, Lenira Viana Costa;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000200024
Abstract: the food consumption and preference of larvae of chrysoperla externa hagen, 1861 (neuroptera: chrysopidae) larval were studied in laboratory under 25±2°c, 70±10% rh and 12 hours photophase, utilizing the pineapple mealybug (dysmicoccus brevipes cockerell, 1893, hemiptera: pseudococcidae) as a prey. the results showed that the predator's larval phases consumed on average of 70, 50 and 15,8 mealybugs of the first, second and third instar, respectively, and 10 adult females amounting to 145,8 individuals. it was noticed that 51% of the total number of mealybugs were consumed during the predator third instar. the high number of mealybugs consumed shows that c. externa presents a potential to be utilized in biological control of the mealybug d. brevipes.
Consumo alimentar de Chrysoperla externa sobre as diferentes fases de desenvolvimento de Dysmicoccus brevipes, em laboratório
Gon?alves-Gervásio Rita de Cássia Rodrigues,Santa-Cecília Lenira Viana Costa
Pesquisa Agropecuária Brasileira , 2001,
Abstract: Estudou-se o consumo e preferência alimentar de larvas de Chrysoperla externa Hagen, 1861 (Neuroptera: Chrysopidae) em laboratório à temperatura de 25±2°C, 70±10% UR e 12 horas de fotofase, utilizando como presa a cochonilha-do-abacaxi (Dysmicoccus brevipes Cockerell, 1893, Hemiptera: Pseudococcidae). Durante a fase larval do predador foram consumidas, em média, 70, 50 e 15,8 cochonilhas do primeiro, segundo e terceiro ínstar, respectivamente, e 10 fêmeas adultas, num total de 145,8 indivíduos. Do número total de cochonilhas, 51% foram consumidos durante o terceiro ínstar do predador. O alto número de cochonilhas consumido demonstra que a C. externa apresenta potencial para ser utilizada no controle biológico da cochonilha D. brevipes.
Desenvolvimento de Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) em cafeeiros = Development of Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) in coffee trees
Lenira Viana Costa Santa-Cecília,Lílian Roberta Barbosa Correa,Brígida Souza,Ernesto Prado
Acta Scientiarum : Agronomy , 2009,
Abstract: A cochonilha Planococcus citri (Risso, 1813) suga a seiva dos bot es florais e frutos do cafeeiro, atacando as rosetas desde a flora o até a colheita. Embora seja relatada há alguns anos na cafeicultura, s o escassas as informa es sobre o desenvolvimento dessacochonilha em cafeeiros. Assim, o presente trabalho teve por objetivos avaliar alguns aspectos biológicos da fase ninfal de P. citri em plantas de café. Ovos dessa cochonilha foram retirados de uma cria o em laboratório, isolados em placas de Petri contendo discos foliares de Coffea arabica L., das cultivares Acaiá Cerrado, Mundo Novo e Catuaí Vermelho e de C. canephora Pierre & Froenher, cultivar Apoat . As placas foram mantidas em camara climatizada a 25 ± 1°C, 70 ± 10% de umidade relativa e 12h de fotofase. Constatou-se que a cultivar Catuaí Vermelho foi a que proporcionou maior dura o do período ninfal das fêmeas, porém, n o foram constatadas diferen as na mortalidade. Essa cochonilha se desenvolveu satisfatoriamente em todas as cultivares de café estudadas e os resultados n o mostraram diferen as claras de susceptibilidade. The citrus mealybug Planococcus citri (Risso, 1813) feeds mainly on flowers and fruits of coffee plants from blooming until harvest. Little is known about its development in coffee although its occurrence is already known for several years. This work aims to study the nymph development of this mealybug in coffee plants.Eggs were isolated from a stock culture kept in laboratory and placed inside Petri dishes containing leaf sections in agar. The tested cultivars were Acaia Cerrado, Mundo Novo, Catuai Vermelho (Coffea arabica) and Apoat (C. canephora). Insects were kept in a climatizedchamber at 25oC, 70 ± 10% humidity and 12-hour photophase. The longest development period in females was obtained in cultivar Catuai Vermelho. No differences in mortality were found among cultivars. Mealybugs developed in all cultivars and the results did not showclear differences in susceptibility.
Parasitismo de ovos de tuta absoluta por Trichogramma pretiosum em diferentes genótipos de tomateiro
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000600024
Abstract: the objective of this research was to evaluate the influence of 2-tridecanone (2-td) content on three tomato genotypes (tom-556, hi-1 and pi 134417) in the parasitism of eggs of tuta absoluta meyrick, 1917 by trichogramma pretiosum riley, 1879. two experiments were carried out to verify the parasitism in isolated and combined plants. the results in both experiments showed that the percent of parasitism of tom-556 was significantly higher than the hi-1 and pi 134417. a higher percent of parasitism was observed in all strains when the eggs were placed in isolated plants. it is supposed that the presence of genotypes with different concentration of 2-td in the same environment may have influenced the parasitic behavior of t. pretiosum.
Sele??o indireta para teor de 2-tridecanona em tomateiros segregantes e sua rela??o com a resistência à tra?a-do-tomateiro
Labory, Cláudia Regina Gontijo;Santa-Cecília, Lenira Viana Costa;Maluf, Wilson Roberto;Cardoso, Maria das Gra?as;Bearzotti, Eduardo;Souza, Jo?o Candido de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000500002
Abstract: this work had the objective to verify the relation between 2-tridecanone (2-td) in selected plants and resistance level to tomato pinworm (tutaabsoluta (meyrick, 1917) (lepidoptera: gelechiidae)) in advanced generations of lycopersicon spp. interspecific crosses. it was used a tomato population (f4rc2 generation) segregant for 2-td, a methyl ketone that controls the resistance of the tomato pinworm. materials were selected and evaluated for a non-preference mechanism of resistance. three genotypes with high level of the allelochemic 2-td (hi1, hi2, hi3), two with low level (lo1, lo2) and two check genotypes were used. after a controlled infestation, oviposition preference, type and percent of leaflet damage, and damage index caused by the tomato pinworm were evaluated. plants with high level of 2-td (hi1, hi3) had a low progression of leaflet damage by tuta absoluta. the lo1 genotype was much attacked by the tomato pinworm, while the lo2 genotype was accidentally attacked by acari of the tetranychus genus, probably causing a dispute between the two arthropods. it was concluded that 2-td high levels are associated to non-preference ovipositions and feeding resistance mechanisms to tomato pinworm.
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