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Search Results: 1 - 10 of 122 matches for " Pratissoli "
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Ocorrência de Necrobia rufipes (De Geer) (Coleoptera: Cleridae) atacando castanha de caju proveniente da índia
Pratissoli, Dirceu;
Anais da Sociedade Entomológica do Brasil , 1997, DOI: 10.1590/S0301-80591997000300023
Abstract: the occurrence of necrobia rufipes (coleoptera: cleridae) damaging cashew of chestnut, anacardium occidentale, from india, was registered in ceará state, brazil.
Sele??o de linhagens de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) para o controle das tra?as Tuta absoluta (Meyrick) e Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)
PRATISSOLI, DIRCEU;PARRA, JOSé R. P.;
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000200011
Abstract: the biological aspects and the parasitism of six strains of trichogramma pretiosum riley reared on eggs of tomato moths tuta absoluta (meyrick) and phthorimaea operculella (zeller) were studied in order to select those with best biological features and more aggressive to control such pests. life cycle, viability, sexual ratio and parasitism percentage were similar among the six strains studied regarding the parasitism of t. absoluta eggs. in p. operculella eggs, strains l1, l4 and l6 were more aggressive. based on the cluster analysis, strains l1, l2, l4 and l5 had similar behavior when reared on t. absoluta eggs. for p. operculella, similarities were observed among strains l1, l3, l4 and l6. considering the desirable biological characteristics, that is, higher parasitism, shorter life cycle, higher viability and predominance of females, strains l1 and l4 are more suitable for tomato moths.
Ocorrência de Trichogramma acacioi Brun, Moraes & Soares (Hym.: Trichogrammatidae) em ovos de Nipteria panacea Thierry-Mieg (Lep.: Geometridae), um geometrídeo desfolhador do abacateiro
Pratissoli, Dirceu;Fonazier, Maurício J.;
Anais da Sociedade Entomológica do Brasil , 1999, DOI: 10.1590/S0301-80591999000200021
Abstract: eggs of nipteria panacea were collected at avocado orchards in differents altitudes in espírito santo state, brazil. no parasitoids emerged from eggs collected at 750 m altitude fields. t. acaioi was obtained from eggs collected in fields both at 850 m and 950 m of altitude, in a rate of parasitism of 15.6 and 41.7% respectively.
Desempenho de Trichogramma pretiosum Riley e T. exiguum Pinto & Platner (Hymenoptera: Trichogrammatidae) submetidos a diferentes densidades de ovos de Plutella xylostella (Lepidoptera: Plutellidae)
Pereira, Fabricio Fagundes;Barros, Reginaldo;Pratissoli, Dirceu;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000600001
Abstract: the objective of this research was to evaluate the performance of trichogramma pretiosum riley and trichogramma exiguum pinto & planter on different densities of plutella xylostella eggs (l.). for both species, groups were made with one, two and four females of trichogramma, and each group was confined in glass tubes with 15, 30, 45 and 60 eggs of p. xylostella for 24 hours. cycle duration (adult egg) of t. pretiosum and t. exiguum was around nine days. the highest parasitism rate of t. pretiosum and t. exiguum were reached when it used 15 eggs four females-1 and 15 eggs two females-1, respectively. the viability of parasitism for t. pretiosum and t. exiguum was not affected by the combinations of parasitoids and eggs for both species. the sex ratio was one for t. pretiosum and it varied from 0.6 to 0.8 to t. exiguum. the number of emerged individuals per egg was one. the greatest deformation rate of descendants for both species were observed in tubes containing four female 15 eggs-1 with 33.9 for t. pretiosum and 17.5 for t. exiguum, respectively. the most indicated combination for t. pretiosum and t. exiguum, was one female for 15 eggs-1 and two famales 15 eggs-1, respectively.
Desenvolvimento e exigências térmicas de Trichogramma pretiosum Riley, criados em duas tra?as do tomateiro
PRATISSOLI, DIRCEU;PARRA, JOSé ROBERTO POSTALI;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000700001
Abstract: the biology of trichogramma pretiosum in eggs of phthorimaea operculella (zeller) and of tuta absoluta (meyrick) were studied under different temperatures (18, 20, 22, 25, 30, 32°c), 70±10% ru and photophase of 14 hours, with the aim of determining the thermal requirements and the number of generations during the year. there was an inverse correlation between the duration of the cycle and the increase of temperature in the thermal zone studied. nevertheless, the sexual ratio was not affected by the temperature when the host was t. absoluta. the viability of t. pretiosum, reared in p. operculella, was more affected than in t. absoluta. the thermal requirement, calculated by the hyperbole was higher for t. absoluta (131.3 degrees day) in relation to p. operculella (120.9 degrees day), and the thermal threshold was lesser respectively, 12.98°c and 13.53°c. for both species of leafminer, the longevity of parasitoid always obeyed the weibull's distribution. the increase of the potential was estimated for both species of leafminer, according to the number of annual generations.
Influência da idade dos ovos de Helicoverpa zea (Boddie) no parasitismo de Trichogramma pretiosum Riley
Pratissoli, Dirceu;Oliveira, Harley Nonato de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000500023
Abstract: among the agents of biological control, the parasitoids of the genus trichogramma represent one of the most important groups, as they are able to control many pests in agriculture. the objective of this work was to determine the best age of the helicoverpa zea (boddie) eggs so that the trichogramma pretiosum riley could have the best efficiency against this pest. one, two, three and four-days-old eggs were offered for the parasitism during 24 hours, at 25 ± 1oc, relative humidity 70 ± 10% and photofase of 14 hours. one-day-old eggs showed the highest rates of parasitism, viability, and number of descendants for each female. the highest efficiency with t. pretiosum will be reached in the field conditions, when observed a great density of h. zea eggs until two days of embryonic development.
Desenvolvimento e exigências térmicas de Trichogramma pretiosum Riley, criados em duas tra as do tomateiro
PRATISSOLI DIRCEU,PARRA JOSé ROBERTO POSTALI
Pesquisa Agropecuária Brasileira , 2000,
Abstract: Estudou-se a biologia de Trichogramma pretiosum em ovos de Phthorimaea operculella (Zeller) e Tuta absoluta (Meyrick) em diferentes temperaturas (18, 20, 22, 25, 30 e 32oC), 70±10% de umidade relativa e fotofase de 14 horas, com o objetivo de se determinarem as exigências térmicas, bem como o número de gera es durante o ano. Houve correla o inversa entre a dura o do ciclo e o aumento de temperatura na faixa térmica estudada. A raz o sexual, no entanto, n o foi afetada pela temperatura quando o hospedeiro foi T. absoluta. A viabilidade de T. pretiosum, criado em P. operculella foi mais afetada que em T. absoluta. A exigência térmica, calculada pelo método da hipérbole, foi maior no tocante a T. absoluta (131,3 graus dia) em rela o a P. operculella (120,9 graus dia), e o limiar térmico inferior, respectivamente, 12,98 e 13,53°C. No que tange a ambas as espécies de tra as, a longevidade do parasitóide sempre obedeceu à distribui o de Weibull. O potencial de aumento foi avaliado, em ambas as espécies de tra as, com base no número de gera es anuais.
Desempenho de Trichogramma pretiosum Riley e T. exiguum Pinto & Platner (Hymenoptera: Trichogrammatidae) submetidos a diferentes densidades de ovos de Plutella xylostella (Lepidoptera: Plutellidae)
Pereira Fabricio Fagundes,Barros Reginaldo,Pratissoli Dirceu
Ciência Rural , 2004,
Abstract: Este trabalho teve como objetivo avaliar o desempenho de Trichogramma pretiosum Riley e de Trichogramma exiguum Pinto & Platner submetidos a diferentes densidades de ovos de Plutella xylostella (L.). Para cada espécie, grupos compostos por uma, duas e quatro fêmeas do parasitóide, foram confinadas em tubos de vidro juntamente com 15, 30, 45 e 60 ovos de P. xylostella por 24h. A dura o do ciclo (ovo-adulto) foi uniforme e exatamente igual a nove dias, tanto para T. pretiosum como para T. exiguum. A porcentagem de parasitismo de T. pretiosum e T. exiguum mais elevada foi encontrada nas combina es de 15 ovos quatro fêmeas-1 e duas fêmeas 15 ovos-1, respectivamente. A viabilidade do parasitismo para T. pretiosum e T. exiguum n o foi afetada pelas combina es de parasitóides e ovos para ambas as espécies. A raz o sexual foi igual a um para T. pretiosum e variando de 0,6 a 0,8 para T. exiguum. O número de parasitóides emergidos por ovo, de modo geral, foi um. As maiores porcentagens de deforma o foram de 33,9 e 17,5% dos descendentes para T. pretiosum e T. exiguum, nos tubos contendo quatro fêmeas para 15 ovos, respectivamente. A combina o mais indicada para T. pretiosum e T. exiguum foi uma fêmea 25 ovos-1 e duas fêmeas 15 ovos-1, respectivamente.
Distribui??o de ovos de Plutella xylostella (L.) (Lepidoptera: Plutellidae) e o parasitismo por Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae)
Zago, Hugo B;Barros, Reginaldo;Torres, Jorge B;Pratissoli, Dirceu;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000200015
Abstract: oviposition site preference of plutella xylostella (l.) and the parasitism by trichogramma pretiosum riley on cabbage plants at pre- and post-head formation were investigated in commercial cabbage field. groups of six plants were randomly caged. in each cage three pairs of 24h-old p. xylostella moths were released, followed by 1,200 t. pretiosum females released 12h later. after 48h from parasitoid release, plants were harvested and fully inspected with the oviposition mapped according to the leaf position and their parts (basal, median and border) and upper and bellow leaf surfaces. moth oviposition and egg parasitism were equally distributed across the plant leaves at the pre-head formation stage. at this stage, the basal part and the upper leaf surface were the preferred places for oviposition and egg parasitism, respectively. cabbage plants at the post-head formation stage exhibited greater oviposition and egg parasitism in the inner leaf attached to the head. at this stage, the leaf border and the upper leaf surface were the preferred places for oviposition and egg parasitism, respectively. the infestation of p. xylostella on cabbage can be determined by egg counting at the pre- and post-head formation stages at the basal part of the leaves or at the border of the leaf attached to the head, respectively. and, in both plant stages parasitized eggs by t. pretiosum are more likely to be found at the upper leaf surface.
Capacidade de parasitismo de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) em ovos de Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae) sob diferentes temperaturas
Pastori, Patrik L.;Monteiro, Lino B.;Botton, Marcos;Pratissoli, Dirceu;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000600015
Abstract: the parasitism capacity of trichogramma pretiosum riley strain bonagota on bonagota salubricola (meyrick) eggs was studied under the temperatures of 18, 20, 22, 25, 28, 30 and 32oc. the number of days with parasitism, accumulated parasitism, total number of eggs parasitized per female and parasitoid longevity was evaluated. in the first 24h, parasitism ranged from 1.6 (32oc) to 8.8 (22oc) eggs of b. salubricola. accumulated egg parasitism of b. salubricola reached 80% in 1st to 4th day at 20oc to 32oc, respectively, and in the 7th day at 18°c. temperatures from 18°c to 22°c were the best suited for the total eggs parasitized for female, resulting in 35.4 and 24.6 eggs/male respectively. t. pretiosum female longevity ranged from 7.8 to 2.5 days, at 18°c and 32oc, respectively. the results showed that t. pretiosum strain bonagota is better adapted to temperatures from 18°c to 22oc.
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