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| Carneiro,Francisco E.; Torres,Rogelio R.; Strapazzon,Roger; Ramírez,Sabrina A.; Guerra Jr,José C.V.; Koling,Diego F.; Moretto,Geraldo. |
| Varroa destructor has been in Brazil for more than 30 years, but no mortality of honeybee colonies due to this mite has been recorded. Africanized bee infestation rates attained by varroa have been low, without causing measurable damage to Brazilian apiculture. The low reproductive ability of this parasite in Africanized bee worker brood cells has been considered an important factor for maintaining the host-parasite equilibrium. Nevertheless, the possible substitution of the haplotype of the mite Varroa destructor that has occurred recently in Brazil could affected the reproductive ability of the population of this parasite in Brazil. The reproductive ability of worker of the mite females was evaluated in over one thousand 17-18day-old Africanized worker... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproductive rate; Worker brood cell. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600018 |
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| Moretto,Geraldo; Arias,Maria C.. |
| The endemic range of the stingless bee Melipona quadrifasciata Lepeletier extends from the southern most state in Brazil, Rio Grande do Sul, up to the state of Paraíba, where it originally inhabited the Atlantic Rain Forest. Two subspecies have been morphologically recognized based on the tergal band pattern (yellow stripes across the abdomen), M. q. quadrifasciata and M. q. anthidioides. The objective of the present study was to characterize restriction site variation in the mitochondrial DNA of each subspecies. Four colonies of each subspecies were sampled. One individual per colony was used for DNA extraction and further analysis through amplification of nine fragments of the mitochondrial genome and digestion with 13 restriction enzymes (PCR+RFLP).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Restriction enzyme; Polymorphism; PCR+RLFP; MtDNA. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000300004 |
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| Mello Junior,Leônidas João de; Orth,Afonso Inácio; Moretto,Geraldo. |
| O presente trabalho verificou experimentalmente a ecologia da polinização da amoreira-preta (Rubus sp.). Objetivou-se confirmar a síndrome de polinização de Rubus sp., por meio de análise de seu sistema reprodutivo, quantificação da produção diária de néctar, levantamento da entomofauna que visita as flores da amoreira na área de estudo e análise do seu comportamento polinizador. Os experimentos foram realizados em uma área de cultivo de amoreira-preta, no mês de dezembro de 2005, município de Timbó (SC). Constatou-se que a maior taxa de frutificação (48,3 % ± 3,2) ocorreu via polinização livre, onde os insetos não foram excluídos. Foi verificada a ocorrência de autopolinização, porém com taxa inferior de frutificação (12,2% ± 4,9). A anemofilia não foi... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sistema reprodutivo; Amora-preta; Visitantes florais; Néctar. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000300038 |
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| Goetten,Luis Claudio; Moretto,Geraldo; Stürmer,Sidney Luiz. |
| Mycorrhizal fungus inoculum produced on-farm can be used during production of woody plant seedlings to reduce costs associated with purchase of commercial inoculant and fertilization. This study aimed to test the efficiency of a mycorrhizal inoculant produced on-farm to promote growth and nutrition of woody species in combination with different levels of phosphorus. Plants were submitted to different treatments of phosphorus (0, 40 and 80 mg P/dm3) and mycorrhizal inoculation (uninoculated, and inoculation with Rhizophagus clarus [Rc] or Claroideoglomus etunicatum [Ce]). Species included were Luehea divaricata, Centrolobium robustum, Schinus terebinthifolius, Garcinia gardneriana, Cedrella fissilis, and Lafoensia pacari. The inoculum was produced using the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofertilizers; Inoculation; Mycorrhizal efficiency; Nursery; Seedlings growth; Tropical species. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100009 |
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| Moretto,Geraldo; Mello Jr.,Leonidas João de. |
| Different levels of infestation with the mite Varroa jacobsoni have been observed in the various Apis mellifera races. In general, bees of European races are more susceptible to the mite than African honey bees and their hybrids. In Brazil honey bee colonies are not treated against the mite, though apparently both climate and bee race influence the mite infestation. Six mixed colonies were made with Italian and Africanized honey bees. The percentage infestation by this parasite was found to be significantly lower in adult Africanized (1.69 ± 0.44) than Italian bees (2.79 ± 0.65). This ratio was similar to that found in Mexico, even though the Africanized bees tested there had not been in contact with varroa, compared to more than 20 years of the... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000300006 |
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