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| Registros recuperados: 23 | |
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| Lima,Marcileyne Pessôa Leite de; Oliveira,José Vargas de; Barros,Reginaldo; Torres,Jorge Braz. |
| Callosobruchus maculatus (Fabr.) is an important pest in stored cowpea, Vigna unguiculata (L.) Walp., with ample distribution in tropical and subtropical regions. The effect of alternation of cowpea genotypes, susceptible (S) and resistant (R), on the biology of (C. maculatus) was studied after four generations. A no-choice test was carried out in a completely randomized design, factorial scheme, with five treatments, four host combinations (RR, RS, SR and SS) and five replications. Each replication consisted of 30 grains of each genotype infested by two insect couples. The number of eggs per female was not different within or between combinations, evidencing that the genotypes and their alternation did not affect C. maculatus fecundity. Egg viability,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Plant resistance; Antibiosis; Stored cowpea pest. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100005 |
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| Mottaghinia,L; Razmjou,J; Nouri-Ganbalani,G; Rafiee-Dastjerdi,H. |
| The antibiotic and antixenotic resistance of six commonly produced potato cultivars in Iran including Aozonia, Agria, Cosima, Cosmos, Kondor and Savalan to the green peach aphid, Myzus persicae Sulzer, were investigated under laboratory conditions at 20 ± 2ºC, 65 ± 5% RH and 16:8h (L:D) in 2009. Antibiosis experiments showed significant differences in the developmental time, nymphal survivorship, fecundity, adult longevity of the green peach aphid among the potato cultivars. Intrinsic rate of natural increase (r m) for apterous aphids varied significantly with the potato cultivars on which the aphids were reared. This value ranged from 0.225 to 0.293 females/female/day, which was lowest on Cosmos and highest on Aozonia. Additionally, the estimated net... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant resistance; Aphid performance; Preference; Life table. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000300012 |
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| Silva,Gabriela Vieira; de Freitas Bueno,Adeney; Bortolotto,Orcial Ceolin; dos Santos,Antônio César; Pomari-Fernandes,Aline. |
| ABSTRACT This study aimed to evaluate the development and reproduction of the black armyworm, Spodoptera cosmioides when larvae fed on leaves of Bt-corn hybrids, expressing a single Cry1F and also Cry1F, Cry1A.105 and Cry2Ab2 in pyramided corn and their non-Bt-isoline (hybrid 2B688), as well as on leaves of two soybean isolines expressing the Cry1Ac protein and its non-Bt isoline (A5547-227). We also assessed the effect of these Bt and non-Bt plants on the leaf consumption rate of S. cosmioides larvae. This pest was unable to develop when fed on any of the corn isolines (Bt and non-Bt). When both 1st and 3rd instar larvae were fed on corn leaf, mortality was 100% in both Bt and non-Bt corn. In contrast, when corn leaves were offered to 5th instar larvae,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Black armyworm; Genetically modified organisms; Non-target pests; Plant resistance. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000300255 |
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| Feres,Reinaldo José Fazzio; Del'Arco,Marcelo; Daud,Rodrigo Damasco. |
| Life cycle of Tenuipalpus heveae Baker (Acari, Tenuipalpidae) on leaflets from three rubber tree clones. The biological cycle of Tenuipalpus heveae Baker, 1945 (Tenuipalpidae), a potential rubber tree pest mite, was studied by the observation of individuals reared on leaflets of the clones GT 1, PB 235 and RRIM 600, in controlled environmental conditions. Three daily observations were done of 60 eggs on leaflets from each clone in order to verify the development of immature stages and the female oviposition. The fertility life table was constructed based in the collected data. Mites reared on PB 235 had faster rate of development, requiring less time in days, to double its population in number (TD), and had the highest values for egg production, female... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertility life table; Hevea brasiliensis; Phytophagous mite; Plant resistance; Survivorship. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000200013 |
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| Castro,Maria de Jesus Passos de; Baldin,Edson Luiz Lopes; Cruz,Patrícia Leite; Souza,Camila Moreira de; Silva,Paulo Henrique Soares da. |
| The objective of this work was to characterize the resistance of 50 cowpea (Vigna unguiculata) genotypes to Callosobruchus maculatus. A completely randomized design with five replicates per treatment (genotype) was used. No-choice tests were performed using the 50 cowpea genotypes to evaluate the preference for oviposition and the development of the weevil. The genotypes IT85 F-2687, MN05-841 B-49, MNC99-508-1, MNC99-510-8, TVu 1593, Canapuzinho-1-2, and Sanzi Sambili show non-preference-type resistance (oviposition and feeding). IT81 D-1045 Ereto and IT81 D-1045 Enramador exhibit antibiosis against C. maculatus and descend from resistant genitors, which grants them potential to be used in future crossings to obtain cowpea varieties with higher levels of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; Bruchinae; Chrysomelidae; Plant resistance; Storage. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000900003 |
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| Silva,Leandro Carvalho da; Nere,Daniel Rodrigues; Bleicher,Ervino; Barbosa,Antônio Vinícius Correa; Tavares,Eraldo José Madureira. |
| Abstract: The objective of this work was to evaluate the resistance of advanced semi-erect cowpea (Vigna unguiculata) lines, by means of a screening assay for resistance and the elaboration of fertility-life tables of Aphis craccivora (Hemiptera: Aphididae). The experiments were carried out in a screenhouse. For the resistance trial, 15 advanced cowpea lines were used, as well as two standard genotypes for resistance and two for susceptibility, which were arranged in six blocks. After resistance was determined, two lines with the highest and lowest resistance were selected for the development of the fertility-life tables which were used to estimate demographic parameters. The MNCO4-762F-03 and MNCO4-762F-09 cowpea lines were classified as resistant, for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphis craccivora; Vigna unguiculata; Fecundity; Plant health; Plant resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000800900 |
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| Souza,Reginaldo Teodoro de; Naves,Rosemeire de Lellis; Conceição,Marco Antônio Fonseca; Costa,Sabrina Marcolino da; Savini,Taynara Cruz. |
| Abstract Different application frequencies of metalaxyl + mancozeb were evaluated to control downy mildew in vine plants ‘BRS Vitória’ in two experiments conducted in Jales, São Paulo, one in the production cycle and another in branches formation cycle. In experimental design of randomized blocks, five treatments were compared (1- two weekly applications; 2- one weekly application; 3- one application every 14 days; 4- one application every 21 days; 5- applications after sporulation) with four replications, each plot with three plants. According to the analysis of the area under the disease progress curve (AUDPC), in both experiments, there were statistically significant differences between the disease control levels provided by the different treatments (P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plasmopara viticola; Chemical control; Plant resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000300401 |
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| Silva,Deise Maria P. da; Oliveira,José V. de; Tabosa,José Nildo; Barros,Reginaldo; Santos,Elton O. dos; Azevedo,Simone S.. |
| Com o objetivo de identificar fontes de resistência à Spodoptera frugiperda (J. E. Smith, 1797), foram avaliadas as cultivares de milho CMS-22, CMS-35, AG-106, Dina-70, AG-510 e CMS-36 em campo, utilizando-se o delineamento experimental de blocos ao acaso com quatro repetições. Utilizaram-se as variáveis: danos foliares, obtidos através da escala visual de notas, sobrevivência, peso e comprimento das lagartas, 10 dias após a infestação artificial das plantas com lagartas de 1º ínstar. As cultivares diferiram significativamente (P=0,05) apenas com relação aos danos, destacando-se AG-510 como a mais resistente, com dano médio de 5,41 em comparação com CMS-35 e AG-106, as mais suscetíveis, com danos médios de 8,38 e 7,85 respectivamente. Foram determinadas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Fall armyworm; Plant resistance; Foliar damage; Larvae survival. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300015 |
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| Cortez,Mirko G. R.; Waquil,José M.. |
| An experiment was conducted in the greenhouse to evaluate the effect of sorghum (Sorghum bicolor) cultivars and Spodoptera frugiperda (J. E. Smith) infestations, at different plant developmental stages, on sorghum yield. Second instar larvae of S. frugiperda were used to infest plants. Significant differences (P ≤ 0,05) were found for the factors cultivar and stage of infestation for panicle (size and weight), grain (volume and weight) and 100 grain weight. No significant differences were observed for grain yield between damaged plant and the checks for the cvs. AG 3001 and CMSXS 375. However, the yield loss for the cv. BR 300 ranged from 11,6 to 21,7% for plants infested at 1st (15 days) and 4th stage (15 and 37 days), respectively. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Fall armyworm; Pest management; Sorghum bicolor; Plant resistance; Pest damage. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000200028 |
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| Wille,Paulo Eduardo; Pereira,Bruna Angelina; Wille,Cleiton Luiz; Restelatto,Samanta Souza; Boff,Mari Inês Carissimi; Franco,Cláudio Roberto. |
| Abstract: The objective of this work was to evaluate the natural resistance of soybean cultivars to Chrysodeixis includens. For this, four commercial soybean cultivars recommended for the Southern region of Brazil were used: BR 36, NA 5909 RG, BMX Turbo RR, and Benso 1RR. In the laboratory, larvae were subjected to the antixenosis feeding assay, in which they were free or not to choose among old leaves, new leaves, and pods. Neonate larvae were subjected to two antibiosis tests: in the first one, they were fed with leaves from the middle third of the plants of the four cultivars; and, in the second one, with leaves or pods of the NA 5909 RG cultivar. Chrysodeixis includens larvae prefer leaves over pods and old leaves over new ones. The Benso 1RR cultivar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Integrated pest management; IPM; Lepidopteran pests; Plant resistance; Plusiinae.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000100018 |
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| Silva,Gabriela Vieira; Pasini,Amarildo; Bueno,Adeney de Freitas; Bortolotto,Orcial Ceolin; Barbosa,Gustavo Caselato; Cruz,Ynaiara Kristhine Stopa. |
| No impact of Bt soybean that express Cry1Ac protein on biological traits of Euschistus heros (Hemiptera, Pentatomidae) and its egg parasitoid Telenomus podisi (Hymenoptera, Platygastridae). Biological traits of the stink bug Euschistus heros and its main biological control agent Telenomus podisi were evaluated under controlled environmental conditions (25 ± 2ºC; 60 ± 10% RH; and 14/10 h photoperiod) by placing first instar nymphs into Petri dishes with pods originating from two soybean isolines (Bt-soybean MON 87701 × MON 89788, which expresses the Cry1Ac protein, and its near non-Bt isoline A5547) where they remained until the adult stage. Due to gregarious behavior exhibited by first instar nymphs, they were individualized only when at the second instar.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg parasitoid; Genetically modified organisms (GMO); Natural enemy; Non-target pests; Plant resistance. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300010 |
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| Toscano,Luciana Cláudia; Boiça Jr.,Arlindo Leal; Maruyama,Wilson Itamar. |
| The silverleaf whitefly is one of most important pests of tomato (Lycopersicon spp.). The use of host plant resistance to control this insect is an interesting, potentially useful technique, but in demand of more research. The objectives of this work were to evaluate the oviposition non-preference of Bemisia tabaci (Gennadius, 1889) biotype B for different tomato plant genotypes, evaluating the correlation between oviposition preference and pubescence in the genotypes, and analyzing the abaxial and adaxial surfaces of Lycopersicon pennellii leaflets under the scanning electron microscope. Four wild tomato genotypes, LA 716 (L. pennellii); PI 127826 and PI 127827 (L. hirsutum); PI 134417 (L. hirsutum f. glabratum), and two commercial genotypes, Santa Clara... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon spp.; Insecta; Bemisia tabaci biotype B; Plant resistance; Trichome. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400009 |
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| Piubelli,Giorla C.; Hoffmann-Campo,Clara B.; Arruda,Iara C. de; Lara,Fernando M.. |
| The effects of five soybean [Glycine max (L.) Merrill] genotypes ('BR-16', 'IAC-100', PI 227687, PI 229358, PI 274454) on nymphal development, adult weight and lipid content of the stink bug Nezara viridula (L.), were evaluated in the laboratory. When fed on the pods of PI 227687 (resistant) and of 'BR-16' (susceptible) nymph mortalities were respectively 66.2% and 27.5%. Second instar nymphs, maintained since hatching in petri dishes containing PI 274454 and 'BR-16' pods, weighed 1.1 mg and 1.0 mg, respectively; they were heavier than those fed with PI 227687 (0.7 mg) and 'IAC-100' (0.7 mg) pods. Adult fresh weights were 146.9 mg when fed on 'BR-16', 127.0 mg with PI 227687 and 125.5 mg with 'IAC-100'. The later two genotypes also negatively affected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant resistance; Antibiosis; Glycine max. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100019 |
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| Registros recuperados: 23 | |
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