Fitopatologia Brasileira最新文献_第2页

Occurrence of Pseudomonas corrugata causing pith necrosis on tomato plants in Goiás, Brazil 巴西Goiás番茄植株发生引起髓坏死的瓦楞假单胞菌

Fitopatologia Brasileira Pub Date : 2007-12-01 DOI: 10.1590/S0100-41582007000600014

Alice Maria Quezado-Duval, C. M. Guimarães, O. M. Martins

引用次数: 8

Evaluation of phenotypic stability of resistance to Phytophthora spp. in cacao clones 可可无性系抗疫霉菌表型稳定性评价

Fitopatologia Brasileira Pub Date : 2007-12-01 DOI: 10.1590/S0100-41582007000600001

L. R. Pinto, S. D. V. M. Silva, M. M. Yamada

引用次数: 4

Estudos histopatológicos de Colletotrichum spp. em plântulas de cafeeiro 炭疽菌在咖啡幼苗中的组织病理学研究

Fitopatologia Brasileira Pub Date : 2007-12-01 DOI: 10.1590/S0100-41582007000600006

Severina R. O. Lins, M. Abreu, E. Alves

{"title":"Estudos histopatológicos de Colletotrichum spp. em plântulas de cafeeiro","authors":"Severina R. O. Lins, M. Abreu, E. Alves","doi":"10.1590/S0100-41582007000600006","DOIUrl":"https://doi.org/10.1590/S0100-41582007000600006","url":null,"abstract":"The objective of this work was to follow the process of infection, colonization and reproduction of different isolates of Colletotrichum spp. in coffee plantlets, obtained by embryo culture, using scanning electron microscopy. The embryo explants were obtained from coffee seeds cv. Rubi. Plants produced in vitro were inoculated with 5µL of a 106 conidia.mL-1 spore suspension, on the hypocotyl region and leaves, wounding with an entomological needle. Isolates of Colletotrichum gloesporioides were obtained from stem (IS) and leaves (IL) from plants with symptoms of greasy leaf spot, and from mangos with symptoms of anthracnose (IM). Isolates of Colletotrichum dematium were obtained from healthy coffee plants. Three hours after inoculation (h.a.i.), leaves and hypocotyl fragments were transferred to 1.5mL-microtubes containing modified Karnovsky's fixative solution. Further samples were collected at 3, 5, 12, 16, 24, 48, 72, 96, 114 and 144 h.a.i. Conidia of all isolates adhered more frequently in the depressions of hypocotyls and guard-cells, forming a septum 5 h.a.i. Germ tubes were observed 12 h.a.i. starting from the extremities as well as laterally in the conidia. Appressoria were produced by C. dematium (globoses, trilobullated and foot and comma-shaped), and C. gloeosporioides, respectively globoses, 24 h.a.i. C. gloeosporioides (IH and IF) produced conidiogenic cells 48 h.a.i. Acervuli were produced 72 h.a.i. by C. gloeosporioides (IH), 96 h.a.i. by C. dematium. C. gloeosporioides isolated from mango colonized coffee plant tissues, producing conidiogenic cells without production of acervuli. The most aggressive isolates were IS and IL.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130758041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Atividade antifúngica de extratos de alho e capim-santo sobre o desenvolvimento de Fusarium proliferatum isolado de grãos de milho 大蒜和草提取物对玉米籽粒增生性镰刀菌发育的抗真菌活性

Fitopatologia Brasileira Pub Date : 2007-12-01 DOI: 10.1590/S0100-41582007000600003

Anne Evelyne Franco de Souza, E. Araújo, L. C. Nascimento

{"title":"Atividade antifúngica de extratos de alho e capim-santo sobre o desenvolvimento de Fusarium proliferatum isolado de grãos de milho","authors":"Anne Evelyne Franco de Souza, E. Araújo, L. C. Nascimento","doi":"10.1590/S0100-41582007000600003","DOIUrl":"https://doi.org/10.1590/S0100-41582007000600003","url":null,"abstract":"Among pathogens causing diseases in Zea mays L., Fusarium proliferatum, disseminated by seeds and grain, causes deterioration, death, damping off, rot of roots, stem, stalk and grains. It is thus imperative to treat seeds and grain to preserve quality. The objective of this work was to test antifungal activity at different levels of Allium sativum L. and Cymbopogon citratus Stapf. extracts for F. proliferatum control on maize seeds and grain, and also to observe the effect of those products on seed germination and disease development and evolution in maize seedlings. The effect of A. sativum and C. citratus extracts was evaluated at levels of 0.5%, 1.0%, 2.5%, 5.0% and 10.0% for eight days, measuring the colonies' diameter. Fungus spores were immersed in extract solution at the levels described above, and were evaluated after 6, 12, 18 and 24 immersion hours for conidia germination. Maize seeds were treated with extract solution and inoculated with F. proliferatum, then evaluated forfungus survival, germination, damping off and stem rot of plantlets. Extracts decreased mycelial growth, spore germination and survival incidence of F. proliferatum on maize grain. Allium extract at 2,5% showed better results than other treatments. Natural extracts increased seed germination and controlled damping off and stem rot diseases in maize seedlings.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114341451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 58

Myrothecium leaf spot on coffee plants in nursery 苗圃中咖啡树黑孢子菌叶斑病的发生

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500013

S. F. Silveira, V. Mussi-Dias, E. C. Ponte, P. P. Dias

引用次数: 2

Detection of Rhynchosporium secalis in barley seeds from Argentina through polymerase chain reaction technique 聚合酶链式反应技术检测阿根廷大麦种子中的小麦纹孢菌

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500007

M. O. Rios, P. Fernandez, M. Carmona

引用次数: 4

Reação de genótipos de mamoeiro à varíola e à podridão-do-pé 木瓜基因型对天花和足病的反应

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500008

A. C. Dianese, Luiz Eduardo Bassay Blum, Jaqueline Barbosa Dutra, Leonardo Ferreira Lopes, M. C. Sena, L. F. Freitas, O. K. Yamanishi

{"title":"Reação de genótipos de mamoeiro à varíola e à podridão-do-pé","authors":"A. C. Dianese, Luiz Eduardo Bassay Blum, Jaqueline Barbosa Dutra, Leonardo Ferreira Lopes, M. C. Sena, L. F. Freitas, O. K. Yamanishi","doi":"10.1590/S0100-41582007000500008","DOIUrl":"https://doi.org/10.1590/S0100-41582007000500008","url":null,"abstract":"Papaya (Caryca papaya) genotypes ('NT Red', 'Golden', 'Baixinho de St. Amalia', 'Sunrise Solo', 'Cross Paris', 'Tailândia Verde', 'Tailândia Roxo', 'Tailândia Roxao', 'Sekati' and 'Tainung-1') were evaluated for resistance to black-spot (Asperisporium caricae) and foot-rot (Phytophthora palmivora). The study was conducted in an area where both pathogens occurred naturally and in a greenhouse using soil naturally infested with P. palmivora. Black-spot severity was evaluated using a scale, from 1 (0-3% of the surface covered by lesions) to 6 (> of 50% of the surface covered by lesions). The evaluations were made between March / 2003 and April / 2003 and between October / 2003 and February / 2004. Foot-rot was evaluated, on the field trial, by counting the total number of plants with yellowing or wilt symptoms in the same period. On the greenhouse trials P. palmivora severity was evaluated in each plant using a scale from 0 (no wilt symptoms) to 3 (plant death). In relation to black-spot, the genotype 'Sekati' of the Formosa group presented the lowest average value of severity (2,0) on the foliage while ''Golden' (3,1) and NT Red' (3,7) had the largest. 'Tailândia Roxao' (1,6), 'Tailândia Verde' (1,7) and 'Sekati' (1,7) also had the lowest averages of severity on the fruit, while, 'Tailândia Roxo' (2,3), 'Cross Paris' (2,5), and 'Sunrise Solo' (3,1) presented the largest. In relation to foot rot, 'Tailândia Roxao' (Formosa group) presented low amount of disease and 'Golden', 'Sunrise Solo, and 'NT Red' presented higher values.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122670560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Condições de ambiente favoráveis à germinação e à infecção de Puccinia substriata var. penicillariae em diferentes cultivares de milheto pérola 不同珍珠谷子品种青霉菌萌发和感染的有利环境条件

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500005

A. Costa, A. D. O. D. Carvalho, D. J. Soares, M. G. F. Carmo, C. Pimentel

{"title":"Condições de ambiente favoráveis à germinação e à infecção de Puccinia substriata var. penicillariae em diferentes cultivares de milheto pérola","authors":"A. Costa, A. D. O. D. Carvalho, D. J. Soares, M. G. F. Carmo, C. Pimentel","doi":"10.1590/S0100-41582007000500005","DOIUrl":"https://doi.org/10.1590/S0100-41582007000500005","url":null,"abstract":"The rust caused by Puccinia substriata var. penicillariae in Pearl millet (Pennisetum glaucum) induces yield losses in this forage crop. Considering the lack of information about this disease in Brazil, this research on its epidemiology has been carried out. The mean latency period, the frequency of infection process and size of lesions on four genotypes of pearl millet (Pennisetum glaucum) ENA 1, Composto II, BRS 1501 and HKP were evaluated in the greenhouse. In vitro, the germination of the urediniospores was monitored at different temperatures (10, 15, 20 and 25oC), with or without light. After this, the infection process was compared for the genotypes Guerguera, Souna III, BRS 1501 and ENA 1, in a growth chamber, with the leaf wetting time of 0, 1, 2, 4, 8 and 12 hours, with or without light, and in greenhouse, on the genotypes ENA 1, Guerguera and Souna III, with the leaf wetting times of 3/4, 1, 2, 4, 6 and 8 hours. A mean latency period for pearl millet rust between 10 and 12 days was shown, and the urediniospores germinated in a wide range of temperatures, from 10 to 25oC, with or without light, with a maximum germination at 17.5oC in the dark. In these conditions, the germination of first spores initiated for less than 45 min at a maximum percentage of 88.2%, with 1.7 h of incubation. Leaf infection can also start after 45 min of leaf wetting after inoculation, but there is a beneficial effect of dark and longer leaf wetting time.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123468816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Efeito do chorume líquido de suínos na podridão do colo e tombamento de plântulas de feijoeiro causadas por Sclerotium rolfsii 猪液浆对罗氏菌核引起的颈腐和大豆幼苗脱落的影响

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500010

Rafael Gustavo Ferreira Morales, Idalmir dos Santos, M. A. Danner

{"title":"Efeito do chorume líquido de suínos na podridão do colo e tombamento de plântulas de feijoeiro causadas por Sclerotium rolfsii","authors":"Rafael Gustavo Ferreira Morales, Idalmir dos Santos, M. A. Danner","doi":"10.1590/S0100-41582007000500010","DOIUrl":"https://doi.org/10.1590/S0100-41582007000500010","url":null,"abstract":"Liquid swine manure (LSM) can be used as a source of nutrients and organic matter for some agricultural crops, and may interfere in plant diseases caused by soil-borne plant pathogens. Thus, the effect of LSM on bean (Phaseolus vulgaris) diseases caused by Sclerotium rolfsii was studied. LSM was incorporated into 1 m2 plots at doses equivalent to 0, 20, 40, 60, and 80 m3 ha-1. The soil was infested two months prior to LSM application with 100 g of substrate (unhulled rice) colonized by the pathogen. Eighty bean seeds were sown per plot in two successive cultivations, 1 day and 45 days after LSM application. Intensity of the disease was evaluated based on plant emergence, final stand, and severity of the disease, in both cultivations. Microbial activity, ammonia concentration at the soil surface layer, and fertility levels were only evaluated in the second cultivation. A reduction in disease intensity was observed as LSM doses increased. Among the characteristics evaluated, the factors that best explain such a reduction are increased microbial activity, ammonia concentration, and copper and zinc levels.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133103914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Reação de cultivares de feijão-caupi à mela (Rhizoctonia solani) em Roraima 罗赖马地区豇豆品种对茄根核菌的反应

Fitopatologia Brasileira Pub Date : 2007-10-01 DOI: 10.1590/S0100-41582007000500009

Katia de Lima Nechet, Bernardo de Almeida Halfeld-Vieira

{"title":"Reação de cultivares de feijão-caupi à mela (Rhizoctonia solani) em Roraima","authors":"Katia de Lima Nechet, Bernardo de Almeida Halfeld-Vieira","doi":"10.1590/S0100-41582007000500009","DOIUrl":"https://doi.org/10.1590/S0100-41582007000500009","url":null,"abstract":"Web blight caused by the fungus Thanatephorus cucumeris (Rhizoctonia solani) is one of most important diseases of cowpea (Vigna unguiculata) in the state of Roraima, Brazil. Web blight severity for ten cowpea cultivars was evaluated in Roraima in two consecutive years. The erect cowpea cultivars BRS-Mazagao, IT86D-719, Vita-7 (Epace-1), BR02-Braganca and Pitiuba, as well as the prostrate cultivars BRS-Amapa, BR03-Tracuateua, BR17-Gurgueia, BR14-Mulato and Canapuzinho, were used. The experiment was conducted during 2005 and 2006 in a complete randomized block design with five treatments and four replications. The percentage of diseased foliage was evaluated once a week and the data were used to calculate the area under the disease progress curve. Disease severity was lower on prostrate cultivars indicating a relationship between plant architecture and web blight resistance. The prostrate cultivars, BRS-Amapa, BR03-Tracuateua, BR17-Gurgueia, BR14-Mulato and Canapuzinho, and erect cultivars, BRS-Mazagao, Pitiuba and BR03-Braganca, were more resistant to web blight and can be recommended for planting in areas where the disease is known to occur.","PeriodicalId":211183,"journal":{"name":"Fitopatologia Brasileira","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121430854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19