1. Remoção de resíduos de fungicidas por meio de chuva simulada e de irrigação em batateira e tomateiro - André Rocha Duarte
Estudaram-se os resíduos de mancozeb (Mn), mancozeb NT (NT) e hidróxido de cobre (Hc) em batateira e tomateiro em condições controladas, para analisar a influência de diferentes intensidades (0, 30, 40, 60 e 97 mm/h), duração de chuva simulada (5, 10, 20 e 40 min) e tempo de secagem da calda fungicida (1, 2, 4, 6 e 24 h). Em condições de campo, avaliou-se a remoção de resíduos da folhagem de batateira pela irrigação e chuva em dois ensaios. Sob condições controladas, pulverizaram-se plantas com 45 a 60 dias após o plantio com Mn e NT, ambos a 2,4 kg...

2. Síntese e estudo da atividade fungicida do avenaciolídeo e de novas bis-lactonas análogas - Pauline Martins de Barrros
A rota sintética utilizada neste trabalho teve como material de partida um carboidrato, a D-glicose. Os carboidratos são muito úteis como precurssores sintéticos, principalmente por possuírem pureza enantiomérica e a presença de muitos grupos funcionais. A partir da D-glicose, várias reações foram realizadas, obtendo-se um total de 30 compostos, sendo 18 deles inéditos. Os compostos finais das diversas rotas sintéticas são (1R,5R,6R)-6-alquil-4-metilideno-2,7- dioxabiciclo[3.3.0]octano-3,8-diona, sendo os grupos alquila: propila [XIIIa], butila [XIIIb], 3-metilbutila [XIIIc] e octila [XIIId]. A bis-lactona [XIIId] é o (-)avenaciolídeo, um produto natural isolado de culturas de Aspergillus avenaceus, que apresenta atividade fungicida. O avenaciolídeo e os análogos...

3. Mango stem-end rot (Botryosphaeria dothidea) disease control by partial-pressure infiltration of fungicides - Plan, M. R. R.; Joyce, D. C.; Ogle, H. J.; Johnson, G. I.
The in vitro efficacy of several fungicides against Botryosphaeria dothidea (syn. Dothiorella dominicana) and their in vivo efficacy in controlling mango cv. Kensington Pride stem-end rot on partial-pressure infiltration v. dip treatment of green mature fruit was evaluated. In vitro sensitivity of B. dothidea to Benlate (benomyl), Sportak (prochloraz) and Scala (pyrimethanil) at 10 dilutions of the manufacturer's recommended rate was first determined at typical cold (13degreesC) and shelf (23degreesC) storage temperatures. The effectiveness of partial-pressure infiltration and conventional hot (52degreesC) or cold (26degreesC) dipping of fruit after harvest was then evaluated using the commercially recommended rate for each fungicide....

4. Efeito da aplicaçao de fungicidas no pradao espacial de ácaros fitoseídeos associados à cultura da vinha - Bacelar, Sofía; Rodrigues, Raul; Mexia, António; Brito, L. Miguel
O conhecimento do padrao espacial dos fitoseideos e necessario para o desenvolvimento de metodos de amostragem e para o estudo da toxidade de campo dos pesticidas sobre estas populacoes. Num ensaio realizado em Ponte de Lima numa vinha da casta Loureiro avaliou-se o efeito de tres aplicacoes consecutivas de cinco fungicidas (mancozebe, folpete, propinebe, oxicloreto de cobre, a mistura cimoxanil+famoxadona) e da agua sobre as populacoes autoctones de fitoseideos. O numero medio de fitoseideos por folha foi quantificado periodicamente, apos a aplicacao dos tratamentos, de acordo com a metodologia da Organizacao Internacional de Luta Biologica e Proteccao Integrada e os...

5. Fungicides and their action, - Horsfall, James G. (James Gordon), 1905-1995.
8 p.l., 239, [1] p.

6. Insecticides, fungicides, and weed killers: a practical manual on the diseases of plants & their remedies for the use of manufacturing chemists, agriculturists, arboriculturists and horticulturists, by E. Bourcart, D. SC. Tr. from the French and adapted to British standards and practice. - Bourcart, Emmanuel.
2d English ed., rev. and enl. by Thomas R. Burton ...

7. Actividad bactericida y fungicida de algunas plantas utilizadas en la medicina tradicional venezolana - Elisa A. Lapenna M; Gerardo E. Medina Ramírez; Lorena Díaz; Karen Aguillón; Hadly Marín
Estudio de una evaluación realizada a la actividad antibacteriana y fungicida presente en las plantas.

8. Controle químico de Fusarium moniliforme em sementes de milho: metodologia de avaliação e efeitos sobre a qualidade fisiológica - Moraes,Maria H. D.; Menten,José O. M.; Gravena,Jouse C.; Alves,Camila A.
Objetivou-se verificar o efeito da luz sobre o crescimento micelial de Fusarium moniliforme em meio de cultura contendo fungicidas, o melhor regime luminoso e a variável a ser utilizada para detectar o patógeno em sementes tratadas de milho (Zea mays), e o efeito do tratamento sobre a qualidade sanitária e fisiológica das sementes. Os fungicidas avaliados foram fludioxonil + metalaxil-m (três concentrações), difenoconazole, acibenzolar-S-metílico e captan + tiabendazole. Para avaliação do crescimento micelial, os fungicidas foram adicionados em meio de cultura, nas concentrações de 100, 10 e 1 æg/ml. Incubaram-se as placas sob temperatura de 20±2 ºC e três condições...

9. Enhanced degradation of metalaxyl in agricultural soils of São Paulo State, Brazil - Papini,Solange; Andréa,Mara Mercedes de
This work investigated the effect of repeated applications on enhanced degradation of metalaxyl in two different agricultural soils used for cultivation of orange and lemon from Casa Branca and Itapetininga districts of São Paulo State, Brazil. Soil samples were collected from areas repeatedly treated with commercial ridomil 50GR for six successive years, and from other areas never exposed to this fungicide. At the laboratory, soil samples received a 14C-metalaxyl solution and its degradation was studied through radiometric techniques to measure biomineralization and recovery of extractable- and soil-bound products. Enhanced degradation was verified only in one soil, although partial degradation and...

10. Reduced sensitivity of Uncinula necator to sterol demethylation inhibiting fungicides in southern Australian vineyards - Savocchia, S.; Stummer, Belinda E.; Wicks, Trevor J.; Van Heeswijck, Robyn; Scott, Eileen Sandra
Isolates of Uncinula necator with reduced sensitivity to triadimenol and, to a lesser extent, fenarimol have been detected in Australian vineyards. Grapevine leaves and berries affected by powdery mildew were collected from a home garden and 13 vineyards in nine viticultural regions in Australia between 1993 and 1998. Single-spore isolates of U. necator established from vines, either not exposed to DMIs (‘unexposed’ collection) or treated with DMIs (‘selected’ collection), were maintained on micropropagated grapevines in vitro. A bioassay for fungicide sensitivity was used to test 60 single-spore isolates of U. necator for sensitivity to triadimenol. Of these, 34 were tested...

11. Evaluation of fungicides for the control of false smut of rice caused by Ustilaginoidea virens (Cooke) Tak. - Ahonsi, MO; Crop production & Crop Protection Department University of Agriculture, P.M.B. 2240 Abeokuta, Nigeria ;; Adeoti, AYA; Crop production & Crop Protection Department University of Agriculture, P.M.B. 2240 Abeokuta, Nigeria ; Otiade @ unaab . edu.ng
Benomyl, Copper Oxychloride, Iprodione, Thiabendazole (TBZ) and Mancozeb were evaluated both in the laboratory and field study in 1994, for the control of false smut of rice caused by Ustilaginoidea virens (Cooke) Tak. in upland rice in Edo State, Nigeria. In the laboratory the fungicides were evaluated at three concentration levels, X, 2X, and 0.5X, where X is the recommended field rate. Copper Oxychloride, Benomyl, and Thiabendazole were most effective in – vitro, completely inhibiting the mycelial growth of U. virens even at 0.5X c(5 g/l,1.5g/l, and 0.3 ml/l, respectively). Four sprays of any of the five fungicides at an...

12. Efficacy and economics of fungicide spray in the control of late blight of potato in Ethiopia - Kassa, Bekele; ;; Beyene, Hailu; ;
During the 1996 and 1997 seasons research was done at Holetta on the economic benefits of integrated management of late blight using genetic resistance and chemical (preventive and /or contact) methods. Varieties Tolcha (tolerant to late blight) and AL-624 (susceptible to late blight) were studied with five chemical controls during crop development. The chemical control started immediately after the first disease symptom was observed (41days after crop emergence) and chemical control was repeated after every 7 days for contact fungicides and 21 days for preventive fungicide. In 1997 AL-624 and Tolcha received 4 -5 and 2 applications, respectively, of the...

13. Export papaya post-harvest protection by fungicides and the problems of the maximal limit of residues - Dembele, Ardjouma; LABORATOIRE Central d'Agrochimie et d'Ecotoxicologie, LANADA 04 BP 612 Abidjan 04 COTE D'IVOIRE. ; labeco@aviso.ci; Traore, Sory Karim; UFR des Sciences et Gestion de l'environnement, Université d'Abobo - Adjamé 02 B.P. 801 Abidjan 02/COTE D'IVOIRE ;; Kone, Mamadou; UFR des Sciences et Gestion de l'environnement, Université d'Abobo - Adjamé 02 B.P. 801 Abidjan 02/COTE D'IVOIRE ;; Coulibaly, Dotana Ténébé; UFR des Sciences de la Nature/Protection des Végétaux et de l'environnement, Université d'Abobo - Adjamé, 02 B.P. 801 Abidjan 02/COTE D'IVOIRE;
The post-harvest maturity of papaya fruits is influenced by several environmental factors including temperature, light and ventilation of the surrounding wall. The maturity, presence and attacks or rots, and the accumulation of fungicide residues in the papaya was evaluated on papaya fruits treated with different fungicide. Thiabendazole-treated fruits did not rot 21 days after treatment and this fungicide was the most satisfactory with detected residues lower than the European Union's 2000/48/EC guideline. Key Words: Post-harvest, papaya, fungicides, phytotoxic, thiabendazole, residues maximal limit. African Journal of Biotechnology Vol.4(1) 2005: 109-112

14. In Vitro evaluation of cashew nut shell liquid (CNSL) as a fungicide against wood rotting basidiomycetes - Adetogun, AC; Department of Forest Resources Management, University of Ibadan, Ibadan. ;; Adegeye, OA; Department of Forest Resources Management, University of Ibadan, Ibadan. ;
The crude extract of the shell of cashew nut obtained from the cashew tree (Anacardium occidentale) was evaluated in vitro for fungitoxicity against Coriolopsis polyzona, Pycnoporus sanguineus, Ganoderma lucidum and Lenzites palisoti that cause serious decay on wood in Nigeria. Growth of the four pathogens in the medium of cassava dextrose agar (CDA) containing eight different concentrations of CNSL at levels of 400ppm, 800ppm, 1600ppm, 2000ppm, 2400 ppm, 2800ppm and 3200ppm was also studied. Most of the levels of CNSL concentrations exhibited potent antifungal activity against all the four pathogens. Of the four test fungi, Coriolopsis polyzona was the most...

15. Impact of fungicide application and late blight development on potato growth parameters and yield in the tropical highlands of Kenya and Uganda - Ojiambo, P. S.; ;; Namanda, S.; ;; Olanya, O. M.; ;; El-Bedewy, R.; ;; Hakiza, J. J.; ;; Adipala, E.; ;; Forbes, G.; ;
The effects of fungicide application and late blight development on potato varieties with different levels of resistance to late blight were quantified in Kenya and Uganda during the 1999 cropping seasons. Experiments were laid out in a randomised complete block design with three replications in three sites, Loreto and Kabete in Kenya and Kalengyere Research Station in Uganda. At each experimental site, plots consisted of 4 m rows with plants spaced at 0.75m x 0.3 m. Treatments consisted of three potato varieties and four application intervals of Dithane M-45 arranged in a factorial combination. Areas under disease progress curves (AUDPCs)...

16. The effect of fungicides on vesicular-arbuscular mycorrhizal symbiosis. II. The effects on area of interface and efficiency of P uptake and transfer to plant - Sukarno, N.; Smith, F. A.; Smith, S. E.; Scott, Eileen Sandra
Two experiments were conducted under controlled environmental conditions to determine the effects of the three fungicides, Benlate®. Aliette® and Ridomil®, on efficiency of P uptake from the soil and transfer across the living plant-fungal interface- of onion plants (Allium cepa L.) associated with Glomus sp. 'City Beach' (WUM 16), P applied to the soil did not apparently increase the rate of transfer (flux) of P to the plant via the fungal partner of the mytorrhiza. Benlate reduced P inflow and transfer across the interface in one of the experiments. The rate of P uptake per m living external hyphae was...

17. Survival and growth of Pinus patula at two years in response to harvest residue and pest management, in Mpumalanga, South Africa : scientific paper - Rolando, Carol; ;; Allan, Ross; ;
Previous research has indicated that the presence of harvesting residues, post-planting temperature and rainfall, and insect pests and diseases, are among the main causes of mortality during re-establishment of Pinus patula stands. The main objectives of this work were to confirm previous observations on the effects of these factors on initial survival and growth of P. patula seedlings. Three harvest residue management treatments (burning, harvesting residues left in situ or removed) and four pest management treatments applied at planting (fungicide, insecticide, fungicide and insecticide, and a control, where no pesticides were used) were tested in combination with each other. For...

18. Uso potencial de algunos extractos de corteza de Pinus caribaea var. hondurensis y Pterocarpus officinalis, en el control de bacterias y mohos en la industria de pulpa y papel / Ilvania Gutiérrez - Gutiérrez G., Ilvania J.; Mogollón B., Gladys; Universidad de Los Andes. Facultad de Ciencias Forestales y Ambientales, Tesis, 2002
Mecanografiado

19. Hexaclorobenceno : 1as jornadas nacionales: Barcelona, 23-24 de mayo de 1988: programa y resumenes de ponencias y comunicaciones
L'obra recull el programa d'aquestes jornades i els resums de les ponències i comunicacions que s'hi varen presentar.

20. Hexaclorobenceno: 1as jornadas nacionales : Barcelona, 23-24 de mayo de 1988: libro de actas
El volum recull les 20 comunicacions presentades durant la cel·lebració d'aquestes jornades. L'objectiu d'aquestes jornades era reunir en un fòrum comú tots els investigadors i grups que estudien a Espanya l'hexaclorobenzè des dels diferents punts de vista possibles.

Página de resultados:
1  2  3  4  5  6  7  8  9  10  Siguiente