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Search Results: 1 - 10 of 5467 matches for " Juliana Altafin Galli "
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Damage Caused by Psyllids and Influence of Climatic Factors in Brazilian Accesses of Guava Trees Cultivated in Organic System  [PDF]
Juliana Altafin Galli, Marcos Doniseti Michelotto, Maria Beatriz Bernardes Soares, Ant?nio Lucio Melo Martins, Ivan Herman Fischer
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.510158
Abstract:

The psyllid (Triozoida sp.) is the primary pest of guava tree in the Central Northern region of S?o Paulo State, Brazil. The variation of climatic factors may influence directly or indirectly the behavior of agricultural pests. The present work had objectives to evaluate the damages caused by psyllid in accesses of guava trees in order to identify materials with potential resistance to pest and the possible correlations of the damage with the meteorological factors, in an orchard of guava conducted in an organic system. Eighty-five guava accesses were evaluated. Each one was analyzed at random 10 leaves containing the symptom of the psyllid attack, through visual range of notes. The averages of the notes were compared by Scott-Knott test at 5% probability. The 25 accesses with the highest average damage of psyllid had the data submitted to correlation (Pearson), with the minimum and maximum temperature (°C), precipitation (mm) and relative humidity (%). Guava accesses used commercially were the most susceptible to the attack of psyllid, compared to the selections, with an emphasis to access “L4P14”, “L7P28” and “L8P32B”, which were the least attacked. The study of correlation between psyllid damages and meteorological factors, must be used the medium temperature, relative humidity and rainfall accumulated in the period of 14 days before the evaluations. There is a positive correlation between minimum temperasture, precipitation and relative humidity with the damage of psyllids in leaves of guava.

Tratamento fungicida em semente de milho super-doce
Ramos, Nilza Patrícia;Marcos Filho, Julio;Galli, Juliana Altafin;
Revista Brasileira de Sementes , 2008, DOI: 10.1590/S0101-31222008000100004
Abstract: the objective of this research was to evaluate the effect of fungicide treatment on the physiological potential and seed health of do-04 super sweet corn hybrid seeds classified by differences in shape. for this, pure seeds of the do-04 hybrid harvested in 2004 were used. a completely random design was used in a 2 x 3 x 4 factorial scheme, i.e. two seed shape classes (flat and round), three seed lots and four fungicide treatments (untreated seeds, fludioxonil, captan ts + thiabendazol, and captan ts + thiram ps). after the fungicide treatments, germination, vigor ( germination speed, cold test, accelerated aging) and seed health tests were performed. results showed that germination and vigor of round do-04 hybrid super sweet corn seeds were higher than the flat ones. in addition, combinations of captan + thiabendazol and captan + thiram were efficient to control f. moniliforme, cephalosporium sp. and penicillium sp and were beneficial to seed vigor.
Effect of Infestation of Alabama argillacea (Lepidoptera: Noctuidae) at Different Ages of Cotton Plants in Yield  [PDF]
Marcos Doniseti Michelotto, Jacob Crosariol Netto, José Fernando Grigolli, Antonio Carlos Busoli, Willians Cesar Carrega, Everton Luis Finoto, Juliana Altafin Galli
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.510159
Abstract:

The cotton leafworm is an important defoliating pest of cotton in Brazil, and occurs in all regions where the crop is cultivated. The purpose of this study was to evaluate the effect of larval densities of A. argillacea after different infestation periods on the yield components of four cotton cultivars. The experiment was carried out in Pindorama, SP, Brazil, in the 2008/2009 growing season. The cultivars IAC-25, DeltaOPAL, Fibermax 966 and Fibermax 993 were artificially infested with A. argillacea larvae at three times (30, 60 and 90 DAE) and four densities (0, 2, 4, and 6 larvae per plant). The average boll weight (g), fiber percentage (%), 100-seed weight (g) and yield (kg·ha-1) were evaluated. With increasing infestation density of A. argillacea, the cotton yield of the cultivars decreased. The presence of larvae significantly reduced the weight of 100 seeds of cultivar Fibermax 966. Initial infestations reduced the boll weight of IAC-25 and DeltaOPAL, while cultivars Fibermax 966 and Fibermax 993 were most affected by late infestations. Early infestation compromised fiber percentage of cultivar DeltaOPAL and late infestations were most harmful to cultivar Fibermax 966. Early A. argillacea infestation reduced the yield of DeltaOPAL, while infestations 60 DAE caused the most damage to IAC-25, and the other cultivars were not affected by the moment of infestation.

Avalia??o da incidência de antracnose, do desempenho e estado nutricional de variedades de mangueira, para cultivo organico, na regi?o centro-norte do Estado de S?o Paulo
Galli, Juliana Altafin;Silveira, Luis Cláudio Patterno;Michelotto, Marcos Donizeti;Martins, Antonio Lucio Melo;
Revista Brasileira de Fruticultura , 2009, DOI: 10.1590/S0100-29452009000300012
Abstract: the consumer's profile change, allied to the risk of toxic substances contamination, is inducing the search for ecological alternatives of fruits production. the objectives of this work were to evaluate the anthracnose incidence, the development and nutritional status of mango varieties organically cultivated in pindorama, sp. seventeen mango varieties were used. the experiment was designed in completely randomized blocks, with 17 treatments (varieties) and six replications. the anthracnose severity in leaves was evaluated by a diagrammatic scale, with grades attributed to the symptoms. the growth and development (plant height, stem and crown perimeter) and the nutritional state indicated by leaf analysis were used for evaluation of the varietal behavior. the varieties bourbon, rocha and rosa could be considered very susceptible to anthracnose and iac 111, alfa, beta and parvin were resistant; the mango varieties presented the same growth pattern; the largest plant heights corresponded to the largest diameters of the stem and crown; the parvin variety presented the best performance among the varieties in relation to the anthracnose resistance, height and diameter of the stem and crown, and could be recommended for organic cultivation. the omega and alfa varieties also presented good development and could be indicated for that cultivation, at least in that initial phase; surpresa and rosa varieties did not present good field development in relation to the others, and should not be recommended for the organic cultivation, mainly the variety rosa, which is quite susceptible to anthracnose. the concentrations of n, p and k were higher in the vegetative phase of the plants, when compared to the low concentration of ca; there was lack of boron in all the studied varieties; rosa variety probably suffered toxicity to the excess of manganese, causing decrease in its development.
Sobrevivência de patógenos associados a sementes de soja armazenadas durante seis meses
Galli, Juliana Altafin;Panizi, Rita de Cássia;Vieira, Roberval Daiton;
Revista Brasileira de Sementes , 2007, DOI: 10.1590/S0101-31222007000200027
Abstract: seeds infected by pathogens in the field can have their health altered during storage, through viability loss. the objective of the present study was to verify the effect of storage of soybean seeds in their health quality, inoculated with pathogens in field conditions. the soybean brs 133, msoy 6101, conquista and lideran?a varieties were inoculated, in the field, by pulverization with a spore suspension of two isolates of colletotrichum dematium var. truncata and phomopsis sojae. after harvest, seed health tests were carried out, without and with surface disinfection of the seeds with sodium hypochlorite at 1% for 3 min. after this analysis, the seeds were stored in a cold chamber for six months, and seed health tests were newly performed. the results of the work allow concluding that the storage of the seeds in cold chamber, for a period of six months, reduced the incidence of the pathogens phmopsis sojae and colletotricum dematium var. truncata in the seeds.
Avalia??o da qualidade física, fisiológica e sanitária de sementes de milho durante o beneficiamento
Fessel, Simone Aparecida;Sader, Rubens;Paula, Rinaldo Cesar de;Galli, Juliana Altafin;
Revista Brasileira de Sementes , 2003, DOI: 10.1590/S0101-31222003000400010
Abstract: the objective of this research was to evaluate the physical, physiological and sanitary quality of corn seeds during conditioning. sixteen samples of a corn seed lot hybrid d766 produced in 2001/2002 was used, classified as medium short flat and short round, from the screens 20 and 22. the seed samples were obtained during the following conditioning steps: reception, pre-cleaning, post-gravity separator, post-grader and after bagging. the seeds were evaluated for the moisture content, standard germination, first germination count, speed of germination index, accelerated aging, cold test, electrical conductivity, seedling field emergence, health test through the filter paper and injury test. the experimental design used was completely randomized with 4 replications and the mean comparison was made through the scott-knott multiple path comparison test at 5% level of probability. according to the obtained results it was concluded that mechanical injury can occur at any stage of seed conditioning and is cumulative and the corn seed conditioning may improve the seed lot quality in for germination, vigor and health.
Efeito de Colletotrichum dematium var. truncata e Phomopsis sojae na qualidade sanitária e fisiológica de sementes de soja
Galli, Juliana Altafin;Panizzi, Rita de Cássia;Vieira, Roberval Daiton;
Summa Phytopathologica , 2007, DOI: 10.1590/S0100-54052007000100006
Abstract: several pathogens can affect the quality of soybean seeds. with the objective of evaluating the transport of fungi through seeds from soy-bean plants artificially inoculated in field conditions, with two isolates of c. dematium var. truncata and one isolate of p. sojae and their effects on the sanitary and physiologic quality of seeds, four soybean varieties (brs 133, msoy 6101, conquista and lideran?a) were sowed in field. each block was inoculated with c. dematium var. truncata isolate 1 and isolate 2, p. sojae, and a block without inoculation (control). the seeds were manually harvested and were submitted to the blotter test, initial water content, 100 seeds weight, germination in roll paper and emergence in sand. the seeds presented a high infection for fusarium spp.. phomopsis sojae was found in all the treatments, and its incidence was related with the incidence of fusarium sp. in seeds. there were differences in pathogenicity among isolates of c. dematium var. truncata, being the isolate 1 the most pathogenic one, specially for the variety lideran?a (25% of infection for c. dematium var. truncata). fusarium sp. influenced negatively the germination of variety msoy 6101, independently of treatment, and c. dematium var. truncata affected negatively the germination of varieties conquista and lideran?a. the values of germination in sand were significantly higher than germination in paper, for the varieties msoy 6101, conquista and lideran?a.
Effects of storage period and mass on seed germination of the Carabao mango
Juliana Altafin Galli,Maria Beatriz Soares,Ant?nio Lucio Melo Martins
Biotemas , 2012,
Abstract: The mango is a species that produces recalcitrant seeds, which can be difficult to store. The objective of this work was to evaluate the effect of storage period and mass on the germination of Carabao mango seeds. The fruits were picked and the pits were dried. The seeds were weighed and separated in two classes: I) with a mass up to 19.0g, and II) above 19.0g. The seeds were treated with 60% thiabendazol, wrapped in perforated transparent polyethylene bags, maintained in a laboratory, and germinated directly in the plastic bags. The statistical analysis used a randomized block design, with four repetitions, that consisted of five storage periods: 0 (zero), 7, 14, 21 and 28 days. A regression analysis was made. Due to the small number of seeds with a mass less than 19.0g, the germination tests using two classes were done only for the periods of zero and the first seven days of storage. It was found that the seeds of Carabao mango, when treated with fungicide, performed best when sown after seven days of storage in polyethylene bags, and that the mass of the seeds positively influenced germination.
Effect of presoaking seeds in biostimulant solution on germination and vigor of Lactuca sativa L.
Maria Beatriz Bernardes Soares,Juliana Altafin Galli,Paulo Espíndola Trani,Ant?nio Lucio Melo Martins
Biotemas , 2012,
Abstract: The objective of this work was to analyze the germination and seed vigor of two lettuce (Lactuca sativa L.) cultivars that were presoaked in biostimulant solutions. The experimental design was a randomized block with four replications in a 2x7 factorial arrangement. Seeds of the cultivars Bariri and Maravilha das Quatro Esta es (MQE) were presoaked for 16h in solutions of 0, 5, 10, 15, 20, 25 and 30mL.L–1 of a commercial biostimulant. The percentage of germination, germination speed index, seedling length at 7 days after sowing and the ratio between the shoot and radicle of the seedlings were evaluated. The cv. Bariri was significantly superior in all aspects. The use of presoaking seeds in plant growth regulator did not affect the germination, but influenced seedling vigor. Presoaking Bariri in 10mL.L–1 resulted in the highest germination speed index (19.60) while for MQE the best result was obtained after presoaking in 15mL.L–1 (17.75). The results suggest that in favorable conditions presoaking lettuce seeds in biostimulant does not alter the germination, but improves germination speed and seedling vigor, and increases the chances of crop establishment.
Qualidade de mangas cultivadas no Estado de S?o Paulo
Galli, Juliana Altafin;Michelotto, Marcos Doniseti;Silveira, Luis Cláudio Paterno;Martins, Ant?nio Lúcio Melo;
Bragantia , 2008, DOI: 10.1590/S0006-87052008000300030
Abstract: the mango (mangifera indica l.) is one of the most consumed fruits in the world. the choice of variety for cultivation should be related with preferences of the consuming market, that include fruits with larger pulp percentage and larger tenor of total soluble solids, properties of great importance for industrial processing and for internal and external markets. the overall quality of fruits from 39 mango varieties (adams, alda, brasil, cacipura, carabao, carrie, castro, edward, eldon, família, foice, haden, haden 2h, haden tr, iac 10 bourbon, itamarati, joe welch, julima, lima peru, m20-222 winter, mabrooca, neves, palmer, pele de mo?a, petacon, pope, regina, rocha, rosa, rubi, sensation, smith, surpresa, torbet, torrinha, ubá, wesley, white langra and zill) from the collection of pólo apta centro-norte, located at pindorama, s?o paulo state, was appraised, with the objective of gathering information regarding fruits produced in this area. twenty fruits of each variety were picked ripe traits such as fresh weight, weight of the peel, weight of the pit, pulp, peel and pit percentages, tenor of total soluble solids (sst) and infestation for fruit-flyes were evaluated. a design in randomized blocks was used for the analysis of the data of pulp percentage and sst. averages were compared by the tukey test of 5% of probability. based on results, it can be concluded that the variety smith stands out for exhibiting fruits with larger total weight (694 g), larger pulp percentage (85,7%), smaller pit percentage (6,3%) and larger tenor of sst (24,9o brix), adequate for industrial processing and for internal and external markets.
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