Nas últimas safras, um complexo de doenças, chamadas doenças final ciclo da soja (DFC), vem provocando reduções consideráveis no rendimento cultura. Atualmente, não há variedades resistentes a todos os patógenos causadores das DFC. Objetivou-se presente trabalho avaliar o efeito aplicação fungicida em diferentes estádios reprodutivos, nos caracteres agronômicos e severidade DFC três cultivares grupos maturação. O foi conduzido área experimental Universidade Federal Viçosa. Foram realizados...

Objetivou-se neste trabalho realizar o levantamento fitossociológico de plantas daninhas em áreas reforma cana crua, mantidas pousio após a utilização três sistemas manejo do solo duas regiões Estado São Paulo. O foi conduzido no ano agrícola 2007/2008, produção comercial nos municípios Novais-SP e Guairá-SP. A última colheita da realizada na primeira quinzena mês julho 2007. Utilizou-se delineamento experimental blocos casualizados, cujos tratamentos consistiram dos solo: convencional,...

ABSTRACT Fruit flies are the biggest obstacle in guava cultivation, with monitoring of population a fundamental aspect for their management. The objective this study was to assess effectiveness attractive lures fruit trees, produced an organic system. McPhail traps were installed 400 mL solution, four repetitions, and distributed randomized blocks six treatments: Isca Mosca® (5%); Samaritá Tradicional® Torula® yeast; Bio Anastrepha® Ceratrap® juice (50%), 3 weekly reviews. Data on capture...

Eucalyptus plants are sensitive to stress factors in the initial growth phase. The plant regulator trinexapac-ethyl can provide gains eucalyptus plants, a phenomenon known as hormesis. Thus, aim of this work was evaluate effect on two urograndis clones (Clone 1 = I-144 and Clone 2 1407). experiment performed during 90 days after planting (DAP) eucalyptus, 100 L pots, with randomized complete block design. treatments were arranged × 3 factorial scheme, three doses (0, 30 60 g i.a. ha-1), four...

ABSTRACT: The objective of the present study was to determine periods interference velvet bean on ratoons sugarcane cultivar 'RB855536' and identify its potential for decreasing crop yield quality harvested product. experiment arranged in a randomized block design, with 18 treatments divided into two groups four replicates per treatment. In first group, kept free from nine different periods, beginning at bud sprouting: 0-15, 0-30, 0-45, 0-60, 0-90, 0-120, 0-150, 0-180 days after budding...

A renovação dos canaviais é importante para manter elevada a produtividade agrícola da cultura e realizada em média após cinco cortes, com o objetivo de comparar efeito residual das culturas sucessão nos diferentes sistemas plantio sobre ocorrência espontânea plantas daninhas área reforma cana crua, instalou-se experimento ARGISSOLO VERMELHO-AMARELO Eutroférrico, localizado no município Novais-SP, canavial colhido sem queima prévia últimos cortes. Utilizou-se delineamento experimental blocos...

Weed interference is one of the main factors responsible for reducing productivity peanut crop. Among weed control methods, chemical considered tools, however, herbicides registered this crop are scarce. The objective study was to evaluate selectivity applied in post-emergence Runner cultivars. For this, an experiment performed 11x5 factorial scheme, meaning 10 plus (without herbicide) and five cultivars, with four replicates. Visual evaluations phytointoxication were carried out at 7, 14 21...

An increased incidence and severity of Orthotospovirus species has been observed in the peanut crop. The typical symptoms virus, usually known as ringspot spotted wilt other crops, include mosaic, chlorotic ring-shaped spots, necrosis, plant stunting. This study aimed to verify occurrence this virus growing areas São Paulo State, Brazil, identify predominant species, determine losses resulting from presence virus. Surveys were carried out four commercial sown municipalities Santa Adélia...

Studies on the residual effect of herbicides commonly used in sugarcane peanut crops are essential for crop management due to expansion areas fields throughout country. Therefore, this work evaluates pre-emergence five cultivars. The experimental design was a randomized block with treatments factorial arrangement: 11 (10 + 1 water control) x 5 (peanut genotypes) four replications. To evaluate effect, plants that normally emerged at 15 days after application (DAA) were counted and visual...

Entre os fatores ambientais, a deficiência hídrica tem efeito em diversosprocessos morfológicos e fisiológicos das plantas, podendo afetar ocrescimento o desenvolvimento culturas, refletindo na produtividade.Diante disso, objetivou-se avaliar as características fisiológicas de genótiposde amendoim submetidos à hídrica. Realizou-se um experimentoem blocos inteiramente casualizados, com tratamentos dispostos emesquema fatorial 12 × 2, tendo como genótipos duascondições hídricas, cinco...

At the application time of sugarcane ripeners, most times, morning glory plants, that have escaped, survived or emerged, are entwined on stalks and these plants at this in different reproductive stages (and it becomes more difficult to control) causing a mechanical crop yield damage. The main aim research was evaluate ripeners effect seeds germination, seedling development abscission structures glory. treatments consist five ripeners: ethyl-trinexapac (300 ga.i.ha-1), glyphosate (216...

Sourgrass (Digitaria insularis) has been reported as one of the main weeds in Brazil, including reports it being glyphosate-resistant. This study determines coexistence period soybean cv. TMG7063 IPRO with a weed community predominated by D. Insularis without negative interference its final production (period prior to - PPI), well which crop should remain free this (total prevention) Brazil. The periods and control studied were 15, 30, 45, 60, 75, 90, 105, 120 days after sowing (DAS) crop,...

Peanut (Arachis hypogaea L.) is the fourth most cultivated oilseed in world, but its cultivation subject to fluctuations water demand. Current studies of tolerance between cultivars and physiological mechanisms involved plant recovery after drought are insufficient for selection tolerant cultivars. We evaluated different peanut deficit subsequent rehydration, based on biochemical status. Gas exchange, photosynthetic pigments, F

Sourgrass (Digitaria insularis (L.) Fedde) is frequently reported as one of the main weeds in grain production, along with several reports herbicide resistance. The objectives this study were (1) to understand length time that maize crop, cv. P4285VYHR PIONEER could coexist a weed community dominated by D. plants without suffering any negative impact on its final and (2) period for which crop needs be free interference ensure optimal production. periods and/or control were: 15, 30, 45, 60,...

The cotton leafworm is an important defoliating pest of in Brazil, and occurs all regions where the crop cultivated. purpose this study was to evaluate effect larval densities A. argillacea after different infestation periods on yield components four cultivars. experiment carried out Pindorama, SP, 2008/2009 growing season. cultivars IAC-25, DeltaOPAL, Fibermax 966 993 were artificially infested with larvae at three times (30, 60 90 DAE) (0, 2, 4, 6 per plant). average boll weight (g), fiber...


 Water deficit is considered the most critical environmental factor for peanut production in Brazil, as it constitutes one of major constraints to expansion its cultivation suitable crop zones country. Determining water demand fundamental increasing yield with lower consumption. The present study aimed evaluate effects full and irrigation levels (L1 = 8%, L2 27%, L3 63%, L4 94% L5 100% replenishment evapotranspiration) on development, growth sown two times, February March. Treatments...

The cotton crop yield is directly associated with the efficient control of pests. This work evaluated relationship different densities A. argillacea per plant at ages seed germination four cultivars: IAC 25, Delta Opal, Fibermax 993, and 966. A randomized block design was set up in 4x3 factorial replications. Densities larvae (0, 2, 4, 6 larvae) major factor while (30, 60 90 days after emergency - DAE) second level factor. Larvae were released on plants 30, DAE. seeds manually picked, for...

Among the factors that may influence germination process of seeds, water deficiency is considered most important.The present study aims to evaluate physiological response peanut genotypes deficiency.The experiment was conducted in a completely randomized design with four replications 12 x 7 factorial scheme and seven polyethylene glycol 6000 concentrations corresponding osmotic potentials 0.00; -0.10; -0.20; -0.40; -0.60; -0.80 -1.00 MPa.The data were submitted analysis variance Tukey's test...