The management of soil cover plants (intercropping) in orchards can contribute to increase productivity citrus trees. Thus, the present research aimed evaluate different planting systems for Tahiti acid lime grafted onto Flying Dragon trifoliate orange, a dwarfing rootstock, at high density (1,157 trees ha-1). study was set up four tillage systems, using Urochloa ruziziensis as an intercrop species orchard, and conducted five years: no-tillage (NT), no-herbicide (NT-NH), minimum (MT)...

The citrus yield in Brazil is not ranked among the best world, potentially due to inadequate management by growers. low adoption of conservation agriculture (CA) techniques and improper application herbicides are also well-known problems. Thus, this study evaluated use CA techniques, two Urochloa species (ruzi grass signal grass) were used as cover crops. Two different types mowers (ecological, EM; conventional, CM) launched mowed biomass into positions within a young Tahiti acid lime...

Tahiti lime is one of the most exported fruits in Brazil, and state São Paulo accounts for more than half country’s fruit production, drought region a growing concern as rainfall distribution has become increasingly unpredictable. Therefore, identifying best varieties management strategies citrus groves subject increasing research. This experiment was conducted at “Sylvio Moreira” Citrus Center, Brazil; focused on different planting mulching practices scion-rootstock combinations. Two...

The excessive use of glyphosate by Brazilian citrus growers leads to a vicious and unsustainable circle: Increasing the selection pressure resistant/tolerant weeds, as well phytointoxication crop. In addition, there is speculation on consequences using studies are not conclusive. Therefore, this study aimed evaluate management in orchards assessing its effects 5-year field experiment different doses application frequencies. Here, we determine weed control levels, orchard growth fruit yield,...

A citricultura brasileira passa por mudanças no padrão tecnológico, destacando-se o adensamento dos plantios. Dentro desse contexto, implantou-se em 1982 experimento para avaliação de cinco espaçamentos entre plantas (2,0; 3,0; 4,0; 5,0 e 6,0 metros) laranjeira Folha Murcha, enxertada limoeiro Cravo. O ensaio foi conduzido sem irrigação, fixando-se espaçamento entrelinhas 6,5 metros. Em complementação aos dados obtidos os anos implantação estabilização do pomar (1982 a 1993), são...

O objetivo deste trabalho foi avaliar o efeito do recobrimento de sementes milho com ácidos húmicos (AH), bactérias diazotróficas endofíticas e uso em conjunto AH endofíticas, na estimulação crescimento vegetal população estabelecidas planta hospedeira. A adição AH, estimularam vegetal. Os utilizados no têm menor capacidade estimular radicular, comparação ao solução. é uma opção inoculação da espécie Herbaspirillum seropedicae (Z67).

As pesquisas realizadas têm mostrado que o teste de germinação nem sempre revela diferenças desempenho entre lotes sementes, assim, tem-se estudado métodos permitam diferenciar os utilizando-se testes vigor. Assim, conduziu-se este trabalho, com objetivo estudar a eficiência diferentes vigor na avaliação da qualidade fisiológica sementes sorgo, cultivar CMSXS 222, bem como avaliar efeito do volume água e período embebição sensibilidade condutividade elétrica. Foram conduzidos germinação,...

Os ácidos húmicos podem atuar no aumento da população de bactérias diazotróficas introduzidas interior planta e, consequentemente, incremento dos efeitos benéficos sobre a hospedeira. Com este trabalho, objetivou-se avaliar o efeito na inoculação endofíticas, em sementes milho. Foi utilizada estirpe Herbaspirillum seropedicae Z67 BR 11175. A das com as e adição foram realizadas pelo recobrimento milho UENF 506-8, mistura calcário, meio cultura semisólido, água cimentante. As recobertas...

Techniques such as intercropping and minimum tillage improve soil quality, including microbial activity, which stimulates the efficient use of resources by plants. However, effects practices in under citrus orchards have not been well characterized. In this study, we aimed to determine mowing intercrop species on microbiological characteristics beneath a Tahiti acid lime orchard. The orchard was planted using intercropped with two Urochloa (U. ruziziensis—ruzi grass; U. decumbens—signal...

Este trabalho foi desenvolvido com o objetivo de avaliar a qualidade fisiológica sementes milho UENF 506-8 recobertas e resistência do recobrimento utilizando diferentes proporções cimentante. Foi utilizada no das uma mistura calcário meio cultura. Como cimentante cola base acetato polivinila (PVA). O realizado 70% (p/p) calcário, 10% cultura semi-sólido JNFb 20% água. Foram adicionadas essa cimentante: 0,5; 1; 2; 3; 4 5 % (p/p). Para avaliação da simulado transporte semeadura manual,...

Alternaria brown spot (ABS) is the main fungal disease of mandarins. Cause damage to fruits, branches and leaves. For determinations severity in fruit, there a specific diagrammatic scale, which does not occur for foliar lesions. In order standardize leaf reviews ABS citrus, scale was developed from collection symptomatic Dancy tangerine Murcott tangor leaves, with ten levels, zero 97% area damaged by pathogen. They were tested five evaluators who analyzed 100 pictures leaves without use...

The aim of this study was to evaluate the insecticide activity diatomaceous earth (DE), at different temperatures, on two populations Tribolium castaneum and Rhyzopertha dominica previously diagnosed as resistant susceptible phosphine. efficiency DE in control insects evaluated temperatures 20, 25, 30, 35 40 ± 2 ºC. experiments were accomplished Petri dishes containing g whole-wheat grain treated with dose 1.0 kg t-1. constituted by untreated wheat grain. Each dish infested 30 adult insects....

Alternaria brown spot (ABS), caused by alternata f. sp. citri, is the main fungal disease plaguing tangerines. The symptoms are falling leaf and fruit, resulting in loss of production quality. initial leaves characterized small or black spots, surrounded, not, yellowish halos. In dark cortical patches appear that can easily break. this study, winter pruning plants was investigated to complementary control ABS. experiment conducted 10-year-old Honey Murcott tangor plants, where two treatments...

Avaliou-se a eficiência do tratamento de sementes mamoeiro com fungicidas no controle Rhizoctonia solani.Foram realizados dois experimentos nos quais as foram tratadas nas seguintes doses (g i.a.kg -1

Alternaria brown spot (ABS) is a disease caused by the fungus A. alternata f. sp. citri, which results in lesions on fruits, leaves, and branches of several mandarin varieties their hybrids. Due to high cost fungicide application, alternative methods for controlling ABS need be studied. Therefore, this study aimed evaluate use essential oils (EOs) from different mitigate effects ABS. The inhibitory effect concentrations (1, 2, 4, 8, 16 μL·mL−1) EOs Fremont IAC 543 mandarin, 2019Maria Murcott...

Conduziu-se este trabalho com o objetivo de avaliar a qualidade fisiológica das sementes recobertas diferentes misturas e armazenadas, assim como sobrevivência células bacterianas no recobrimento destas. Utilizou-se neste estudo estirpe H. seropedicae Z67 BR 11175. O milho 'UENF 506-8' foi realizado mistura calcário, meio cultura semi-sólido, água cimentante. As foram acondicionadas durante três meses, em sacos papel multifoliado armazenadas duas condições: ambiente laboratório (temperatura...

Abstract Trifoliate orange is one of the rootstocks most used worldwide mainly because it provides excellent quality fruit production. Harvest at correct time among factors that determine physiological seeds. The aim this study was to identify physicochemical changes in ‘Limeira-IAC382’ trifoliate fruits, searching for ideal harvest moment obtain high Fruits were harvested 180, 210 and 240 days after anthesis, stored cold chamber evaluated 0, 15, 30 45 storage. following variables...

Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance drought; however, it susceptible several diseases, requiring search for other rootstocks tolerant factors limiting citrus cultivation. In addition, Brazilian legislation stipulates that seeds can only be commercialized with at least 50% germination rate. Thus, aim of this work was evaluate physiological quality seven rootstocks. The following fruits were harvested: Poncirus trifoliata, Sunki mandarin and their...

There is evidence that signal (SG) and ruzi (RG) grass have an allelopathic effect on weeds. This study aim to evaluate this effects difficult-to-control weeds: hairy beggarticks (HB), benghal dayflower (BD), horseweed (H), sourgrass (S) tall windmill (TWG). The first experiment was installed in a completely randomized design with 2 donor species (SG RG) × 4 extract concentrations (0, 75, 150 225 mg ml−1) factorial scheme four replicates. Weed germination percentage evaluated three-day...

O comprimento da raiz primária das plântulas é usado como teste de vigor sementes poáceas, no entanto, além primária, existe um número variável raízes seminais, as quais também poderiam ser usadas. Com este trabalho, objetivou-se a avaliação seminais milho indicativo do colhidas em diferentes épocas e submetidas métodos debulha. Para obter lotes qualidades, variedade UFV-M100 Nativo foram (experimento 1) debulha 2). No experimento 1, quatro épocas: quando atingiram o teor água 25% 10, 20 30...

There is a growing demand for high quality seeds to obtain citrus rootstocks. Normative Instruction 48 (MAPA) of September 24, 2013, requires minimum 50% germination the marketing seeds. Harvest season one stages seed production with great importance ensure quality, which makes knowing its maturation process an important step. Thus, objective this study was monitor physicochemical changes in IAC-863 Rangpur lime fruits order characterize physiological maturity seeds, and define ideal harvest...

The cultivation of new types oranges can be a good alternative for citrus growers because there is growing domestic market and export prospects. Due to these expectations, it essential search cultivars use in the fresh fruit industry. Therefore, aim this work was physicochemically characterize fruits ‘Navel’ oranges, seeking alternatives with characteristics, such as earliness, lack seeds, color organoleptic characteristics desired by consumer market. five orange were evaluated, namely,...

The purpose of this work was to evaluate the agricultural performance corn in organic and traditional systems no-tillage cultivation during three consecutive years. treatments evaluated were: PDT1 (traditional without fertilization); PDT2 + mineral fertilization herbicide); PDT3 with compounds PDO1 (no-tillage mowing); PDO2 intercropping jack-bean at density 3 plants per linear meter PDO3 6 mowing);and PDO4 Jack-bean left area, cycle 190 days, mowing). It concluded that highest rate provided...

Abstract Alternaria brown spot - ABS (Alternaria alternata) causes lesions on fruits, leaves and branches of mandarins. The cost fungicide application is high alternative managements for the control need to be studied. We aimed evaluate calcium (Ca) nutrition mitigate effects ABS. Murcott IAC 221 tangor plants were nourished with nitrate at three different concentrations (30, 150 300 mg Ca L-1), N content was standardized in nutrient solution treatments (245 L-1 N) ammonium nitrate. In vitro...