ABSTRACT:The high seedlings quality is essential for deployment of homogeneous orchards. This study evaluated the baruzeiro (Dipteryx alata Vog) seedlings formation on different substrates within protected environments. It was used substrates with100% of cattle manure; 100% of cassava stems; 100% of vermiculite; 50% of cattle manure + 50% of cassava stems; 50% of cattle manure + 50% of vermiculite; 50% of cassava stems + 50% of vermiculite; and + ⅓ of cattle manure + ⅓ of cassava stems + ⅓ of vermiculite. These substrates were tested in protected areas: greenhouse; black shade net of 50% shading; and aluminized thermo-reflective screen of 50% shading. A completely randomized experimental design with five replicates of four plants was adopted. Initially, data were submitted to analysis of individual variance of the substrates, in each environment of cultivation, then performing the evaluation of the residual mean square and the analysis of these environments together for comparison. The best substrate for baruzeiro seedlings was pure vermiculite. The substrates with 100% of manure and the substrate with 33.33% of the mixed studied materials can be used for seedlings formation. The environment with screen can be indicated for the production of baruzeiro seedlings, since it gave vigor to the seedlings. KEYWORDS:Dipteryx alata, cattle manure, cassava stems, vermiculite, protected cultivation. PRODUÇÃO DE MUDAS DE BARUZEIRO EM DIFERENTES AMBIENTES PROTEGIDOS E SUBSTRATOS RESUMO:A qualidade da muda é fundamental para implantação de pomares homogêneos. Desta forma, avaliou-se a formação de mudas de baruzeiro (Dipteryx alata Vog), em diferentes substratos, no interior de ambientes protegidos. Foram utilizados substratos com 100% de esterco bovino; 100% de ramas de mandioca; 100% de vermiculita; 50% de esterco bovino + 50% de ramas de mandioca; 50% de esterco bovino + 50% de vermiculita; 50% de ramas de mandioca + 50% de vermiculita e ⅓ de esterco bovino + ⅓ de ramas de mandioca + ⅓ de vermiculita. Estes substratos foram testados em ambientes protegidos: estufa agrícola; telado de tela preta com 50% de sombreamento e o telado de tela termorrefletora aluminizada com 50% de sombreamento. Foi adotado o delineamento experimental inteiramente casualizado, com cinco repetições de quatro plantas cada. Inicialmente, os dados foram submetidos às análises de variâncias individuais dos substratos em cada ambiente de cultivo, realizando em seguida a avaliação dos quadrados médios dos resíduos e a análise conjunta dos ambientes. O melhor substrato para a formação das mudas do baruzeiro foi a vermiculita pura. O substrato com 100% de esterco e o substrato com 33,33% dos materiais estudados podem ser indicados para a formação das mudas. Os telados podem ser indicados para produção de mudas de baruzeiro, pois conferiram vigor às mesmas. PALAVRAS-CHAVE:Dipteryx alata, esterco bovino, ramas de mandioca, vermiculita, cultivo protegido.

Intensive use of Glyphosate has been selected multiple resistant sourgrass biotypes in the areas of intensive agriculture in Brazil. Thus, it is important that viable management alternatives are evaluated for this invasion, which currently is regarded as the main problem of Brazilian agriculture. The study aimed to evaluate strategies for chemical management of sourgrass. Three trials divided according to the weed development stages were performed: PostInitial (up to tillering), Post-Delayed (one to four tillers) and Adult-Plant (adult stage characterized by the beginning of the reproductive phase). The sourgrass seeds were collected from biotypes with evidence of Glyphosate tolerance in the municipality of Rio Brilhante -MS. In each trial were evaluated thirteen treatments and one witness, where the treatments were herbicide mixtures applications with subsequent sequential applications at different dates (7, 10 and 14 days after the first application) and the herbicides application without mixtures. Sourgrass plants are tolerant to Glyphosate and Clethodim herbicides. Formulated mixtures of Paraquat + Diuron and Haloxifop are the most suitable for controlling sourgrass plants derived from seeds, regardless of the control period. Treatments that have the Haloxyfop herbicide in the first application provided better control when compared to the other treatments with mixtures and sequential applications at all stages of applications.

Different type of greenhouse and substrata on pepper productionPepper production has great commercial value for ornamental and food use. This makes it necessary to improve cultivation techniques, such as environmental control and low cost substrata. Therefore, this study aimed to evaluate the emergence parameters and growth of seedlings in tray, as well as plant growth and production in pots of pepper cvs. Tupã Bode Vermelha and Boyra Habanero Vermelha and ornamental pepper cultivars Etna and Pirâmide, in three different types of greenhouse and six types of substrata. Three greenhouses were evaluated: 1) a greenhouse with low-density transparent polyethylene film and reflective aluminized screen under the film; 2) sombrite ® mono black filament with 50% shade; and 3) aluminet ® , reflective aluminized screen. In these environments we tested six substrata a) ½ cattle manure (E) and ½ humus (H); b) ½E and ½ vermiculite (V); c) ½E and ½ cassava's leaves (R); d) ⅓E+⅓H+⅓V; e) ⅓E+⅓H+⅓R and f) ¼E+¼H +¼V+¼R. Since no replication of cultivation was carried out, each environment was considered as one experiment. The use of substrata ½E+½R; ⅓E+⅓H+⅓R and ⅓E+⅓H+⅓V allowed greater stem diameter, plant height and Dickson quality index in seedling stage of cultivars Etna, Pirâmide, Tupã and Boyra. The number of fruit was higher with the use of the substrata ½E+½R and ⅓E+⅓H+⅓V. The most suitable environment for pepper production is the greenhouse for all cultivars, followed by sombrite ® (especially for cultivars Tupã and Boyra) and aluminet ® (Pirâmide).

ABSTRACT:The production of high-quality seedlings is a critical factor for successful implementation of a determined crop in the field. In order to evaluate the production of coffee seedlings, experiments were conducted with different substrates and in different protected environments. Treatments consisted of evaluation of the following substrates: 50% cattle manure + 50% commercial substrate, 50% cattle manure + 50% vermiculite, 50% commercial substrate + 50% vermiculite, 1/3 cattle manure + 1/3 commercial substrate + 1/3 vermiculite, 50% cattle manure + 50% sand, 1/3 sand + 1/3 cattle manure + 1/3 commercial substrate and 50% commercial substrate + 50% sand. These substrates were tested in different protected environments: agricultural greenhouse, mesh screen with 50% shading, aluminized screen with 50% shading, black screen with 30% shading, black screen with 70% shading, nursery with a buriti straw roof and full sunlight. In each environment, the experiments were conducted in a completely randomized design with five replicates of four plants each followed by joint analysis. The substrates containing 50% cattle manure associated with vermiculite or the commercial substrate may be indicated for production of coffee seedlings. Screened environments with 30, 50 and 70% shading resulted in the highest quality seedlings.

The objective of this study was to test container of polyethylene bags and protected environments on the papaya seedlings production, from May to August of 2008, in Aquidauana state of Mato Grosso do Sul (MS), Brazil. Five bags of polyethylene were used: 7.5 cm x 11.5 cm, 205.9 cm³; 8.4 cm x 10.6 cm, 238.1cm³; 10.0 cm x 16.5 cm, 525.2 cm³; 12.0 cm x 12.0 cm, 550.0 cm³ and 15.0 cm x 21.5 cm, 1539.8 cm³. These containers were placed in three protected environments: greenhouse; screened nursery with Sombrite® and screened nursery with Aluminet®. Because there is no replication of growing environment, each one was considered an experiment. For each cultivation environment, it was adopted a completely randomized design with eight replications of two plants each. Initially, data were submitted to analysis of individual variance of the container (for each cultivation environment), then performing the evaluation of the residual mean squares and the combined analysis of these environments for comparison of protected environments. The greenhouse and nursery with thermal reflector screen produced the best seedlings. The bags of 15.0 x 21.5 cm produced the best papaya seedlings. The Dickson Quality Index pointed the nursery with screen of thermal reflector as the environment that produced the most vigorous seedlings, when using the best container.

ABSTRACT:The study aimed to evaluate the control of Conyza bonariensis in delayed post-emergence stage using different spray nozzles and solutions with and without adjuvants; and to verify the occurrence of resistance to glyphosate, determining the dose-response curve. The experimental design was randomized in factorial (6 spray nozzles x 5 spray solution) in twenty repetitions. ® and without herbicide application. The use or not of adjuvants in the spray solution did not differ statistically from the solution containing the herbicide only. The spray nozzles AIXR 11002, TT 11002 and XR 11002 presented best results of control the horseweed from the evaluation of 07 days after application (DAP) and 28 DAP and such spray nozzles maintained the best average of control percentage. The higher dry matter reductions of horseweed were obtained by spray nozzles 110015 XR, TT 11002 and 11002 XR compared with the control. The population evaluated presents biotypes that resist to doses of 2.880 g.ha -1 a.e. of glyphosate. It is concluded that the evaluated biotypes presents tolerance to glyphosate, independent of your association or not with adjuvants.

Because the consumption and use of native fruit, there is need for research on strategies for maintenance propagation of the species. Jatoba is a fruitful tree of great importance to the Brazilian fauna, cuisine and reclamation and thus is essential to obtain high quality seedlings. This study aimed at the formation of Jatoba seedlings on different substrates. The experiment was conducted at Experimental Farm for Teaching, Research and Extension of UNESP, Campus Ilha Solteira, SP, located in Selvíria/MS for the period 13 October 2011 to 11 February. For producing the seedlingsm we used a black screen of polypropylene (Sombrite ®) with 50% light reduction and black plastic bags 15 x 21,5 cm (1.8 L) filed with different substrates: (S1) soil control; (S2) soil (50%) + manure (50%); (S3) soil + mineral fertilizer; (S4) soil (50%) + mineral fertilizer + manure (50%); (S5) soil + limestone; (S6) soil (50%) + limestone + manure (50%); (S7) soil + mineral fertilizer + limestone; (S8) soil (50%) + limestone + manure + mineral fertilizer (50%). Emergence of seeds was evaluated daily and fortnightly and after emergence of seeds were observed height and stem diameter. At 120 days after emergence, we evaluated the length of root system, shoot and root dry mass, total dry mass, shoot/ lap diameter (S/D), relation between shoot and root dry mass (SDM/RDM), relation between shoot and root fresh mass (SFM/RFM), relation between length of shoot/root (LS/LR) and Dickson's Quality Score (DQS). Experimental design was completely randomized in factorial with 8 x 7 reviews substrates. Proceeded with analysis of variance unfolding of significant interactions with the Tukey test for comparisons of means of the substrate factor and time factor for polynomial regression. Treatment pure soil substrate (S1) provided to the Jatoba seedlings the largest biomass formation of shoot and root dry mass. The addition of manure to the substrate did not benefit the development of the Jatoba seedlings.

This study aimed to evaluate genipap seedling formation in different protected environments using different substrates. Five protected cultivation environments (E) were used: E1 - greenhouse without aluminized shade cover under polyethylene film; E2 - greenhouse with aluminized shade cover under polyethylene film; E3 - screened with black shade cover; E4 - screened with aluminized shade cover; and E5 - nursery covered with bacuri coconut straw. In each protected cultivation environment, substrates containing different percentages of earthworm humus (H), vermiculite (V), bovine manure (M) and shredded cassava stems (C) were tested. Seedlings emerged best in environments E2, E3 and E4. Mixtures ¾ H + ¼ V and ¾ H + ¼ C favored growth and yielded high quality seedlings. Environments E3 and E4 provided superior growth, with better- quality and high-quality seedlings. Environments E1 and E5 did not provide adequate seedling growth. Therefore, were not recommended for genipap seedling production using the substrates tested.