scholarly journals EVALUATION OF IRRIGATION LEVELS IN THE CASTOR BEAN (Ricinus communis L.) IN THE BRAZILIAN SEMIARID REGION

2013 ◽  
Vol 21 (5) ◽  
pp. 493-500
Author(s):  
Breno Rosa Neves ◽  
Marcelo Rocha Santos ◽  
Sérgio Luiz Rodrigues Donato
Keyword(s):  
Castor Bean ◽  
Agricultural Sector ◽  
Ricinus Communis ◽  
Raw Material ◽  
Growth And Yield ◽  
Semiarid Region ◽  
Federal Institute ◽  
Randomized Design ◽  
Ricinus Communis L ◽  
Irrigation Levels

There has been an increase in the search for forms of renewable energy with lo environmental impacts, of which biodiesel is highlighted. The castor bean (Ricinus communis L.) is a major raw material for the derivation of these biomass-based fuels. Due to the lack of information in literature regarding irrigation in castor bean crops in the semiarid region of Bahia, the aim of this study was to evaluate different irrigation levels on growth and yield of castor beans in the semiarid region of Bahia. The study was conducted in an experimental area of the agricultural sector of the Federal Institute of Education, Science and Technology Campus, Guanambi, Bahia, Brazil. The experiment was setup in a completely randomized design with 4x5 factorial scheme, consisting of four irrigation levels (T1: 100% ETc, T2: 80% of ETc, T3: 60% of ETc and T4: 40% of ETc, with drip irrigation), five evaluation dates (65, 80, 95, 110 and 126 day after sowing) and four replications. The reduction in irrigation did not cause differences in plant height, stem diameter and crown diameter of the castor bean cultivar Paraguaçu. Irrigation at 80% ETc showed to be more suitable, with increased yield and water use efficiency.

scholarly journals Evaluation of fertilization of hydroponically cultivated castor bean (Ricinus communis L.)

2021 ◽  
Vol 14 (05) ◽  
Author(s):  
Adrián Gómez Gonzalez ◽  
J.G. Reyes-Contreras ◽  
Eduviges Javier García ◽  
I. Hernández-Ríos ◽  
A. Amante-Orozco ◽  
...  
Keyword(s):  
Castor Bean ◽  
Design Methodology ◽  
Oil Content ◽  
Ricinus Communis ◽  
Growth And Yield ◽  
Average Height ◽  
Grain Production ◽  
Hydroponic System ◽  
San Luis ◽  
Ricinus Communis L

Objective: To determine the influence of fertilization on the growth and yield of five accessions of castor bean (Ricinus communis L.) cultivated in a hydroponic system. Design/Methodology/Approach: Five outstanding accessions of the castor bean collection at COLPOS-Campus SLP were established: El Orito (EO), Encarnación de Díaz (ED), Salinas (SA), Ranchería de Guadalupe (RG) and San Luis (SL). The NPK (ppm) fertilization levels tested were: low (LL; 140, 50, 150), medium (ML; 210, 80, 250); high (HL; 280, 110, 350) and a control (NF; No fertilizer). The experimental design was a randomized blocks, with a 5x4 factorial arrangement (accession x fertilizer level). Results: The differences in grain production were only significant (?=0.05) between the NF control (31 g plant-1) and the three levels of fertilization (1103, 973 and 967 g plant-1, for LL, ML, and HL, respectively, with no differences among them). Regarding accessions, no differences were observed among them, having ED the highest yield (681 g plant-1). In the case of plant height, NF treatment reached 60 cm, while the other levels had an average height of 170 cm, with HL being the highest (180 cm). The highest oil content (38.4%) was obtained with the ML fertilization. Study Limitations/Implications: The present study had no obvious limitations. Findings/Conclusions: For seed yield, significant differences were found only between not fertilizing and fertilizing at any level. Between fertilized levels, however, the differences were not significant, as well as among accessions.

scholarly journals Physiological quality of castor seeds (Ricinus communis L.) after processing

2019 ◽  
Vol 41 (2) ◽  
pp. 224-232
Author(s):  
Anailda Angélica Lana Drumond ◽  
Juliana de Fátima Sales ◽  
Jacson Zuchi ◽  
Gessimar Nunes Camelo ◽  
Moara Mariely Vinhais Souza
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Accelerated Aging ◽  
Raw Material ◽  
Processing Unit ◽  
Randomized Design ◽  
Germination Speed ◽  
Physiological Quality ◽  
Castor Seeds

Abstract: Castor bean seeds are the raw material used for extracting oil destined to pharmaceutical and industrial ends. The appropriate application of post-harvest technologies, such as processing, is required to ensure the production of top quality seeds. Thus, this study aimed at assessing the physiological quality of seeds from two castor bean genotypes, classified according to their specific mass and size. Castor seeds of the genotypes EVF102 and EVF103 were mechanically harvested and then classified with the aid of cylindrical sieves and a densimetric table. This procedure was conducted at the processing unit of the company Sementes Goiás LTDA [Goiás Seeds Co.]. Evaluations of seed physiological quality were carried out in the Seed Laboratory of Instituto Federal Goiano, following a completely randomized design. The testing was conducted in four replicates, in a 2 x 2 x 5 factorial scheme (two genotypes x two sizes x five specific masses). The following parameters were appraised: (a) mass of one thousand seeds; (b) germination; (c) germination speed index; (d) emergence test; (e) emergence speed index; (f) electrical conductivity; and (g) accelerated aging. Genotype EVF102 seeds sized 8 mm, as classified by the densimetric table, showed the highest physiological quality, considering the germination, germination speed index, and emergence. Seeds of the genotype EVF103, sorted by size, exhibited no difference in physiological quality.

scholarly journals EFEITOS DE NÍVEIS DE IRRIGAÇÃO, ESTIMADOS A PARTIR DA EVAPORAÇÃO MEDIDA NO TANQUE REDUZIDO, NA CULTURA DA MAMONEIRA

Irriga ◽  
2009 ◽  
Vol 14 (1) ◽  
pp. 76-87
Author(s):  
Thales Vinícius de Araújo Viana ◽  
Jefferson Gonçalves Américo Nobre ◽  
Levi Gonçalves Moreira ◽  
Benito Moreira de Azevedo ◽  
Alan Diniz Lima ◽  
...  
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Irrigation Schedule ◽  
Irrigation Management ◽  
Ricinus Communis L ◽  
Culture Cycle ◽  
Total Productivity ◽  
Irrigation Levels ◽  
Bean Crop ◽  
Made In

EFEITOS DE NÍVEIS DE IRRIGAÇÃO, ESTIMADOS A PARTIR DA EVAPORAÇÃO MEDIDA NO TANQUE REDUZIDO, NA CULTURA DA MAMONEIRA  Thales Vinícius de Araújo Viana; Jefferson Gonçalves Américo Nobre; Levi Gonçalves Moreira; Benito Moreira de Azevedo; Alan Diniz Lima; André Henrique Pinheiro AlbuquerqueDepartamento de Engenharia Agrícola, Universidade Federal do Ceará, Fortaleza, CE, [email protected]  1 RESUMO Com o objetivo de avaliar a produtividade da mamoneira (Ricinus communis L.), variedade IAC Guarani, sob níveis de irrigação, instalou-se um experimento em área da Universidade Federal do Ceará (UFC), no município de Fortaleza (03°44’S, 38°33’W, 19,5 m). A semeadura foi feita em covas, espaçadas de 1,0 x 1,0 m. Durante o ciclo da cultura, as plantas foram irrigadas por gotejamento, diariamente, e as lâminas de irrigação foram quantificadas a partir da evaporação medida em um tanque evaporimétrico reduzido (EVAr; diâmetro, 60 cm; altura, 25 cm). O delineamento experimental foi em blocos ao acaso com cinco tratamentos: 25; 50; 75; 100 e 125% da EVAr, com quatro repetições. Foram avaliadas as variáveis: tamanho do racemo de 1ª ordem, número de frutos por racemo, peso de 100 sementes por racemo, produtividade dos racemos (1ª, 2ª e 3ª ordens) e produtividade total. A utilização de maiores lâminas de irrigação aumentou até um certo valor o peso de 100 sementes por racemos de 2ª e 3ª ordens e a produtividade total, a partir do qual essas variáveis passam a decrescer. O uso do tanque reduzido possibilitou um eficiente manejo de irrigação da mamoneira. UNITERMOS: Ricinus communis L., minitanque, manejo da irrigação.  VIANA, T. V. A.; NOBRE, J. G. A.; MOREIRA, L. G.; AZEVEDO, B. M.; LIMA, A. D.; ALBUQUERQUE, A. H. P. EFFECTS OF IRRIGATION LEVELS, ESTIMATED FROM THE EVAPORATION MEASURED IN REDUCED A TANK, IN A CASTOR BEAN CROP  2 ABSTRACT In order to evaluate the productivity of castor beans (Ricinus communis L.), cultivar IAC Guarani, under  irrigation levels, an experiment was carried out in an  area of the Federal University of Ceará (UFC), in Fortaleza-CE (3°44'S, 38°33'W,19,5 m). The sowing was made in holes, 1.0 x1.0 m spacing. During the culture cycle, the plants were irrigated daily by dripping, and irrigation depths were quantified starting from the evaporation measured by the evaporimeter of a reduced tank (EVAr; 60-cm diameter, 25-cm height). The experimental design had randomized blocks with five treatments: 25; 50; 75; 100 and 125% of EVAr, with four replications. The following variables were analyzed: number of fruits, weight of 100 seeds, productivity of the racemes (1st, 2nd and 3rd orders) and total productivity. The irrigation depths increased the weight of 100 seeds for 2nd and 3rd order racemes and total productivity to a certain value, and then these variable values started to decrease. The use of a reduced tank in the irrigation management of the castor bean crop was efficient. KEY WORDS: Ricinus communis L., minitank, irrigation schedule

scholarly journals Life history of Neoseiulus californicus (McGregor, 1954) (Acari: Phytoseiidae) fed with castor bean (Ricinus communisL.) pollen in laboratory conditions

2014 ◽  
Vol 74 (3) ◽  
pp. 691-697 ◽  
Author(s):  
PP Marafeli ◽  
PR Reis ◽  
EC. da Silveira ◽  
GC Souza-Pimentel ◽  
MA. de Toledo
Keyword(s):  
Life History ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Intrinsic Rate ◽  
Predatory Mite ◽  
Neoseiulus Californicus ◽  
Intrinsic Rate Of Increase ◽  
Ricinus Communis L ◽  
Rate Of Increase ◽  
History Of

The predatory mite, Neoseiulus californicus(McGregor, 1954) (Acari: Phytoseiidae) is one of the principal natural enemies of tetranychid mites in several countries, promoting efficient control of those mites in several food and ornamental crops. Pest attacks such as that of the spider mite, Tetranychus urticaeKoch, 1836 (Acari: Tetranychidae), is one of the problems faced by farmers, especially in the greenhouse, due to the difficulty of its control with the use of chemicals because of the development of fast resistance making it hard to control it. The objective of this work was to study the life history of the predatory mite N. californicus as a contribution to its mass laboratory rearing, having castor bean plant [Ricinus communis L. (Euphorbiaceae)] pollen as food, for its subsequent use as a natural enemy of T. urticae on a cultivation of greenhouse rosebushes. The studies were carried out in the laboratory, at 25 ± 2°C of temperature, 70 ± 10% RH and a 14 hour photophase. The biological aspects and the fertility life table were appraised. Longevity of 32.9 days was verified for adult females and 40.4 days for males. The intrinsic rate of increase (rm) was 0.2 and the mean generation time (T) was 17.2 days. The population doubled every 4.1 days. The results obtained were similar to those in which the predatory mite N. californicus fed on T. urticae.

scholarly journals Efecto de Corythucha gossypii sobre las hojas de higuerilla: criterios para su muestreo y control con insecticidas

2010 ◽  
Vol 11 (1) ◽  
pp. 41 ◽  
Author(s):  
Edgar Herney Varón ◽  
Márcio Dionizio Moreira ◽  
Jenny Paola Corredor
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Insect Pest ◽  
Lower Surface ◽  
Insecticide Application ◽  
Lace Bug ◽  
Life Period ◽  
Ricinus Communis L ◽  
Oil Plant ◽  
And Control

<p>El chinche de encaje, Corythucha gossypii (Fabricius) (Hemiptera: Tingidae), es un insecto plaga del algodón, pero ha sido reportado en más de veinticuatro hospederos, incluyendo higuerilla (Ricinus communis L). El objetivo de este trabajo fue evaluar si esta plaga disminuye el periodo de vida útil de las hojas, establecer la superficie de muestreo de la hoja que mejor representa las poblaciones de esta plaga y la eficacia de seis insecticidas para su control en higuerilla. La vida útil de las hojas fue negativamente influenciada por la presencia del insecto plaga; a mayor número inicial de insectos, menor fue el tiempo para la pérdida de hojas. La superficie del envés fue la que mejor representó la población de C. gossypii con un promedio ± Error Standard (ES) de 55,10 ± 4,76 de individuos y una correlación con la población total de 99,60%, R2 =0,99 y p &lt; 0,0001; comparado con 3,44 ± 0,57 individuos y una correlación de 66,32%; R2=0,44 y p &lt; 0,0001 para la superficie del haz. El orden de eficacia de control para 3 días después de la aplicación de los tratamientos fue tiametoxam + lambdacihalotrina (0,00%), spinetoram, (0,00%), malation (20,35%), tiametoxam (38,62%), dimetoato (86,94%) e imidacloprid (87,33%); para 7 días fue tiametoxam + lambdacihalotrina (0,00%), spinetoram (21,46%), malation (38,77), tiametoxam (50,84%), dimetoato (86,14%) e imidacloprid (90,37%). Los datos de muestreo, a partir de 16 días, presentaron una gran pérdida de unidades experimentales, lo que imposibilitó el análisis de los resultados, después de ese tiempo.</p><p> </p><p><strong>Effect of Corythucha gossypii on Castor Oil Plant Leaves: Sampling Criteria and Control by Insecticides</strong></p><p>The lace bug, also called the “cotton or bean lace bug”, Corythucha gossypii (Fabricius) (Hemiptera: Tingidae) is a common pest from cotton. However it has been reported in another twenty four plant hosts including castor bean (Ricinus communis L.). This work aimed to establish if this insect pest can reduce the life-period of leaves, to assess which is the leaf surface that best represents the total pest population for sampling and to test the efficacy of six insecticides for C. gossypii control in a castor bean crop. The life-period of leaves was negatively affected by the presence of the insect, the larger the number of C. gossypii, the shorter their leaf life. The lower surface best represented the entire population of lace bug with a mean ± standard error of 55.10 ± 4.76, with a 99.60% of correlation, a R2=0.99 and a p &lt; 0.0001; compared to 3.44 ± 0.57, with a 66.32% of correlation, a R2=0.44 and a p &lt; 0.0001 for the upper surface. Efficacy of control after three days of insecticide application was: thiamethoxam + lambdacyhalothrin (0.00%), spinetoram, (0.00%), malathion (20.35%), thiamethoxam (38.62%), dimethoate (86.94%) and imidacloprid (87.33%). After seven days of insecticide application the efficacy was thiamethoxam + lambdacyhalothrin (0.00%), spinetoram (21.46%), malathion (38.77), thiamethoxam (50.84%), dimethoate (86.14%) and imidacloprid (90.37%). Results obtained after 16 days lacked many sampling unit leaves, which made their analysis meaningless, after that period of time. </p>

scholarly journals Germination and initial development of canola and radish submitted to castor leaves aqueous extracts

2016 ◽  
Vol 7 (1) ◽  
pp. 104
Author(s):  
Carlos Alberto Gonsiorkiewicz Rigon ◽  
Adriana Tourinho Salamoni ◽  
Luan Cutti ◽  
Adalin Cezar Morais de Aguiar
Keyword(s):  
Seed Germination ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Initial Growth ◽  
Aqueous Extracts ◽  
Brassica Napus L ◽  
Initial Development ◽  
Allelopathic Potential ◽  
Ricinus Communis L ◽  
Radish Seed

This study aimed to evaluate the allelopathic activity of aqueous extracts of castor bean (Ricinus communis L.) leaves on germination and initial growth of canola (Brassica napus L.) and radish (Raphanus sativus L.) seedlings. Two experiments were conducted, usingcanola seeds for the first, which was installed in a 2x7 factorial scheme (with two photoperiods – dark and light and seven extracts concentrations - 0, 1, 2, 4, 8, 16 and 32%). The second experiment consisted of an evaluation of radish seed germination submitted to seven concentrations of the extracts in the dark photoperiod. The germination of the canola seeds was reduced in the dark, and the use of extracts at concentrations of 16% and 32%inhibited seeds germination for both studied photoperiods. The radish seed germination was completely inhibited when the concentration of 32% was used, however, at the concentrations of 4, 8 and 16% a reduction on rootand hypocoyl development of the seedlings were observed, affirming the high allelopathic potential of castor bean aqueous extracts on canola and radish.

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