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.

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 Phytoremediation Potential of Castor Bean (Ricinus Communis L.)

2020 ◽  
Vol 4 (9) ◽  
pp. 63-72
Author(s):  
Violina Angelova ◽  
Mariana Perifanova Nemska
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Ricinus Communis L

scholarly journals Strip-till technology - a method for uniformity in the emergence and plant growth of winter rapeseed (Brassica napus L.) in different environmental conditions of Northern Poland

2018 ◽  
pp. 194-199 ◽  
Author(s):  
Iwona Jaskulska ◽  
Lech Gałęzewski ◽  
Mariusz Piekarczyk ◽  
Dariusz Jaskulski
Keyword(s):  
Plant Growth ◽  
Environmental Conditions ◽  
Block Design ◽  
Thermal Conditions ◽  
Weather Conditions ◽  
Field Trials ◽  
Initial Growth ◽  
Brassica Napus L ◽  
Initial Development ◽  
Winter Rapeseed

The emergence of plants is especially important for the winter crops that are grown in the challenging environmental conditions of many countries in Central and Eastern Europe. The emergence and initial growth of winter rapeseed were compared in field trials in a randomized block design with three replicates for plants sown in conventional tillage systems (CT) and strip-till (ST), which had different weather conditions and on soil with a non-uniform texture over a period of two years. Sowing in the CT was carried out using Horsch Pronto 4DC (Germany) at a row distance of 0.29 m. The ST operations were performed using a Pro-Til 4T drill manufactured by Mzuri Limited (Great Britain) - row spacing of 0.36 m. In favourable rainfall and thermal conditions, the density of winter rapeseed plants two weeks after sowing was found to be higher if it was sown after the CT than in the ST system. In the year that had a serious shortage of rainfall during the sowing period, a considerably higher density of plants was achieved using the ST system. The uniformity of plant growth using the ST technology in soil with a varied texture, especially in a year with an unfavourable distribution of rainfall, was proven by less variability in the number of leaves in the rosette, in the dry mass of the leaf rosette and in the root neck thickness of the winter rapeseed than in the CT system. The ST system can create good conditions for the initial development and preparation of rapeseed plants for wintering.

A simple thermal-detoxified method for castor bean (Ricinus communis L.) cake, and its potential nutraceutical properties

2021 ◽  
Vol 174 ◽  
pp. 114151
Author(s):  
Mayra Denise Herrera ◽  
Rafael Jiménez-Ocampo ◽  
Rigoberto Rosales-Serna ◽  
Jorge Alberto Rodríguez-González ◽  
Juan Luis Santos-De la Cruz ◽  
...  
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Ricinus Communis L ◽  
Nutraceutical Properties

scholarly journals Character selection by path and principal analysis for enhanced seed size and yield in local castor bean (Ricinus communis L.)

2019 ◽  
Vol 391 ◽  
pp. 012062
Author(s):  
Budi Waluyo ◽  
Puji Shandila ◽  
Chindy Ulima Zanetta ◽  
Darmawan Saptadi ◽  
Noer Rahmi Ardiarini ◽  
...  
Keyword(s):  
Seed Size ◽  
Castor Bean ◽  
Ricinus Communis ◽  
Ricinus Communis L ◽  
Principal Analysis
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