scholarly journals Distribución y densidad de Rottboellia cochinchinensis (Lour.) Clayton en el estado de Morelos

2019 ◽  
Vol 10 (7) ◽  
pp. 1693-1697
Author(s):  
Cid Aguilar Carpio ◽  
Leobardo Diaz Corro ◽  
Juan Carlos Beltran Mondoza ◽  
Gaudencio Millan Medina ◽  
Irving Horacio Campos Aguilar
Keyword(s):  
Rottboellia Cochinchinensis

En México, se puede observar un incremento en la introducción y diseminación de malezas cuarentenadas, las cuales, pueden causar daños económicos millonarios a la agricultura, por requerir medidas nuevas de combate en los cultivos. El objetivo del estudio fue determinar la distribución y densidad poblacional de Rottboellia cochinchinensis (zacate peludo) en el estado de Morelos y así conocer la época de mayor propagación con referencias a las condiciones ambientales y con ello evaluar el momento más oportuno para controlar o erradicar al zacate peludo, antes de que se pueda reproducir. El estudio se realizó del 01 de enero al 31 de diciembre de 2015, en las zonas agrícolas de los 33 municipios del estado de Morelos, donde fueron muestreados para identificar la presencia de R. cochinchinensis. Una vez identificada la existencia del zacate peludo en los municipios, cada mes se dio seguimiento a los municipios con presencia para conocer la densidad poblacional. Los municipios con la población más densa fueron Jantetelco, Jonacatepec, Tepalcingo y Xochitepec. La densidad de población más alta se presentó en los meses de julio y agosto después de observarse la mayor precipitación, por lo que es importante aplicar técnica de control sobre Rottboellia cochinchinensis antes del periodo mencionado entre los meses de mayo y junio.

Mutual Effects of Rottboellia cochinchinensis and Maize Grown Together at Different Densities

2013 ◽  
Vol 105 (6) ◽  
pp. 1545-1554 ◽  
Author(s):  
Silvia M. Contreras‐Ramos ◽  
Jacobo Rodriguez‐Campos ◽  
Aurora Saucedo‐García ◽  
Rocio Cruz‐Ortega ◽  
Martha L. Macías‐Rubalcava ◽  
...  
Keyword(s):  
Rottboellia Cochinchinensis

scholarly journals First record of the invasive species Rottboellia cochinchinensis (Poaceae, Andropogoneae) in the South Region of Brazil

Check List ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 1930
Author(s):  
Luís Adriano Funez ◽  
João Paulo Ramos Ferreira ◽  
Gustavo Hassemer ◽  
Rafael Trevisan
Keyword(s):  
Invasive Species ◽  
First Record ◽  
The South ◽  
Rottboellia Cochinchinensis

scholarly journals 3-O-Acetyl-narcissidine, a Bioactive Alkaloid from Hippeastrum puniceum Lam. (Amaryllidaceae)

2008 ◽  
Vol 63 (9-10) ◽  
pp. 639-643 ◽  
Author(s):  
Omar Santana ◽  
Matías Reina ◽  
Ana Luisa Anaya ◽  
Fidel Hernández ◽  
M. Elena Izquierdo ◽  
...  
Keyword(s):  
Leptinotarsa Decemlineata ◽  
Chemical Structure ◽  
Spectroscopic Analysis ◽  
Biological Activities ◽  
Protective Role ◽  
Panicum Maximum ◽  
Amaranthus Hypochondriacus ◽  
Plant Defensive Compounds ◽  
Polyphagous Insect ◽  
Rottboellia Cochinchinensis

In the context of the study on plant defensive compounds we have isolated the main alkaloid from Hippeastrum puniceum (Amaryllidaceae), 3-O-acetyl-narcissidine (1), and its biological activities tested against two divergent insect species and several plant species. 1 was isolated from the bioactive alkaloidal fraction of H. puniceum. Its chemical structure was established by spectroscopic analysis. The biological activity tests showed that 1 is an antifeedant against the polyphagous insect Spodoptera littoralis but not against the olyphage Leptinotarsa decemlineata. Furthermore, the root growth of Amaranthus hypochondriacus, Rottboellia cochinchinensis, Panicum maximum and Solanum lycopersicum was significantly affected by 1. These results suggest a plant protective role for H. puniceum alkaloids.

Fungal Pathogen of Rottboellia cochinchinensis and its Potential as Bioherbicide

2006 ◽  
Vol 6 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Jugah B. Kadir ◽  
A. Ahmad ◽  
M. Sariah ◽  
A.S. Juraimi
Keyword(s):  
Fungal Pathogen ◽  
Rottboellia Cochinchinensis

scholarly journals Molecular Basis for Resistance to Fluazifop-P-Butyl in Itchgrass (Rottboellia cochinchinensis) from Costa Rica

2016 ◽  
Vol 34 (1) ◽  
pp. 143-150 ◽  
Author(s):  
R. CASTILLO-MATAMOROS ◽  
A. BRENES-ANGULO ◽  
F. HERRERA-MURILLO ◽  
L. GÓMEZ ALPÍZAR.
Keyword(s):  
Costa Rica ◽  
Molecular Basis ◽  
Pcr Amplification ◽  
Costa Rican ◽  
Acetyl Coa Carboxylase ◽  
Annual Grass ◽  
San Jose ◽  
Weed Species ◽  
Rottboellia Cochinchinensis ◽  
Grass Weed

Rottboellia cochinchinensis is an annual grass weed species known as itchgrass, or "caminadora" in America´s Spanish speaking countries, and has become a major and troublesome weed in several crops. The application of fluazifop-P-butyl at recommended rates (125 g a.i. ha-1) was observed to be failing to control itchgrass in a field in San José, Upala county, Alajuela province, Costa Rica. Plants from the putative resistant R. cochinchinensis population survived fluazifop-P-butyl when treated with 250 g a.i. ha-1 (2X label rate) at the three- to four-leaf stage under greenhouse conditions. PCR amplification and sequencing of partial carboxyl transferase domain (CT) of the acetyl-CoA carboxylase (ACCase) gene were used to determine the molecular mechanism of resistance. A single non-synonymous point mutation from TGG (susceptible plants) to TGC (putative resistant plants) that leads to a Trp-2027-Cys substitution was found. This Trp-2027-Cys mutation is known to confer resistance to all aryloxyphenoxyproprionate (APP) herbicides to which fluazifop-P-butyl belongs. To the best of our knowledge, this is the first report of fluazifop-P-butyl resistance and a mutation at position 2027 for a Costa Rican R. cochinchinensis population.

scholarly journals Aspectos germinativos de capim-camalote (Rottboellia cochinchinensis)

2009 ◽  
Vol 27 (2) ◽  
pp. 273-281 ◽  
Author(s):  
C.E.B. Silva ◽  
M.C. Parreira ◽  
P.L.C.A. Alves ◽  
M.C.M.D. Pavani
Keyword(s):  
Rottboellia Cochinchinensis

O capim-camalote (Rottboellia cochinchinensis), originário da Índia, é encontrado em várias regiões do mundo, sendo uma espécie temida pelos agricultores devido ao seu difícil controle e avanço crescente. Objetivou-se com este trabalho estudar os fatores que afetam a germinação das sementes dessa espécie. Foram avaliados os métodos de superação de dormência: 1 - escarificação mecânica, 2 - escarificação química, 3 - tratamento pré-semeadura, 4 - tratamento químico, 5 - tratamento hormonal e 6 - sementes não tratadas. Foram estudados os efeitos da temperatura (5, 10, 15, 20, 25, 30, 35 e 40 ºC), do fotoperíodo (6, 8, 10, 12, 14 e 16 horas de luz), da qualidade da luz incidente (branca, vermelha, vermelha distante, amarela, verde, azul e ausência de luz), da disponibilidade de água (0,0, -0,2, -0,3, -0,4, -0,5, -0,6, -1,2 e -2,4 MPa) e da viabilidade de suas sementes quando armazenadas sob condições de câmara fria e seca e sob condições naturais. Todos os ensaios foram conduzidos por 30 dias em câmara de germinação, com os tratamentos arranjados em delineamento experimental inteiramente casualizado, em quatro repetições. Verificou-se que as sementes apresentaram elevado índice de germinação, praticamente não apresentaram dormência e não se mostraram fotoblásticas. A disponibilidade de água foi indispensável para a germinação, com temperatura ideal de 25 °C. As sementes recém-coletadas são inviáveis para o estudo da germinação, apresentando redução na germinação quando armazenadas sob condição de câmara fria e seca.

Growth Response of Itchgrass (Rottboellia cochinchinensis) to Water Stress

Weed Science ◽  
2013 ◽  
Vol 61 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Bhagirath S. Chauhan
Keyword(s):  
Water Stress ◽  
Seed Production ◽  
Aboveground Biomass ◽  
Growth Response ◽  
Weight Ratio ◽  
Field Capacity ◽  
Irrigation Regime ◽  
Weed Plants ◽  
Rottboellia Cochinchinensis ◽  
Number Of Seeds

Greenhouse studies were conducted to evaluate the growth response of itchgrass to water stress. Itchgrass plants produced the greatest aboveground biomass and seeds at 75% of field capacity and these parameters at 50 and 100% of field capacity were similar. With further increase in water stress, seed production was sharply reduced, but itchgrass was still able to produce an average of 63 and 9 seeds plant−1at 25 and 12.5% of field capacity, respectively. Itchgrass plants responded to increasing water stress with increased leaf weight ratio; it was 2.5 times greater at 12.5% of field capacity than at 100% of field capacity. In another study, compared with daily irrigation, intervals of 9 d between irrigations reduced aboveground biomass of itchgrass by 27% and 12-d intervals reduced aboveground biomass by 67%. Compared with the daily irrigation regime, itchgrass seed production was reduced by 61% at intervals of 12 d between irrigations; however, the weed plants produced a considerable number of seeds (153 seeds plant−1) at the 12-d intervals. The ability of itchgrass to produce biomass and seeds under water stressed conditions necessitates strategies that minimize weed survival while maximizing irrigation efficiency for the crop at the same time.

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