Weed population dynamics in rice crops resulting from post-emergent herbicide applications

González-Ramírez, Javier; Hoyos, Verónica; Plaza, Guido

doi:10.15446/rfna.v70n1.61762

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…Similarly, the dominance of Anagalis is followed by Vicia sativa and then Chenopodium album in the given ecosystem. Similar method was followed by (Ramfrez, Hoyos, & Plaza, 2017) to record the IVI of weed species.…”

Section: Importance Value Index (Ivi)mentioning

confidence: 99%

Diversity of Weeds and Population Dynamics of Predators and Prey Present in Wheat-Mustard Ecosystem at Paklihawa, Rupandehi, Nepal

Khanal¹,

Adhikari²,

Bhattarai³

et al. 2018

J. Inst. Agric. Anim. Sci.

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A study was conducted at Institute of Agriculture and Animal Science (IAAS), Paklihawa Rupandehi, agronomy field to study the diversity of weeds and population dynamics of predators and prey in wheat-mustard ecosystem. The study was conducted by quadrate sampling method using the wooden frame by selecting 40 sample spots, and locating its coordinates. Predator, prey, some of the beneficial and harmful insects as well as weed species was recorded in 5 days interval in the study. Relationships between the population of the mustard aphid and wheat aphid, lady bird beetle to maximum and minimum temperature were recorded in order to know the effect of temperature in relation to population density. Number of mustard aphid and its nymph has shown the positive significant relationship with the population of the spider in the wheat mustard ecosystem. Shannon Weiner Index value was calculated and the species richness was found to be 2.63 with the effective number of species value 9. The species evenness value was found to be 0.83 in the studied ecosystem which signifies that the given weed ecosystem is somewhat even. The importance value index (IVI) of the given ecosystem with the value of different weed species was calculated and it was found that the weed Anagalis arvensis was ranked as first with the IVI value of 57.98 following Vicia sativa and Chenopodium album. This signifies that the species Anagalis arvensis has greater control over the wheat mustard ecosystem of Paklihawa, Rupandehi.

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Section: Importance Value Index (Ivi)mentioning

confidence: 99%

Diversity of Weeds and Population Dynamics of Predators and Prey Present in Wheat-Mustard Ecosystem at Paklihawa, Rupandehi, Nepal

Khanal¹,

Adhikari²,

Bhattarai³

et al. 2018

J. Inst. Agric. Anim. Sci.

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“…Pathogens Insect-pests Weeds 2016), hyperparasite and coinfection effect on population dynamics of pathogen (Tollenaere et al, 2014;Susi et al, 2015) al., 2018); aphids (Guo et al, 2017b) Pramual et al, 2011Ramírez et al, 2017) Molecular mechanisms plants Resistance or defence to pests Metabolomics of the plant defence (Mhlongo et al, 2018), molecular mechanisms of resistance (Avila Mendez and Romero, 2017;Sahni et al, 2018; response of RNAs (Islam et al, 2018) Molecular Bases of Plant defence against insects (Smith and Clemens, 2012;War et al, 2012;Barah and Bones. 2015;Belete, 2018) Molecular mechanisms of plant competition (Pierik et al, 2013), resistance to striga (Bardaro et al, 2016), Allelopathic mechanisms (Cheng and Cheng, 2015;Trezzi et al, 2016;Ashraf et al, 2017) Molecular mechanisms of pests resistance to pesticides Gene duplication mechanism (Jugulam and Gill 2018); reversing resistance (Allen et al, 2017) Molecular genetics of insecticide resistance (IR) (Ffrench-Constant, 2013); Molecular detection of IR (Javed et al, 2017) Molecular mechanisms of herbicide resistance HR (Delye et al, 2015;Alebrahim et al, 2017 ), Gene duplication mechanism (Koo et al, 2018) Molecular studies on Climate Change (CC) adaptation and mitigation strategies as related to pest management Impacts of CC on plant diseases and implications on management (Dukes et al, 2009;Shaw 2009;Chakraborty and Newton, 2011;Pautasso et al, 2012;Juroszek and von Tiedemann, 2013; Impacts of CC on insectpests and implications on management…”

Section: Characteristicmentioning

confidence: 99%

Applications of Biotechnology for Characterization of Plants and Pests as the Key Components of Plant Protection and Production Strategies: A Review

Alemu

2020

Int J Appl Sci Biotechnol

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The second Sustainable Developmental Goals (SDG), among the seventeen SDG, is concerned with the pursuit of global food security and agricultural sustainability, which become the key to the success of the entire SDG. Whereas agricultural production and productivity are heavily threatened by the incidence of pests that inflict huge losses in various forms. This calls for prompt applications of biotechnology for the fast, accurate and reliable means for characterization of plant generic resources and pests as it is the pre-requisite and gateway for designing appropriate plant protection and production strategies. It is imperative that pests be identified properly so that judicious use of the literature can be made and sustainable management strategies can be implemented at the right stage. To this end, the application of biotechnology has made significant advances for reliable characterization of plant genetic resources as well as accurate diagnosis of pests, study of their genetic diversity and variability, detailed mechanisms of their transmission and evolutionary relationships. Accordingly, this review article covers the comprehensive account of the various molecular techniques, genome mapping and OMICS sciences utilized for characterization plants and pests that ultimately allow the detailed study of the biology and epidemiology of pests at any stage of their life cycle. The resulting data are eventually employed for enhancing successful implementation of sustainable plant protection and production strategies. In conclusion, the increasing projections of transboundary pests, environmental and abiotic factors together with the continuous scientific advancements and breakthroughs have made biotechnology to be an important engine of bioeconomy for generating invaluable products, processes and services. Int. J. Appl. Sci. Biotechnol. Vol 8(3): 247-288

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Indicadores Fisicoquímicos del suelo con Manejo Convencional Del Arroz (Oriza sativa L.) Bajo Riego

Rofner¹,

Becerril²,

Rojas³

2022

lgr

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La investigación evaluó el efecto del manejo convencional del arroz bajo riego en indicadores fisicoquímicos del suelo, en los fundos Mercedes y Pérez, en Yurimaguas, Perú. Es una investigación no experimental comparativa, con ajuste estadístico de diseño completamente aleatorizado, donde los tratamientos lo constituyen el bosque secundario (BS), el manejo convencional del arroz de: uno (A1), cinco (A5) y nueve años (A9); evaluándose indicadores fisicoquímicos del suelo en estratos de 0,0 a 0,2 y 0,2 a 0,4 m. Los resultados mostraron diferencias en las fracciones, con reducción inicial de arena, limo e incremento de arcilla y en el tiempo ligera recuperación de la fracción arena, limo y reducción de arcilla. Los indicadores químicos según tratamientos y estratos presentan diferencias, excepto el potasio (K); el manejo afecta significativamente al inicio del proceso productivo (A1) reduciendo los niveles del potencial de hidrogeno (pH), materia orgánica (MO), nitrógeno (N), fosforo (P), potasio (K+), calcio (Ca2+) y magnesio (Mg2+) e incrementando el aluminio (Al3+), acidez cambiable (AC) y saturación de aluminio (SAl); de igual forma, se observa la recuperación en el tiempo (A9), excepto en MO y N que descienden a niveles muy bajos. En conclusión, el manejo convencional muestra efectos significativos entre tratamientos e indicadores evaluados en ambos estratos, afectando negativamente al inicio (A1) y recuperándose con el tiempo (A9); sin embargo, se observan efectos negativos a largo plazo en los niveles de MO y N.

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Weed population dynamics in rice crops resulting from post-emergent herbicide applications

Cited by 3 publications

References 30 publications

Diversity of Weeds and Population Dynamics of Predators and Prey Present in Wheat-Mustard Ecosystem at Paklihawa, Rupandehi, Nepal

Diversity of Weeds and Population Dynamics of Predators and Prey Present in Wheat-Mustard Ecosystem at Paklihawa, Rupandehi, Nepal

Applications of Biotechnology for Characterization of Plants and Pests as the Key Components of Plant Protection and Production Strategies: A Review

Indicadores Fisicoquímicos del suelo con Manejo Convencional Del Arroz (Oriza sativa L.) Bajo Riego

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