Response of Eleusine indica to herbicides and N fertilizer in dry seeded rice

Mohtarrudin, Norhafizah; Gunavathy, S; Chuah, Tse Seng; Norsyafiqa, S; Nuradiba, N I; Farahatul, A A Nur

doi:10.5897/ajar2017.12418

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…In our study, the optimum rate of c to fully suppress the shoot growth of E. indica was 2.5 kg ai/ha (Fig. 4 ) whilst the early post-emergence study of rice herbicide, propanil combined with thiobencarb at 3.6 kg ai/ha conducted by Norhafizah et al 29 was found to decrease the shoot fresh weight of E. indica greater than 90%. Although diuron fully inhibited the shoot growth of O. verticillata at the beginning first week of all treatments, the seedlings treated by compound c was still able to grow (data not shown).…”

Section: Discussionmentioning

confidence: 46%

Herbicidal properties of antihypertensive drugs: calcium channel blockers

Abdullah

Chia

Omar

et al. 2021

Sci Rep

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Herbicide resistance is a worldwide problem in weed control. This prompts researchers to look for new modes of action to slow down the evolution of herbicide-resistant weeds. This research aims to determine the herbicidal action of thiazolo[3,2-a]pyrimidines derivatives, which are well known as antihypertensive drugs. The phytotoxic effects of ten compounds were investigated using leaf disc discoloration test and seed germination bioassay. At concentrations of 125 to 250 mg/L, the 5-(3-Fluoro-phenyl)-7-methyl-5H-thiazolo[3,2-a]pyrimidine-6-carboxylic acid ethyl ester (c) was highly active against Oldenlandia verticillata and Eleusine indica. At application rates of 1.25 to 2.5 kg ai/ha, formulated c demonstrated selective post-emergence and pre-emergence herbicidal activity against O. verticillata, E. indica and Cyperus iria. In the crop tolerance test, formulated c outperformed the commercial herbicide diuron, with aerobic Oryza sativa being the most tolerant, followed by Zea mays, and Brassica rapa. The addition of calcium chloride partially nullified compound c's inhibitory effects on weed shoot growth, indicating that it has potential as a calcium channel blocker. Compound c acted by triggering electrolyte leakage without affecting photosystem II. These findings imply that c could be explored further as a template for developing new herbicides with novel modes of action.

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Section: Discussionmentioning

confidence: 46%

Herbicidal properties of antihypertensive drugs: calcium channel blockers

Abdullah

Chia

Omar

et al. 2021

Sci Rep

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“…Weeds are capable of absorbing nutrients faster and in relatively bigger amounts than crop plants (Blackshaw, 2005), and in the presence of a high weed population density, fertilizer application may stimulate weed growth greatly over the crop growth (Mahajan et al, 2009). In contrast, previous study found that the addition of N fertilizer reduces the weed emergence in aerobic rice system where the soil N level was altered (Norhafizah et al, 2017). In addition, Singh et al (2014) has stated that increased nitrogen rate more than 180 kg ha -1 decreases the weed density of grasses, sedges and broadleaf.…”

Section: Introductionmentioning

confidence: 75%

“…Soil N level may alter the weed community structure which specifies the failure of herbicide alone to control the respective weeds (Cathcart et al, 2004). Norhafizah et al (2017) stated that application of N fertiliser at an application rate of 50, 100 and 150 kg ha -1 influences the soil environment and improve herbicide efficacy to suppress the emergence and shoot fresh weight of E. indica. Irrespective of fertiliser, the present study found that the emergence and shoot fresh weight of E. indica decreases with increasing N rate.…”

Section: Effect Of N Fertiliser On Weed Growthmentioning

confidence: 99%

Effect of N fertilizer on the emergence and seedling growth of Eleusine indica in aerobic rice systems

Selvarajh¹,

Zain²,

Seng³

2017

Plant Omics

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Weed has become one of the most serious problems in aerobic rice systems. Weed management in aerobic rice system needs a manipulation of optimum N fertilizer application to control the weed and simultaneously enhance aerobic rice growth performance. In this study, three types of N sources (urea, ammonium sulphate and ammonium nitrate) with concentration starting from (0, 60, 120, 180 and 240 kg ha -1 ) were evaluated for effective control of the bioassay species, Eleusine indica, while observing the rice injury level. The data on weed (emergence and shoot fresh weight), while rice growth (root length, shoot fresh weight, shoot height and leaf greenness) was collected in this study. It was found that urea at a higher application rate of 240 kg ha -1 strongly inhibit the emergence and shoot growth of E. indica by >78%. Conversely, ammonium sulphate and ammonium nitrate gave moderate inhibition (58-65% inhibition) on weed emergence and shoot growth at higher application rates of 240 kg ha -1 , respectively. Significant stimulation effect on rice root growth, shoot height, shoot fresh weight and leaf greenness was noticed at a low application rate of 60 kg ha -1 urea, while ammonium sulphate and ammonium nitrate only exerts its stimulation effect starting at 120 kg ha -1 . Stimulation effect on the rice growth was likely negligible at 0 and 4 DAS across urea, ammonium sulphate and ammonium nitrate application rates. However, the rice plants growth increases with increasing growth stage. The finding suggest that application of urea at 240 kg ha -1 starting from 8 DAS of rice growth stage was the most efficient application rate in inhibiting E. indica with the stimulation effect on the growth of rice seedlings.

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Response of Eleusine indica to herbicides and N fertilizer in dry seeded rice

Cited by 2 publications

References 12 publications

Herbicidal properties of antihypertensive drugs: calcium channel blockers

Herbicidal properties of antihypertensive drugs: calcium channel blockers

Effect of N fertilizer on the emergence and seedling growth of Eleusine indica in aerobic rice systems

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