Rice Yield Loss and Economic Threshold Levels by Densities of Scirpus planiculmis and Lindernia dubia in Wet-Seeded Rice Paddy Fields

Kwon, Oh-Do; An, Kyu-Nam; Lee, Yeen; Shin, Sera; Park, Heung-Gyu; Shin, Hae-Ryoung; Moon, Byeong-Cheol; Kuk, Yong In

doi:10.5660/kjws.2011.31.4.348

Cited by 4 publications

(3 citation statements)

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“…A decrease of 51-64% in yield of DSR was recorded when 100-200 plants m -2 of the weed were maintained (Sultana, 2000). Kwon, Moon, Kuk, Kim, and Kim (2006) also noticed a rice yield decrease of 11 to 74% and 1 to 12% because of 5 to 100 plants m -2 of E. crus-galli and M. vaginalis in the DSR, respectively. Abdullah Al Mamun (2014) calculated the ETL (economic threshold level) of multi-weed species as 4.72-9.17 plants m -2 which influenced yield deciding attributes of DSR like the number of panicles (m -2 ), number of grains panicle -1 , and 1000-grain weight because of weed-crop competition.…”

Section: Economic Yield (Kg Ha -1 ) and Yield Losses Estimationmentioning

confidence: 81%

Estimation of the economic threshold of Leptochloa chinensis (Chinese sprangletop) in direct-seeded fine grain rice (Oryza sativa)

et al. 2023

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: Leptochloa chinensis (L.) Nees (Chinese sprangletop) is a weed that is becoming a serious threat in upland and lowland rice. A field study was conducted at the Agronomic Research Farm, University of Sargodha, Punjab, Pakistan, during the summer seasons of 2018 and 2019 to evaluate the effect of L. chinensis density on the yield of direct-seeded fine rice. Treatments comprised of L. chinensis densities of 0, 5, 10, 15, 20 and 25 plants m-2, and the experiment was laid out in a randomized complete block design with four replications of each treatment. The results suggest that the presence of L. chinensis significantly hampered the grain yield of direct-seeded rice. Weed infestation caused 63% and 69% yield losses where 25 L. chinensis plants m-2 were sustained in 2018 and 2019, respectively. Yield reduction was due to the reduction in 1000-grain weight (22.9 and 29.1%), number of tillers m-2 (65.8 and 60.0%), and number of grains panicle-1 (53.3 and 60%) in 2018 and 2019, respectively. The highest weed infestation (25 plants m-2) produced the highest weed dry biomass (687 and 669 g m-2), N uptake (19.3 and 19.3 kg ha-1), P uptake (1.92 and 2.32 kg ha-1), and K uptake (20.53 and 20.27 kg ha-1) in 2018 and 2019, respectively. The lowest weed infestation (5 plants m-2) produced minimum weed dry biomass (47 and 85 g m-2), N uptake (1.6 and 2.9), P uptake (0.3 and 0.5), and K uptake (1.7 and 30 kg ha-1) in 2018 and 2019, respectively. The economic threshold of L. chinensis as estimated to cause 6.73% and 6.08% yield loss by the prediction model was 1.70 and 1.73 plants m-2 during 2018 and 2019, respectively. It can be concluded that L. chinensis is a serious weed in direct-seeded rice and it should be controlled when its density reaches 1.70-1.73 plants m-2 to avoid significant yield losses.

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Section: Economic Yield (Kg Ha -1 ) and Yield Losses Estimationmentioning

confidence: 81%

Estimation of the economic threshold of Leptochloa chinensis (Chinese sprangletop) in direct-seeded fine grain rice (Oryza sativa)

et al. 2023

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“…Pada musim hujan ataupun musim kering, Famili Linderniaceae dapat terus hidup sehingga memiliki daya adaptasi yang tinggi. Menurut Kwon et al (2011), ambang ekonomi yang diperlukan saat pengendalian Lindernia dubia yaitu pada kerapatan 384 individu per-m 2 . Menurut metode Cousens kepadatan ambang ekonomi L. dubia yaitu sebesar 34,9 per-m 2 .…”

Section: Hasil Dan Pembahasanunclassified

ANALYSIS OF WEED VEGETATION ON PLANTATIONS KENAF (Hibiscus cannabinuS L.) IN DLIMAS, CEPER, KLATEN, CENTRAL JAVA

Rohim,

Budi Bhakti Bumi,

Thohari

2022

Agrivet

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Weed vegetation analysis is very necessary in controlling weeds in kenaf (Hibiscus cannabinus L.) plantations because weeds can compete in taking nutrients, water, sunlight, air, and growing space. A study on the analysis of weed vegetation in kenaf plantations was carried out in March 2022 in Dlimas Village, Ceper District, Klaten Regency, Central Java. This study aims to obtain the diversity of weed species and structures which include species, density, frequency, and weed dominance as the basis for proper, effective, and efficient control. The research was conducted by random sampling technique using the square method of 0.5 m x 0.5 m plot size with 3 replications. Furthermore, weeds in the sample plots were taken and identified using plantnet software to be matched with references. The results showed that there were 8 species of grass weeds, 3 species of tekian weeds, and 6 species of broadleaf weeds. Weeds found in kenaf plantations were dominated by broadleaf species. The three dominant weeds were Lindernia dubia L. Pennel (SDR 25,80 %), Eleusine indica L. Gaertn (SDR 8,90 %), and Phyllanthus urinaria (SDR 7,90 %).

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“…In Europe, it is considered to be a potential plant for widespread expansion ( Hroudová et al., 2014 ). Previous studies have determined the economic threshold of S. planiculmis in rice fields ( Kwon et al., 2008 ; Kwon et al., 2011 ) and screened chemical control agents ( Choi et al., 2000b ; Hwang et al., 2006 ; Park et al., 2011 ). However, with changes in cropping systems and cultivation patterns, S. planiculmis has become a major weed in cotton fields in Xinjiang and the Yellow River basin in China ( Fang et al., 2016 ; Huang et al., 2020 ), leading to cotton yield reductions of 1.86−61.50% ( Cai et al, 2020a ).…”

Section: Introductionmentioning

confidence: 99%

Protective enzyme activity regulation in cotton (Gossypium hirsutum L.) in response to Scirpus planiculmis stress

Zhang

Peng²,

Wang³

2022

Front. Plant Sci.

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Scirpus planiculmis, an important weed in rice and cotton fields, stresses crop growth and development, leading to yield loss. However, it is unclear how stressed plants respond to this weed. In this study, we analysed the stress effect of S. planiculmis on cotton under different weed densities, competition periods, and distribution conditions from the perspective of morphogenesis, physiological metabolism and crop yield. The effect of a low dose of herbicide on the relationship between cotton and S. planiculmis was also explored. The results showed that plant height, stem diameter, fresh weight, root length, boll number, single boll weight and yield of cotton all decreased with increasing S. planiculmis density and damage. The spatial distribution of S. planiculmis had no significant effect on plant height, stem diameter, fresh weight or root length of cotton, but crop yield loss decreased with increasing distance. S. planiculmis stress altered cotton chlorophyll, soluble protein and malondialdehyde (MDA) content, and protective enzyme activities. Compared with superoxide dismutase (SOD) and peroxidase (POD) activities, catalase (CAT) activity was increased under different S. planiculmis stress conditions. Therefore, we concluded that CAT plays a key role in protecting enzymes involved in defence responses. Under low-dose herbicide action, the activities of protective enzymes were increased, which helped cotton plants to resist S. planiculmis stress. The results revealed that regulating protective enzyme activities is important in cotton responses to S. planiculmis stress.

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Rice Yield Loss and Economic Threshold Levels by Densities of Scirpus planiculmis and Lindernia dubia in Wet-Seeded Rice Paddy Fields

Cited by 4 publications

References 1 publication

Estimation of the economic threshold of Leptochloa chinensis (Chinese sprangletop) in direct-seeded fine grain rice (Oryza sativa)

Estimation of the economic threshold of Leptochloa chinensis (Chinese sprangletop) in direct-seeded fine grain rice (Oryza sativa)

ANALYSIS OF WEED VEGETATION ON PLANTATIONS KENAF (Hibiscus cannabinuS L.) IN DLIMAS, CEPER, KLATEN, CENTRAL JAVA

Protective enzyme activity regulation in cotton (Gossypium hirsutum L.) in response to Scirpus planiculmis stress

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