Bio-efficacy of pre-and post-emergence herbicides on weed control and yield of rainfed lowland rice

Gangireddy, G.; Subramanyam, D.

doi:10.5958/0974-8164.2020.00032.5

Cited by 4 publications

(1 citation statement)

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“…This might be due to the application of pretilachlor at 3 DAS which effectively controlled the germinating weeds at the plumule-initiation stage by inhibiting the cell division and the presence of fenclorim protects the crop from phytotoxicity under low spray volume of 40 L/ha. The results were in line with the findings of Suganthi et al (2005). The density of grasses, sedges and BLW was significantly higher in the unweeded check (T 5 ).…”

Section: Weed Density and Weed Dry Weightsupporting

confidence: 90%

UAV-based Herbicide Application for Efficient Weed Management in Direct-seeded Rice

Paul,

Arthanari,

Pazhanivelan

et al. 2023

ASD

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Background: Weeds are the key pest, which reduce crop productivity. Direct-seeded rice is very prone to early-stage weed infestation during initial crop development. Cultural and mechanical methods are difficult due to unavailability of labour and poor work efficiency. Hence, use of herbicides is an effective method for timely weed control. However, the efficacy of agrochemicals depends on the efficiency of spraying equipment. Conventional knapsack sprayers are used most often to spray herbicides but they are highly time-consuming, labour intensive and labour drudgery practices. Hence, the current experiment was aimed to study the efficiency of unmanned aerial vehicles (UAVs) on weed management. Methods: A field experiment was conducted at Tamil Nadu Agricultural University, Coimbatore during summer, 2022 to evaluate the efficacy of UAV-based herbicide application in direct-seeded rice. The study comprised of five weed management treatments such as pre emergence application of pretilachlor with safener and pyrazosulfuron through both UAV and knapsack sprayer and unweeded check as control. The experimental plot was laid out in a randomized block design with four replications. Result: The experimental findings showed that the application of pre-emergence pretilachlor significantly reduced the density and dry weight of grasses, sedges and broad leaved weeds in knapsack application. Moreover, it was found on par with UAV application of same herbicide without any phytotoxicity to rice seedlings. From the experiment, the application of pre-emergence pretilachlor through UAV is found to be more effective for timely weed control during early stages in direct-seeded rice, which reduce the labour intensity and drudgery than knapsack application.

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Section: Weed Density and Weed Dry Weightsupporting

confidence: 90%

UAV-based Herbicide Application for Efficient Weed Management in Direct-seeded Rice

Paul,

Arthanari,

Pazhanivelan

et al. 2023

ASD

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Herbicide application impacted soil microbial community composition and biochemical properties in a flooded rice field

Bhardwaj,

Kumar,

Singh

et al. 2024

Science of The Total Environment

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Comparison of potassium quantity-intensity relationships in tropical paddy soil under tillage and no-tillage systems after fifteen growing seasons

Isnaini¹,

Maryati²,

Rivaie³

2023

PLANT SOIL ENVIRON

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In lowland rice (Oryza sativa L.) cultivation, soil puddling will make rice roots easy to develop, making it easier to do seedling transplanting (Huang et al. 2016). However, plowing causes soil particles and nutrients to drift along with water flow. This results in increased water sedimentation and decreased decomposition rate of organic matter (Sharma and De Datta 1985). Therefore, it is not surprising that in many Asian rice-producing countries, the environmental damage to agricultural lands is directly or indirectly caused by intensive rice production with perfect soil tillage that has been happening for decades (Reddy and Hukkeri 1983).Weeds in lowland rice cultivation reduce rice yields not only because they compete for soil nutrients, moisture, and sunlight but also because they may be an alternate host for insects and diseases of rice. Normally, weed control requires a lot of labour (Lhungdim et al. 2019); hence the use of chemicals (herbicides) for weed control before planting worth to be trying (Gangireddy and Subramanyam 2020). The soil tillage activities for rice cultivation in paddy fields do not absolutely require tillage because the availability of water in paddy fields can actually help the puddling process (Prasanthkumar et al. 2021).

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Bio-efficacy of pre-and post-emergence herbicides on weed control and yield of rainfed lowland rice

Cited by 4 publications

References 0 publications

UAV-based Herbicide Application for Efficient Weed Management in Direct-seeded Rice

UAV-based Herbicide Application for Efficient Weed Management in Direct-seeded Rice

Herbicide application impacted soil microbial community composition and biochemical properties in a flooded rice field

Comparison of potassium quantity-intensity relationships in tropical paddy soil under tillage and no-tillage systems after fifteen growing seasons

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