Abstract
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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Claims 4
Claim · model-written summary
Knapsack application of pre-emergence pretilachlor significantly reduced weed density and dry weight.
- Taxon
- Rice
Oryza sativat0 - Treatment
- pre-emergence pretilachlore1
- Interactor
- grasses, sedges and broad leaved weedse1weed
- Outcome
- density and dry weight of grasses, sedges and broad leaved weedse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“application of pre-emergence pretilachlor significantly reduced the density and dry weight of grasses, sedges and broad leaved weeds in knapsack application”
Claim · model-written summary
UAV application of the same herbicide performed on par with knapsack spraying.
- Taxon
- riceOryza sativae1
- Treatment
- UAV application of same herbicidee1
- Outcome
- on pare1
- Direction
- on pare1
- Comparator
- knapsack applicatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“it was found on par with UAV application of same herbicide without any phytotoxicity to rice seedlings”
e2“weeds in knapsack application”
Claim · model-written summary
UAV herbicide application caused no phytotoxicity in rice seedlings.
- Taxon
- riceOryza sativae1
- Treatment
- UAV application of same herbicidee1
- Outcome
- without any phytotoxicity to rice seedlingse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“UAV application of same herbicide without any phytotoxicity to rice seedlings”
Claim · model-written summary
UAV pretilachlor application was recommended for timely early weed control and reduced labor burden.
- Taxon
- riceOryza sativae1
- Treatment
- pre-emergence pretilachlor through UAVe1
- Outcome
- timely weed control during early stages in direct-seeded ricee1
- Comparator
- knapsack applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“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”
The same questions in other papers
Pretilachlor · weed · Oryza sativa (rice)Results differ
146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
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See all 150 papers →herbicide · weed · Oryza sativa (rice)Positive and negative results
578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative
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See all 603 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.