Abstract
Efficient and accurate application of pesticides can improve biological efficacy, reduce insecticide resistance, and protect the environment. The rapid development of unmanned aerial vehicle s (UAV) technology as a new method of pesticide application using low spray volumes demands scientific evaluation compared to conventional practices. The objective of this research was to analyze the effects of spray volume and tank-mix adjuvants on droplet deposition, canopy penetration, and control of rice blast disease and rice leaf roller when applied by UAV technology on rice. An electric backpack sprayer was used as the standard method of application for comparison. Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application. The control efficacy of the UAV sprayer was basically equal to or slightly worse than the backpack sprayer. These data indicate that a UAV application made at a spray volume of 18 L/hm 2 with the addition of a methylated crop oil adjuvant at panicle initiation provided excellent blast and leaf roller control. Keywords: UAV, adjuvant, biological efficacy, deposition, low-volume spray, rice DOI: 10.33440/j.ijpaa.20200302.86 Citation: Wang G B, Li X, Andaloro J, Chen P C, Song C C, Shan C F, et al. Deposition and biological efficacy of UAV-based low-volume application in rice fields. Int J Precis Agric Aviat, 2020; 3(2): 65–72.
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Claims 8
Claim · model-written summary
Higher UAV spray volume increased droplet density and coverage.
- Taxon
- rice
Oryza sativat0 - Treatment
- Increasing the spray volumee0
- Outcome
- droplet density, percentage of spray coveragee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
t0“rice fields”
Claim · model-written summary
Adjuvant addition increased UAV droplet density and coverage.
- Taxon
- riceOryza sativat0
- Treatment
- adding an adjuvante0
- Outcome
- droplet density, percentage of spray coveragee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
t0“rice fields”
Claim · model-written summary
Higher UAV spray volume improved rice blast control.
- Taxon
- riceOryza sativae0
- Treatment
- Increasing the spray volumee0
- Outcome
- control of rice blaste0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
Claim · model-written summary
Adjuvant addition improved rice blast control.
- Taxon
- riceOryza sativae0
- Treatment
- adding an adjuvante0
- Outcome
- control of rice blaste0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
Claim · model-written summary
Higher UAV spray volume improved rice leaf roller control.
- Taxon
- riceOryza sativae0
- Treatment
- Increasing the spray volumee0
- Outcome
- rice leaf rollere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
Claim · model-written summary
Adjuvant addition improved rice leaf roller control.
- Taxon
- riceOryza sativae0
- Treatment
- adding an adjuvante0
- Outcome
- rice leaf rollere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the spray volume and adding an adjuvant significantly increased droplet density, percentage of spray coverage, and control of rice blast and rice leaf roller for the UAV application”
Claim · model-written summary
UAV sprayer control efficacy was equal to or slightly worse than backpack spraying.
- Taxon
- riceOryza sativat0
- Outcome
- control efficacye0
- Direction
- equal to or slightly worsee0
- Comparator
- backpack sprayere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The control efficacy of the UAV sprayer was basically equal to or slightly worse than the backpack sprayer”
t0“rice fields”
Claim · model-written summary
UAV application at 18 L/hm 2 with methylated crop oil at panicle initiation gave excellent blast and leaf roller control.
- Taxon
- riceOryza sativat0
- Organ / stage
- panicle initiatione0
- Treatment
- methylated crop oil adjuvante0
- Outcome
- excellent blast and leaf roller controle0
- Value
- 18 L/hm 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a UAV application made at a spray volume of 18 L/hm 2 with the addition of a methylated crop oil adjuvant at panicle initiation provided excellent blast and leaf roller control”
t0“rice fields”
The same questions in other papers
adjuvant · organism · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
application · organism · Oryza sativa (rice)Positive and negative results
21 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
23 papers more in this group
See all 27 papers →application · disease · Oryza sativa (rice)Positive and negative results
154 papers in the same direction as this paper · 16 in the opposite direction
- negative
- negative
- no effect
167 papers more in this group
See all 171 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.