Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application
Pesticide application by unmanned agricultural aerial vehicles (UAVs) has rapidly developed in China and other Asian counties. Currently, tank-mix spray adjuvants are usually added into pesticide solutions to reduce spray drift and facilitate droplet deposition and control efficacy. The currently us...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Agriculture |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0472/12/2/138 |
| _version_ | 1797483890887098368 |
|---|---|
| author | Shilin Wang Xue Li Aijun Zeng Jianli Song Tao Xu Xiaolan Lv Xiongkui He |
| author_facet | Shilin Wang Xue Li Aijun Zeng Jianli Song Tao Xu Xiaolan Lv Xiongkui He |
| author_sort | Shilin Wang |
| collection | DOAJ |
| description | Pesticide application by unmanned agricultural aerial vehicles (UAVs) has rapidly developed in China and other Asian counties. Currently, tank-mix spray adjuvants are usually added into pesticide solutions to reduce spray drift and facilitate droplet deposition and control efficacy. The currently used tank-mix adjuvants are all derived from conventional ground sprays, and their mechanisms of action in aerial applications are still unclear. In order to clarify the spraying characteristics and control efficacy of those adjuvants in aerial sprays, the performances of various types of tank-mix adjuvants were compared by analyzing droplet spectrum, drift potential index (DIX) in a wind tunnel, field deposition and control efficacy on wheat rust and aphids. The atomization results showed that the addition of adjuvants could change the droplet spectrum of liquid, and the results suggest that droplet size is an effective indicator of spray drift potential. In the field application, the meteorological conditions are complex and uncontrollable, and the effects of adjuvants on droplet deposition and distribution were not significant. Compared with the control solution, there was no significant difference in the deposition amount of each adjuvant solution, and the CVs of deposition were higher than 30%. Adding adjuvants to the spray solution can significantly improve the control efficacy of pesticides on wheat aphids and rust and also prolong the duration of the pesticide. Our results suggest that tank-mix adjuvants should be added when UAVs are used for aerial application. This study can be used as a reference to the research and development or selection of adjuvants in aerial sprays of UAVs. |
| first_indexed | 2024-03-09T22:53:35Z |
| format | Article |
| id | doaj.art-c7950913c05843c28458b62dc9f0695e |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-09T22:53:35Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-c7950913c05843c28458b62dc9f0695e2023-11-23T18:15:13ZengMDPI AGAgriculture2077-04722022-01-0112213810.3390/agriculture12020138Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial ApplicationShilin Wang0Xue Li1Aijun Zeng2Jianli Song3Tao Xu4Xiaolan Lv5Xiongkui He6Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaInstitute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaCenter for Chemicals Application Technology (CCAT), College of Science, China Agricultural University, Beijing 100193, ChinaCenter for Chemicals Application Technology (CCAT), College of Science, China Agricultural University, Beijing 100193, ChinaInstitute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaInstitute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, ChinaCenter for Chemicals Application Technology (CCAT), College of Science, China Agricultural University, Beijing 100193, ChinaPesticide application by unmanned agricultural aerial vehicles (UAVs) has rapidly developed in China and other Asian counties. Currently, tank-mix spray adjuvants are usually added into pesticide solutions to reduce spray drift and facilitate droplet deposition and control efficacy. The currently used tank-mix adjuvants are all derived from conventional ground sprays, and their mechanisms of action in aerial applications are still unclear. In order to clarify the spraying characteristics and control efficacy of those adjuvants in aerial sprays, the performances of various types of tank-mix adjuvants were compared by analyzing droplet spectrum, drift potential index (DIX) in a wind tunnel, field deposition and control efficacy on wheat rust and aphids. The atomization results showed that the addition of adjuvants could change the droplet spectrum of liquid, and the results suggest that droplet size is an effective indicator of spray drift potential. In the field application, the meteorological conditions are complex and uncontrollable, and the effects of adjuvants on droplet deposition and distribution were not significant. Compared with the control solution, there was no significant difference in the deposition amount of each adjuvant solution, and the CVs of deposition were higher than 30%. Adding adjuvants to the spray solution can significantly improve the control efficacy of pesticides on wheat aphids and rust and also prolong the duration of the pesticide. Our results suggest that tank-mix adjuvants should be added when UAVs are used for aerial application. This study can be used as a reference to the research and development or selection of adjuvants in aerial sprays of UAVs.https://www.mdpi.com/2077-0472/12/2/138unmanned aerial vehicle sprayerpesticide applicationtank-mix adjuvantspray driftcontrol efficacy |
| spellingShingle | Shilin Wang Xue Li Aijun Zeng Jianli Song Tao Xu Xiaolan Lv Xiongkui He Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application Agriculture unmanned aerial vehicle sprayer pesticide application tank-mix adjuvant spray drift control efficacy |
| title | Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application |
| title_full | Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application |
| title_fullStr | Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application |
| title_full_unstemmed | Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application |
| title_short | Effects of Adjuvants on Spraying Characteristics and Control Efficacy in Unmanned Aerial Application |
| title_sort | effects of adjuvants on spraying characteristics and control efficacy in unmanned aerial application |
| topic | unmanned aerial vehicle sprayer pesticide application tank-mix adjuvant spray drift control efficacy |
| url | https://www.mdpi.com/2077-0472/12/2/138 |
| work_keys_str_mv | AT shilinwang effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT xueli effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT aijunzeng effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT jianlisong effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT taoxu effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT xiaolanlv effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication AT xiongkuihe effectsofadjuvantsonsprayingcharacteristicsandcontrolefficacyinunmannedaerialapplication |