Spray deposition inside multiple-row nursery trees with a laser-guided sprayer1
| Autor: | R. H. Zondag, H. Liu, Hengyu Liu, H. Zhu, Y. Shen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Sprayer Acoustics Nozzle 04 agricultural and veterinary sciences Horticulture Environmental Science (miscellaneous) Laser 01 natural sciences 040501 horticulture law.invention Tree structure law visual_art Botany Sterling silver visual_art.visual_art_medium Environmental science 0405 other agricultural sciences 010606 plant biology & botany |
| Zdroj: | Journal of Environmental Horticulture. 35:13-23 |
| ISSN: | 2573-5586 0738-2898 |
| DOI: | 10.24266/0738-2898-35.1.13 |
| Popis: | Multiple-row container-grown trees require specially designed sprayers to achieve efficient spray delivery. A five-port air-assisted sprayer with both automatic and manual control modes was developed to discharge adequate spray deposition inside multiple-row trees. The sprayer resulted from integration of a high-speed laser-scanning sensor with a sophisticated nozzle flow control system, an embedded computer with a touch screen, a Doppler speed sensor, a specially-designed algorithm and an air-assisted sprayer base. It was able to detect target tree presence and measure target tree size, shape and leaf density. The sprayer then controlled the spray output of each nozzle to match tree structures. The sprayer was tested for its sprayer deposition quality inside canopies in a four-row sterling silver linden (Tilia tomentosa 'Sterling Silver' Moench) field and another six-row northern red oak (Quercus rubra L.) field. Tests were conducted with the sprayer in variable-rate application (VRA) and constant-rate application (CRA) modes. The average spray deposit on foliage of trees was 1.37±0.47 μL cm−2 from VRA and 1.29±0.42 μL cm−2 from CRA in linden, and was 2.15±0.57 μL cm−2 from VRA and 2.72±0.94 μL cm−2 from CRA in red oak, respectively. In comparison, spray coverage on foliage of trees was 19.8±3.0% from VRA and 20.9±4.3% from CRA in the linden trial, and was 27.9±3.7% from VRA and 30.5±5.4% from CRA, respectively, in the red oak trial. The newly developed air-assisted sprayer in both VRA and CRA modes would be able to discharge adequate spray deposition inside multiple-row tree plants while conserving pesticide. Index words: environmental protection, pest control, pesticide, precision sprayer, spray coverage. Species used in this study: sterling silver linden (Tilia tomentosa 'Sterling Silver' Moench), northern red oak (Quercus rubra L.). |
| Databáze: | OpenAIRE |
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