Comparing Greenhouse Handgun Delivery to Poinsettias by Spray Volume and Quality

Derksen, R. C.; Frantz, Jonathan M.; Ranger, Christopher M.; Locke, James; Zhu, Heping; Krause, C. R.

doi:10.13031/2013.24214

Cited by 22 publications

(27 citation statements)

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“…Plant protection products in the greenhouses of south‐eastern Spain are normally applied by low‐technology manual systems, which are difficult to regulate and in which the quality of the treatment depends mainly on the skill of the operator. The equipment most often used consists of manual spray guns working at high pressures (1500–4000 kPa), applying high unit flow (greater than 1500 L ha −1 on fully developed crops), because the farmer sees the cover being achieved on the canopy 3. The equipment is low cost, easily maintained, versatile and adequate for controlling small‐scale, localised phytosanitary problems.…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of a self‐propelled sprayer and effects of the application rate on spray deposition and losses to the ground in greenhouse tomato crops

López

Rincón

Páez

et al. 2011

Pest Management Science

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Section: Introductionmentioning

confidence: 99%

Field evaluation of a self‐propelled sprayer and effects of the application rate on spray deposition and losses to the ground in greenhouse tomato crops

López

Rincón

Páez

et al. 2011

Pest Management Science

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“…In greenhouse spray application, handgun equipment and spray booms are common choices, while the spray booms are demonstrated to work better in efficiency and reducing deposition variations at different locations in canopy than handgun equipment [34,35,36]. …”

Section: Introductionmentioning

confidence: 99%

Evaluation of Object Surface Edge Profiles Detected with a 2-D Laser Scanning Sensor

Yan

Wang

Zhu

et al. 2018

Sensors

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Canopy edge profile detection is a critical component of plant recognition in variable-rate spray control systems. The accuracy of a high-speed 270° radial laser sensor was evaluated in detecting the surface edge profiles of six complex-shaped objects. These objects were toy balls with a pink smooth surface, light brown rectangular cardboard boxes, black and red texture surfaced basketballs, white smooth cylinders, and two different sized artificial plants. Evaluations included reconstructed three-dimensional (3-D) images for the object surfaces with the data acquired from the laser sensor at four different detection heights (0.25, 0.50, 0.75, and 1.00 m) above each object, five sensor travel speeds (1.6, 2.4, 3.2, 4.0, and 4.8 km h−1), and 8 to 15 horizontal distances to the sensor ranging from 0 to 3.5 m. Edge profiles of the six objects detected with the laser sensor were compared with images taken with a digital camera. The edge similarity score (ESS) was significantly affected by the horizontal distances of the objects, and the influence became weaker when the objects were placed closer to each other. The detection heights and travel speeds also influenced the ESS slightly. The overall average ESS ranged from 0.38 to 0.95 for all the objects under all the test conditions, thereby providing baseline information for the integration of the laser sensor into future development of greenhouse variable-rate spray systems to improve pesticide, irrigation, and nutrition application efficiencies through watering booms.

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“…Quin et al (2016) showed a negative correlation between tolerance of P. infestans populations to azoxystrobin and the mean annual temperature of region of sample origin. In laboratory scale, higher temperature of fungicide mixture (50°C versus 20°C) may increase biological versal model of spray volume optimization according to the crop canopy structure has not been developed due to high variability between crop plants (Derksen et al, 2008). As far as vegetable crops are concerned, SV is almost exclusively expressed in terms of land surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of the spray volume adjustment model on the efficiency of fungicides and residues in processing tomato

Ratajkiewicz

Kierzek

Raczkowski

et al. 2016

Span. j. agric. res.

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This study compared the effects of a proportionate spray volume (PSV) adjustment model and a fixed model (300 L/ha) on the infestation of processing tomato with potato late blight (Phytophthora infestans (Mont.) de Bary) (PLB) and azoxystrobin and chlorothalonil residues in fruits in three consecutive seasons. The fungicides were applied in alternating system with or without two spreader adjuvants. The proportionate spray volume adjustment model was based on the number of leaves on plants and spray volume index. The modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method was optimized and validated for extraction of azoxystrobin and chlorothalonil residue. Gas chromatography with a nitrogen and phosphorus detector and an electron capture detector were used for the analysis of fungicides. The results showed that higher fungicidal residues were connected with lower infestation of tomato with PLB. PSV adjustment model resulted in lower infestation of tomato than the fixed model (300 L/ha) when fungicides were applied at half the dose without adjuvants. Higher expected spray interception into the tomato canopy with the PSV system was recognized as the reasons of better control of PLB. The spreader adjuvants did not have positive effect on the biological efficacy of spray volume application systems. The results suggest that PSV adjustment model can be used to determine the spray volume for fungicide application for processing tomato crop.

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Comparing Greenhouse Handgun Delivery to Poinsettias by Spray Volume and Quality

Cited by 22 publications

References 0 publications

Field evaluation of a self‐propelled sprayer and effects of the application rate on spray deposition and losses to the ground in greenhouse tomato crops

Field evaluation of a self‐propelled sprayer and effects of the application rate on spray deposition and losses to the ground in greenhouse tomato crops

Evaluation of Object Surface Edge Profiles Detected with a 2-D Laser Scanning Sensor

Effect of the spray volume adjustment model on the efficiency of fungicides and residues in processing tomato

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