Variable rate application of plant protection products in vineyard using ultrasonic sensors
Fecha de publicación2007
Gil Moya, Emilio
MetadatosMostrar el registro completo del ítem
The changes in the shape and size of vines during the growing season require a continuous adjustment of the applied dose to optimize spray application efficiency. Target detection with ultrasonic sensors can be used to adapt the applied dose following the principles of the variable rate technology.
A multi-nozzle air-blast sprayer was fitted with three ultrasonic sensors and three electro-valves, to modify the flow rate from the nozzles in real time, in relation to the variability of crop width. A constant application rate of 300 l ha−1 was compared with a variable rate application using the tree row volume principle at a 0.095 l m−3 canopy. The total flow rate sprayed by the nozzles was modified according to the variations of crop width measured by the ultrasonic sensors. On average 58% less liquid was applied compared to the constant rate application, with similar deposition on leaves with both treatments. A detailed analysis of savings indicates differences between the lower, middle and top part of the crop, in accordance with the leaf area distribution with crop height. No significant differences between treatments were detected in uniformity of liquid distribution and capability to reach the inner parts of the crop. This important reduction in spray volume could be followed by an equivalent reduction of plant protection products but further research work is needed to guarantee biological efficacy of a reduced dose.
Es parte deCrop Protection, 2007, vol. 26, núm. 8, p. 1287-1297
Showing items related by title, author, creator and subject.
Escolà i Agustí, Alexandre; Planas de Martí, Santiago; Rosell Polo, Joan Ramon; Pomar Gomà, Jesús; Camp, Ferran; Solanelles Batlle, Francesc; Gràcia, Felip; Llorens Calveras, Jordi; Gil Moya, Emilio (Molecular Diversity Preservation International (MDPI), 2011)Electronic canopy characterization is an important issue in tree crop management. Ultrasonic and optical sensors are the most used for this purpose. The objective of this work was to assess the performance of an ultrasonic ...
Escolà i Agustí, Alexandre; Rosell Polo, Joan Ramon; Planas de Martí, Santiago; Gil Moya, Emilio; Pomar Gomà, Jesús; Camp, Ferran; Llorens Calveras, Jordi; Solanelles Batlle, Francesc (Elsevier, 2013)Discussions in recent decades about dosage models for applying plant protection products in orchards have failed to reach a compromise solution. Furthermore, canopies are spatially variable, and a uniform dose may not be ...
Ultrasonic and LIDAR sensors for electronic canopy characterization in vineyards: advances to improve pesticide application methods Llorens Calveras, Jordi; Gil Moya, Emilio; Llop, Jordi; Escolà i Agustí, Alexandre (Molecular Diversity Preservation International (MDPI), 2011)Canopy characterization is a key factor to improve pesticide application methods in tree crops and vineyards. Development of quick, easy and efficient methods to determine the fundamental parameters used to characterize ...