Abstract
Agricultural productivity cannot be sustained without the application of plant protection measures. Within the framework of integrated pest management (IPM), the use of chemical pesticides should be limited to the last option among the available practices. Even though their use remains common, it carries associated environmental and human health risks. One of the most accepted practices within IPM is the reduction of spraying events and/or pesticide applied doses. DOSA3D is a decision support system that allows the dose to be adjusted to the specific treatment scenario. For this, DOSA3D calculates the optimal application volume rate by estimating the leaf area index and takes into account the overall spraying efficiency and the pest or disease to be controlled. The system adopts specific minimum volume rates for fruit trees and vineyards without compromising the crop health status. To establish the adjusted dose, the labeled or the adviser prescription concentration is kept. Resulting adjusted doses provided by DOSA3D achieved pesticide savings up to 53% in fruit trees and 60% in vineyards. DOSA3D has been validated against the main diseases and pests of fruit trees and vineyards: brown spot and psylla in pear orchards; alternaria blotch disease, apple scab, codling moth, oriental moth and red spider mite in apple orchards; powdery mildew, brown rot, aphids, thrips and mites in peach orchards; and, powdery mildew, yellow spider mite and leafhoppers in grapevine orchards. In addition, a methodology called Green Way is presented to provide consistent and crop safety pesticide doses when these are labeled as concentration or ground area doses.
Highlights
Pome and stone fruit trees and vineyards are crops of high economic value
Good plant protection practice (GPPP) means a practice whereby the treatments with plant protection products applied to given plants or plant products, in conformity with the conditions of their authorized uses, are selected, dosed and timed to ensure acceptable efficacy with the minimum quantity necessary, taking due account of local conditions and of the possibilities for cultural and biological control (EC, 2009 in art. 3.18) To achieve GPPP, nowadays integrated pest management (IPM) programs are usual in farms
The objectives of this paper are: i) to provide full information on the recently updated technical rationale of the DOSA3D system (Section 2); ii) to explain the work that has been carried out for field validation of DOSA3D in fruit and grapevine orchards (Section 3), providing the results achieved on-farm when spraying according to the volume and dose rates advised by this system; and iii) to propose a methodology to determine the minimum ground dose that prevents the risk of under(sub)-dosing effects (Section 4)
Summary
Pome and stone fruit trees and vineyards are crops of high economic value. In 2019, they represented a worldwide area of 31.8 Mha (FAO, 2020). In years with climatic conditions that favor the development of in-field diseases and/or pests, as was 2020 in Spain, the number of treatments can reach 18–20 in fruit orchards and 10–12 in vineyards In this framework, the use of plant protection products (PPP) continues to be relevant (Deguine et al, 2021). The objectives of this paper are: i) to provide full information on the recently updated technical rationale of the DOSA3D system (Section 2); ii) to explain the work that has been carried out for field validation of DOSA3D in fruit and grapevine orchards (Section 3), providing the results achieved on-farm when spraying according to the volume and dose rates advised by this system; and iii) to propose a methodology to determine the minimum ground dose that prevents the risk of under(sub)-dosing effects (Section 4). The main results obtained as well as the pesticide use and dose adjustment are discussed (Section 5) leading to a series of conclusions (Section 6)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
