Use of Thermal Imaging to Assess Water Status in Citrus Plants in Greenhouses

The direct examination of plant canopy temperature can assist in optimizing citrus irrigation management greenhouses. This study aimed to develop a method measure using thermal imaging one-year-old plants greenhouse identify with water stress and verify its potential be used as tool assess status. experiment was conducted for 48 days (27 November 2019 13 January 2020). We evaluated the influence five levels on two species (‘Red Ruby’ grapefruit (Citrus paradisi) ‘Valencia’ sweet orange sinensis (L.) Osbeck)). Images were taken portable camera analyzed open-source software. determined temperature, leaf photosynthesis transpiration, biomass. results indicated positive relationship between amount applied response exposed different levels. Grapefruit that received less submitted restrictions showed higher temperatures than air (up 6 °C). images easily identified water-stressed plants. Our proof-of-concept allowed quickly obtaining readily available equipment status greenhouses perhaps commercial operations mature trees field after specific experimentation. technique, coupled an automated system, scheduling. Thus, setting up limit is necessary start system set time based soil content. To use this process large scale, it apply automation routine real remove weeds from background determine temperature.