Dimas Pereira-Obaya

University of Leon | UNILEON

This study explores spectroscopy in the 350 to 2500 nm range for detecting powdery mildew (Erysiphe necator) in grapevine leaves, crucial for precision agriculture and sustainable vineyard management. In a controlled experimental vineyard setting, the spectral reflectance on leaves with varying infestation levels was measured using a FieldSpec 4 sp...

Chestnut and chestnut byproducts are of worldwide interest, so there is a constant need to develop faster and more accurate monitoring techniques. Recent advances in simultaneous localization and mapping (SLAM) algorithms and user accessibility have led to increased use of handheld mobile laser scanning (HHLS) in precision agriculture. We propose a...

While populations of the Asian chestnut gall wasp (Dryocosmus kuriphilus Yasumatsu), an invasive pest affecting the European chestnut (Castanea sativa Miller), have started to be controlled biologically, this pest still conditions chestnut tree development. With the aim of assessing plant health status as a means of monitoring gall wasp infestation...

Powdery Mildew (Erysiphe necator) is a pathogen present in many vineyards worldwide that cause quantitative and qualitative losses in production. A methodology based on field spectroscopy is presented in order to identify different degrees of affection by Powdery Mildew in Tempranillo and Verdejo varieties. The work was developed at leaf scale usin...

In viticulture, information about vine vigour is a key input for decision-making in connection with production targets. Pruning weight (PW), a quantitative variable used as indicator of vegetative vigour, is associated with the quantity and quality of the grapes. Interest has been growing in recent years around the use of unmanned aerial vehicles (...

Visible, near, and shortwave infrared (VIS-NIR-SWIR) reflectance spectroscopy, a costeffective and rapid means of characterizing soils, was used to predict soil sample properties for four vineyards (central and north-western Spain). Sieved and air-dried samples were measured using a portable spectroradiometer (350–2500 nm) and compared for pistol g...

The mapping of Fuel Models is a key tool in decision-making processes for the prevention and defense against forest fires. This paper presents a methodology based on the use of time series of Sentinel 2 MSI satellite images, with the aim of complementing the information necessary in the generation of mapping of forest fuel models, identifying in an...