Tag Archives: pathogen

507–519 S. Kodors, G. Lacis, O. Sokolova2,V. Zhukovs, I. Apeinans and T. Bartulsons
Apple scab detection using CNN and Transfer Learning
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Apple scab detection using CNN and Transfer Learning

S. Kodors¹*, G. Lacis², O. Sokolova2,V. Zhukovs¹, I. Apeinans¹ and T. Bartulsons²

¹Rezekne Academy of Technologies, Faculty of Engineering, Institute of Engineering, Atbrivoshanas Str. 115, LV-4601 Rezekne, Latvia
²Institute of Horticulture, Graudu Str. 1, LV-3701 Ceriņi, Krimūnu pagasts, Dobeles novads, Latvia
*Correspondence: sergejs.kodors@rta.lv

Abstract:

The goal of smart and precise horticulture is to increase yield and product quality by simultaneous reduction of pesticide application, thereby promoting the improvement of food security. The scope of this research is apple scab detection in the early stage of development using mobile phones and artificial intelligence based on convolutional neural network (CNN) applications. The research considers data acquisition and CNN training. Two datasets were collected – with images of scab infected fruits and leaves of an apple tree. However, data acquisition is a time-consuming process and scab appearance has a probability factor. Therefore, transfer learning is an appropriate training methodology. The goal of this research was to select the most suitable dataset for transfer learning for the apple scab detection domain and to evaluate the transfer learning impact comparing it with learning from scratch. The statistical analysis confirmed the positive effect of transfer learning on CNN performance with significance level 0.05.

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511-516 M. Starast, N. Galynskaya, K. Jõgar, T. Tasa, K. Karp and U. Moor
Blueberry diseases survey in Estonia
Abstract |
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Blueberry diseases survey in Estonia

M. Starast¹, N. Galynskaya², K. Jõgar¹, T. Tasa³, K. Karp¹ and U. Moor¹

¹Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences,Department of Horticulture, Kreutzwaldi 1, 51014 Tartu, Estonia
²The Central Botanic Garden, National Academy of Sciences of Belarus, 2B Surganava St.,Minsk BY-220012, Republic of Belarus
³Plant Production Inspectorate, Teaduse 2, Saku, Harjumaa 75501, Estonia;e-mail: marge.starast@emu.ee

Abstract:

In Estonian University of Life Sciences at the Department of Horticulture a blueberry-cultivation project was started in 1997. Nowadays blueberry cultivation is developing into a promising activity for small farms and efforts have been made to maintain blueberries in the different regions of the country. Surveys were conducted to determine the occurence of diseases in commercial blueberry fields at three farms of South Estonia. One plantation was located on peat (abandoned peat pits) soil and two plantations on mineral soil. Pesticides were not used in the blueberry plantations. Diseases were observed at the end of harvesting time (late August) in 2006. Several lowbush blueberry (Vaccinium angustifolium Ait.), highbush blueberry (V. corymbosum L.) and half-highbush blueberry (V. corymbosum x V. angustifolium.) cultivars were represented. In all plantations several plant diseases were found whereby Pucciniastrum vaccinii Wint. occured often. Lowbush blueberry plants were more disease-resistant than highbush and half-highbush blueberries. In the plantation located on peat soil the infection of diseases was lower.

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