Aktuālākās kartupeļu slimības 2015. gadā | Topical potato diseases in 2015 [Latvia]
2015
Bimsteine, G., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Narvils, M., Latvian Rural Advisory and Training Centre, Ozolnieki parish, Ozolnieki municipality (Latvia)
Potato is still one of the four most grown crops in Latvia. Although the growing area decreases every year, potato productivity slowly increases. An important factor for getting higher yield is to keep potato foliage green as long as possible during the growing season. To achieve this result certificated seed material and appropriate crop rotation has to be used, and fungicides applied when it is necessary. In 2015 meteorological conditions were not favourable for developing of potato late blight, caused by Phytophthora infestans which is the most important potato disease. The P. infestans have considerably changed during the last twenty years and disease is getting more aggressive. More often the stem form of late blight is observed. This year the potato early blight caused by Altenaria spp. was dominant disease in potato fields and spread of the disease at the end of the season was 30–97%, depending on variety. Comparatively rainy July influenced the appearance of potato foliar diseases that are not topical every year. This year the bacterial black leg and black dot caused by Colletotrichum coccodes was observed in potato growing farm located in Ozolnieki region.
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