Ābeļu kraupja izplatība uz plašāk audzētajām ābeļu šķirnēm dažādos Latvijas reģionos | Scab on commonly grown apple cultivars in different regions of Latvia
2015
Grantina-Ievina, L., Latvian Plant Protection Research Centre, Riga (Latvia) | Rancane, R., Latvian Plant Protection Research Centre, Riga (Latvia) | Jakobija, I., Latvian Plant Protection Research Centre, Riga (Latvia) | Ergle, G., Latvia Univ. of Agriculture, Ltd, Vecauce, Vecauce parish, Auce Municipality (Latvia). Research and Study Farm Vecauce
The choice of apple (Malus domestica) cultivars depends on the climatic conditions in Latvia that are characterized by short vegetation period and incidence of very low winter temperatures, as well as resistance to various diseases. Apple scab (Venturia inaequalis) is the most economically important apple disease world-wide in apple-growing regions, especially in territories with moist and cool climate in spring and frequent rains in summer. Since 2003 Latvian Plant Protection Research Centre has adapted the RIMpro model for apple scab control in Latvian climatic conditions. The main objective of the present investigation was to determine the incidence and severity of apple scab in 27 apple orchards in various regions in Latvia, and to obtain information from farmers on fungicide applications in the season of the year 2015. Apple scab was present in all orchards. Fungicide applications ranged from two to eight, in most cases targeting only the primary infection period of the apple scab. The most heavily affected cultivars were ‘Belorusskoje Maļinovoje’ and ‘Lobo’. For these cultivars more intense application of fungicides are recommended also during the secondary scab infection period.
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