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The aim of this work was to evaluate the differences in growth parameters of one- and two-year-old plants of a day-neutral strawberry Aromas® grown in the Atlantic Coast production area of Buenos Aires, Argentina. Fresh-dug, leafless, bare-rooted plants were planted in the second week of May of the years 2009 and 2010. Two-year-old plants (T2) showed higher total biomass production, fruit yield and precocity. Crown and root yields of T2 plants in October were 49 and 32 times higher, respectively, and leaf area of T2 plants was three times larger than leaf area of one-year-old plants. T2 plants yielded a higher proportion of crowns and roots, and a lower proportion of dry matter partitioning into leaves. Fruits were the strongest photoassimilates sink (65% to 72% of dry weight accumulation), followed by leaves (13% to 20%), crowns (6% to 10%), roots (2% to 7%), and inflorescences (3% to 4%). Individual fruit weight from T2 plants was lighter than fruit weight of one-year-old plants, and this difference was observed principally from October to December, when T2 plants carried a high fruit load. T2 plants showed a decline in all measured growth parameters from February onwards, associated with crown and root diseases. [ABSTRACT FROM AUTHOR]

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The incidence and prevalence of strawberry viruses were determined in surveys of randomly selected strawberry plants grown in different regions of Argentina. In 2009 and 2010, 1034 plants from 28 fields and 1060 plants from 33 fields, respectively, were collected from Lules and Coronda. The samples were analysed by double‐antibody sandwich enzyme‐linked immunosorbent assay to detect Strawberry mild yellow edge virus (SMYEV). In 2014, 606 plants from 43 fields in Lules, Coronda and Mar del Plata were analysed by reverse transcription polymerase chain reaction with primers specific for SMYEV, Strawberry crinkle virus (SCV), Strawberry mottle virus (SMoV) and Strawberry polerovirus 1 (SPV1). The SMYEV incidence was 4–35%, while prevalence was 60–100%, depending on the year and region sampled. Meanwhile, SMoV and SPV1 incidences were 8–17%, and prevalences were 46–62%, depending on the virus and region sampled. SCV was observed relatively low (incidence was 0.5–8% and prevalence was 8–50%), although it was more abundant in Mar del Plata than in the other analysed regions. Spearman's correlation analysis indicated that SCV and SMYEV were correlated with disease symptoms (P < 0.005). A principal component analysis revealed a close relationship between SMYEV and SCV in Mar del Plata, in which the lowest temperatures were recorded. Interactions among viruses, regions and climatic conditions will need to be studied in greater detail. Accurately determining the incidence and prevalence of viruses in different regions will improve estimations of possible damages or yield decreases caused by viral infections during strawberry production. [ABSTRACT FROM AUTHOR]