RESPONSE OF SOME HIGHBUSH BLUEBERRY CULTIVARS ( VACCINIUM CORYMBOSUM L. ) TO LOW WINTER TEMPERATURES

The frost-resistance of blueberry plants at Skierniewice was evaluated on two variety trials and on a collection.
Using a rating system from 0–5 (0 – plants killed above the soil surface, 5 – plants healthy and good yielding). Altogether, 28 cultivars were evaluated.
In respect of their winter hardiness, cultivars were divided into several groups: resistant (a score higher than 4) Concord, Rancocus, Weymouth and Nr 13–16–17; medium resistant (a score 3–4) Bluecrop, Bluejay, Coville, Darrow, Earliblue, Herma, Jersey, Lateblue, Northland and Record; rather sensitive ( a score 2–3 )- numerous of the tested cultivars; and very sensitive (a score 1–2) Amblue, Blueray, Harrison, Herbert and November Glow.
All plants had winter injury symptoms.
From the cultivars tested, only (Concord, Darrow, Jersey, Lateblue, Northland, Weymouth) produced a medium yield while Harrison, Meader, November Glow and Spartan produced no yield.
The remaining cultivars gave a very low yield.

IV International Symposium on Vaccinium Culture

K. Smolarz

https://doi.org/10.17660/ActaHortic.1989.241.36