Sprout Field Plant Emergence and Growing Degree Days (GDD)

Wednesday, May 11, 2022

 As I mentioned in the last update, we observed plant emergence in Yarmouth County and I want to share this again to remind growers who plan to apply herbicides in sprout fields.

GDD accumulation at many stations has now exceeded 200 GDD (check Figure 1). An additional 70 GDD is expected to accumulate by Sunday based on current weather forecasts from Environment Canada. From the blueberry GDD model, we can expect plant emergence starting around 270 GDD. Blueberry emergence from cut stems (Figure 2) has already begun and sporadic emergence from rhizomes is also being observed. Growers planning to apply herbicides that may damage emerged blueberry stems, such as Spartan, Ignite, Velpar, or Chikara, should apply these herbicides as soon as possible if they have not already done so.

Figure 2. Blueberry emergence from cut stems (photo credit: Scott White)