Western New York Berry Update
April 3, 2020
By Esther Kibbe
Western New York Berry Specialist, Cornell Cooperative Extension
April 3, 2020
Strawberries
New leaves are starting to push under the straw. With no extended cold in the forecast, research has shown that it is better to remove straw early, if leaves are emerging, rather than basing it on the calendar. Consider getting out there to rake it off soon.
This is also the time to apply preemergent herbicides against annual weeds. Chateau or Devrinol can be used. Aim, Axxe and Gramoxone are options as more weeds emerge, or against winter annuals, but should be applied with a shielded sprayer.
Strawberry leaves emerging from the crown.
Blueberries
Depending on microclimate, buds are just swelling to early green-tip. If you haven’t already, this is the time to go after cane diseases (Phomopsis, Botrytis, Fusicoccum) with a delayed dormant spray of lime sulfur or copper. Several fungicides are also labeled for these, but I would save them unless you are dealing with a severe, recurring level of infection.
As you finish pruning, be sure to cut out any diseased canes and gall wasp galls. Start planning your spring herbicide applications. Blueberries have many herbicide options—the best choice depends on what your weed issues are.
Blueberry buds are between bud-swell and early green tip.
Raspberries
Still looking pretty dormant. Copper, dormant oil or lime sulfur sprays can be applied for cane blights. This is the time to get started on weed control: Devrinol, Surflan, Sinbar for preemergent weeds (annuals), Axxe for post-emergent broadleaves, and Poast or Fusilade for perennial grasses.