By Becky Wiepz and Dan Kielar
In apples, we will be putting out our last seasonal sprays this week. The window for stop drop sprays has passed in most varieties.
GDD Base 50 remains two to three days ahead of the 20-year average.
|Date 9/8||2017||2018||2019||2020||2021||20-year avg.|
As apple varieties start to ripen, AVG (ReTain) and NAA sprays should be applied per the schedule put together earlier this season. More information on these applications can be found here, here, and here. Your first application should be applied 28-30 days ahead of your first harvest. Most varieties are already too close to harvest for ReTain application, be sure to check maturity before applying.
Harvest has begun throughout the county. Zestar, Paula Red, Early McIntosh, Wealthy, and SweeTango are currently being harvested. Maturity Testing has started for all varieties, be sure to monitor your orchard to determine harvest dates. Color development is great this year but most fruit is still a ways away from being ripe.
This week’s maturity data is as follows:
|Variety||Weight (g)||Firmness (psi)||Starch Rating (1-8)||Soluble Solids (brix)|
If you’re interested in ongoing maturity data please contact us at: email@example.com
Flight is over for both Apple Maggot and Codling Moth county-wide. Low numbers of minor pests are still being observed including Japanese Beetles, Tarnished Plant Bugs, American Plum Borers, and various wasp species.
Final pre-harvest sprays for fruit rots can be applied now. Be sure to check labels for re-entry and pre-harvest intervals.
Some late-season fungicide options include Pristine, Merivon, Luna Sensation, and Flint.
Summer pruning or hedging of trees should ideally be done before mid-September to keep the canopy open while allowing the cuts time to heal before winter.
Fall herbicide applications can be made now through mid-October. Mowing orchards can help prevent rodent damage over winter.
This time after harvest is also great for sprayer clean-up, repairs, and winterization.
Marquette grapes are approaching harvest, be sure to check Brix and pH in your vineyard to plan for harvest.
For more detailed phenology information on all crops visit Wisconsin Fruit NewsThis article was posted in Fruit Pest Updates.