Healthy Fruit, Vol. 26, No. 23, September 25, 2018 - Apple Maturity Report

Jon Clements, Author (unless otherwise noted) and Editor

Contents

The way I see it

Horticulture/Apple Maturity Report

Guest article

Thank you sponsors…
NIFA wants to hear from you...

The way I see it

Jon Clements

More slog weather. 1.32 inches rain yesterday in Belchertown. 7.13 inches in past 30 days. Dew point 70 as I write this. A brief fall intro last weekend, more to come. No frost/freeze in forecast, and the 30-day outlook (as of September 20) calls for an equal chance of above or below normal temperatures.

Honeycrisp are pretty well picked at the UMass Orchard (unless they had ReTain), Cortland and Macoun being actively worked on. Some late Macs (Rogers) left to pick. Flavor, quite frankly, has been a bit bland, too much water.

Disease issues continue to be a bit onerous. Sooty blotch and flyspeck showing up regularly, and suspicious case of leaf spotting on Fuji that I suspect is Marssonina. Significance not clear, but I don’t like it...if anyone else is seeing similar (see pict below) I’d like picts and variety from you.

Finally, NIFA wants to hear from you: https://nifa.usda.gov/nifalistens And see the NIFA Listens slides at the end of this Healthy Fruit.


Sooty blotch and flyspeck on Morning Mist Fuji, 26-September, 2018


Suspect Marssonina infection of Fuji leaves, 26-September, 2018

Horticulture (apple maturity report)

Jon Clements

Note that apple maturity report also continuously updated here: http://ag.umass.edu/fruit/resources/apple-maturity-reports

Date

Variety

Drop

Diameter
(inches)

Color
(% red)

Firmness

(lbs)

Brix

Starch Index

DA Meter

Comments

Picture

9/26/18

Morning Mist Fuji

nil

3.5

65

12.6

11.8

7.5

0.87

Variable maturity depending on crop load, ready for 1st pick

9/26/18

Jonagold

nil

3.5

70

14

13.2

5 to 7.5

0.69

Some water core; ready for 1st pick, very nice

9/26/18

Rogers Red McIntosh

yes

3.5

65

13.6

12.2

6 (5 to 7)

NA

Final call for CA McIntosh

9/26/18

Macoun

some

3.1

70

17.5

11.6

3 to 4, maybe more

NA

Could use a little more time on tree for brix to be over 12

9/26/18

Cortland

nil

3.5

75

15.7

12.5

3 to 4, don’t starch test well

NA

Bitter pit, may have had ReTain

9/25/18

Honeycrisp

some

3.4

60

12.8

11.4

0.71

0.71

Flavor is bland, likely had ReTain

9/20/18

Modi

few

3

90

19.2

13.4

4 (1.5 to 6)

1.15

Sweet and crisp; ready to pick, but maturity is variable; too bad we can’t grow this scab-resistant one!

9/20/18

Liberty

none

3

90

21.5

10.9

2 to 3, one a 6

NA

Needs another week

9/13/18

Rogers Red McIntosh

nil

3.4

50 dull

15.6

11.4

5 (4 to 6)

NA

Rogers is a late McIntosh, could use another week on tree for sure for red color

NA

9/13/18

Honeycrisp

nil

3.1

55

14

10.8

2 to 7, big range

0.89

Over-cropped Honeycrisp = poor quality apples

NA

Guest article

Harvesting apples in the heat

The starch iodine test doesn’t tell the whole story...

September 19, 2018 - Author: Randy Beaudry, Michigan State University Extension Fruit & Nuts

We are beginning to assess the maturity of some of the traditional “October” apples in the Michigan State University Apple Maturity Program. I have been surprised by the high starch index of some of these varieties that we normally do not expect to see ripening for another two to three weeks (e.g., Red Delicious, Cortland, Mutsu). The ethylene levels, however, are very low—in the parts-per-billion range! This suggests to me that, unlike our earlier apples like Honeycrisp and Gala, which should be headed out of the orchard in the southern half of Michigan, the later varieties are suffering from heat-based dilution of the starch. Read the full article here...

Useful links

UMass Fruit Advisor: http://umassfruit.com

Scaffolds Fruit Journal: http://www.nysaes.cornell.edu/ent/scafolds/

Network for Environment and Weather Applications (NEWA): http://newa.cornell.edu

Follow me on Twitter (http://twitter.com/jmcextman) and Facebook (http://www.facebook.com/jmcextman)

Acimovic Lab at Hudson Valley

Peter Jentsch's Blog

The next Healthy Fruit -- if there is one, otherwise see you next year -- will be published on or about October 16, 2018. In the meantime, feel free to contact any of the UMass Fruit Team if you have any fruit-related production questions.

Thank you sponsors…

Orchard Equipment and Supply Company, Inc. Conway, Massachusetts

Nourse Farms