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NE-183 Multidisciplinary Evaluation of New Apple Cultivars


Supported by Allotments of the Regional Research Fund
Hatch Act, as Amended August 11, 1955
January 1, 1999 to December 31, 1999

Winfred P. Cowgill, Jr.*, Professor
Department of Agricultural and
Resource Management Agents
Rutgers Cooperative Extension
Flemington, NJ 0882

Jeremy Compton
North Jersey Tree Fruit Technician
Snyder Research and Extension Farm
140 Locust Grove Rd.
Pittstown, NJ08867

Dean Polk
Associate Professor and IPM Fruit Agent
Department of Agricultural and
Resource Management Agents
Rutgers Cooperative Extension
Cream Ridge, NJ 08514

Progress of the work and principal accomplishments

Robert D. Belding
Extension Specialist in Pomology
Dept. of Extension Specialists and Plant Science
Rutgers Research and Extension Center
121 Northville Road, Bridgeton NJ 08302

William H. Tietjen, Associate Professor
Department of Agricultural and
Resource Management Agents
Rutgers Cooperative Extension
Belvidere, NJ 07823

Joseph C. Goffreda
Associate Professor - Fruit Breeding
Department of Plant Science, Foran Hall
Rutgers, The State University
New Brunswick NJ 08903

1995 Planting:

The 1995 planting of the Northeast Cooperative Regional Project (NE-183) Apple Cultivar Evaluation

was established at the Rutgers, Snyder Research and Extension Farm in Pittstown, NJ. The New Jersey trial

is one of the horticultural plantings. Growth characteristics and extensive data collection on fruit quality

were measured. All 1999 data has been collected except for fruit harvest and quality data for Goldrush,

which was not mature at the writing of this report. For 1999, tree leaders remained unheaded. Some of

the more vigorous cultivars, such as Cameo and Gingergold, have filled their space and are approaching

the maximum height that should be allowed by this training system. This was the third fruiting year for

this trial in our planting. The crop load was moderate to heavy. Extremely mild temperatures during

February and into the month of March caused the trees to break bud about two weeks early this spring.

Colder than average temperatures dominated most of the month of April into May, which slowed bud

advancement, and allowed bloom to settle into the traditional window for our region. A moderate to

heavy bloom, coupled with three days of full sun and warm temperatures during bloom provided

adequate pollination conditions. The first thinning application was done at petal fall to 10mm stage with
7.5ppm NAA and 2/3 pt/100 Regulaid
TM. A follow up application of 1 qt. Sevin XLRTMPlus/A and

10ppm NAA was made 6 days later when the fruit stages fell between 6 - 15 mm. No hand thinning was

performed in 1999.

Based on soil, leaf analysis and as per protocol, 30 lb./a (actual) N (broadcast) was soil applied to all

cultivars. Also applied were 2 foliar applications of Zinc Chelate (1qt./100), 2 foliar applications of
TM(1 lb./100), 1 foliar application of Manganese Sulfate (4 lb./100), and 2 foliar applications of

Magnesium Sulfate (15 lb./100). 1999 was one of the driest seasons on record. Trickle irrigation began
on May 18
thand was repeated on a 7-day schedule through September 14 to supply 1" of water weekly.

1999 North Jersey Tree Fruit Annual Report