In both grower trials Nova^®40W (myclobutanil, Rohm and Haas) was the alternate sterol inhibitor

fungicide with which Procure^®50WS was being evaluated against. Both treatments contained

Polyram^®80DF (United Agri Products, Inc.) as the EBDC protectant fungicide. Treatments were
applied with a 400-gallon diesel powered FMC airblast sprayer calibrated to 117 gallons per acre.
Based on tree row volume calculations this block of trees computed at 300 gallon per acre. However
the grower always reduces his dilute volume to 117 GPA with historical success. Because of his
excellent pruning techniques combined with good air drainage due to site location, relatively low
disease pressure was present. As a result the standard spray schedule followed for the growing season
by our grower cooperator had reduced application rates by nearly two fold.
________________________________________________________________________________
Table 3: Treatments for Best Fruit Farm Study_______________________________

TREATMENT #1

Procure^®50WS
PLUS

Polyram^®80DF

10 oz/a

2 lb/100 @ 117 gpa = 2.34 lb/a

TREATMENT #2 Nova^®40W2 oz/100 @ 117 gpa = 2.34 oz/a
PLUS

Polyram^®80DF2 lb/100 @ 117 gpa = 2.34 lb/a
_____________________________________________________________________

Applications began on 30 April for both trials, and continued throughout the primary scab season. No
fungicides were applied to the either trial prior to this date. The final spray was applied on 29 May,
which correlated to 2^ndcover in the Warren County area and the end of primary scab season. Four
applications were applied for both treatments. All treatment applications contained Nitrogen (N-Sure, 1
pint/100), Boron (Borasol, 1 pint/100), and Zinc (Zinc Chelate, 1 pint/100) to maintain tree nutrition.

Table 4: Application Timings for Best Fruit Farm Study.

_Application_

Application #1

Application #2

Application #3

Application #4

Application Date

Stage of Growth

30-April

10-May

21-May

29-May

Pink

Petal Fall

1st Cover

2nd Cover

The only fungicides applied for summer diseases to the entire block through the remainder of the

season were the protectant fungicides Ziram 76DF and Topsin^®M WSB in combinations. Insecticide
sprays and summer covers were maintained with the Rutgers IPM pest control schedule as determined

by weekly scouting and Skybit^®predictions.

A single application of 50 ppm NAD (Amid Thin W, Amvac Chemical) was used on 16 May to thin

the MacSpur's^®when they were at the 9 mm stage. Due to a light fruit set, no chemical thinning

treatments were applied to the Starkrimson's^®in 1999.

Results and Discussion:
Experiment 1

A 200 fruit subsample per single tree replication was harvested. Fruit were randomly selected from the
center 2/3's of each tree harvested, as measured form top to bottom. Fruit was then placed in cold
storage (33ºF, 95% RH) until evaluated on 28 October. Data collected included: total yield, packout
grades, stem-end split ratings, percent fruit infection of powdery mildew and scab, and average fruit

1999 North Jersey Tree Fruit Annual Report

28