Vangard^[TM]75WG (cyprodinil, Novartis) is a new anilinopyrimidine (AP) class fungicide that is labeled
on apples for protective and curative activity against scab, but does not possess a label for the
rust diseases or powdery mildew (8).

Sovran^®50W (kresoxim-methyl, BASF Corporation) and Flint^[TM]50W (Trifloxystrobin, Novartis) are
two new strobilurin class fungicides that possess broad-spectrum protective and curative activities
against many of the diseases that effect pome fruits. Although its activity against scab and mildew is

highly effective, Sovran^®50W is not quite as effective against rusts as the sterol inhibitors (9, 10,11).

Flint^[TM]50W is not labeled for control against the rust diseases that affect apples (12).

In a 1998 trial conducted at the Rutgers, Snyder Research and Extension Farm, Procure^®50WS

treatments increased size significantly when compared to Nova^®40W and the untreated control in

packout of fruit between 3.00" and 3.25". These results confirm reports that by utilizing Procure^®
50WS for early season disease control may result in a shift of packout grades to the larger grades (1).

Materials and Methods:
Experiment 1
_____________________________________________________________________
Table 1: Treatments for the Snyder Farm Study_______________________________

TREATMENT #1 -

TREATMENT #2 -

TREATMENT #3 -

TREATMENT #4 -

Untreated control

Procure^®50WS
PLUS

Manzate^®200DF

Sovran^®50W

Flint^[TM]50W

@10 oz/a

@1 lb/100

@3.2 oz/a

@2 oz/a

TREATMENT #5 - Vangard^[TM]75W@5 oz/a
________________________________________________________________________________

A ten-year-old block of Empire apples, on M26, trained to a central leader system was used to
conduct this experiment at the Rutgers University, Snyder Research and Extension Farm in 1999. This
trial was conducted in a randomized complete block design with seven replications and single tree
treatments.

Tree row volume (TRV) was established at 250 gallons per acre dilute (6). The treatments were
applied at 1.5x concentrate (165.3 gpa) using a 400 gallon Rears model Pull-Blast airblast sprayer
retrofitted with a 10' tower, that utilized 15 nozzles per side to apply the treatments. Ceramic TeeJet D2
and D4 disks with size 25 cores were alternated along the spray manifold to produce a uniform spray
pattern from top to bottom. The sprayer was equipped with a constant velocity centrifugal pump that
operates at 170 psi. Output of the nozzles at this constant pressure was calibrated to 0.712 gpm per
nozzle for the D4/25's and 0.395 gpm per nozzle for the D2/25's.

Forward ground speed of the tractor was calibrated to 2.56 mph, and the travel time for each tree was
3.2 seconds per side, for a total of 6.4 seconds/tree per application. High operating pressures and ball
valves in the nozzle bodies assured proper nozzle shut-off, which prevented possible overspray
contamination between treatments.

The Untreated Control received no early season fungicide covers.

1999 North Jersey Tree Fruit Annual Report

26