|
Experiment 1: The treatments were selected based on the Northeast Plant Growth Regulator
group's protocol for 1999. Tree row volume (TRV) was measured at 250 gallons per acre dilute.
All treatments, except endothall, were applied dilute (250 gpa) using a 400 gallon Durand-Wayland
model 1500 airblast sprayer. Endothall was applied at 3x concentrate (85 gpa). Treatments were
applied at a speed of 2.8 MPH at 250 PSI as calibrated.
Three treatment limbs per tree were selected based on uniform bloom. Limbs were flagged and
bloom clusters per limb were counted and limb cross-sectional area measured. Fruit counts per
treatment limb were made following June drop.
The untreated control received no chemical or mechanical thinning agents during the 1999-growing
season.
|
 |
|
|
NAA7.5 ppm (adjusted to TRV)
Sevin XLR Plus1 pt / 100(adjusted to TRV)
Apply as a single tank mix spray at 8 - 10 mm stage
Accel30 gm(ai)/a (not adjusted for TRV)
Sevin XLR Plus 1 pt / 100(adjusted to TRV)
Spray Oil 6E1 qt / 100(adjusted to TRV)
Apply as a single tank mix spray at 8 - 10 mm stage
Sevin XLR Plus 1 pt / 100(adjusted to TRV)
Spray Oil 6E1 qt / 100(adjusted to TRV)
Apply as a single tank mix spray at 8 - 10 mm stage
|
|
|
The block of trees in this experiment had
good pollination with an adequate bloom
period (+7 days) with one day of 75% full
sunlight, at 65ºF plus. On 6 May, the trees
were at 75% Full Bloom, and at 12:00 PM,
the endothall (treatment#1) was applied.
Conditions during the application were 65ºF,
overcast with 2-3 mph wind out of the NW.
On 20 May, the average combined fruit size
of the four remaining treatments was 9.5 mm
King Fruit. Treatments 2-4 were applied the
next morning, on 21 May. Warm
temperatures (+70ºF) the day of treatment
and the following two days with near full
sunlight provided good weather conditions
for treatment drying and uptake.
|
|
|
1
2
3
4
5
6
