March 1984
Horticulture Series No. 31
Auburn 
University
Agricultural Experiment 
Station
Gale A. Buchanan, Dean 
and Director
Auburn University, Alabama
J
y
RESEARCH RESULTS FOR ORNAMENTAL HORTICULTURISTS
FLORISTS CROPS
Horticulture Series No. 31
Alabama Agricultural Experiment Station
Gale A, Buchanan, Director March 1984 Auburn 
University, Alabama
Page
A Brief History of Research Results for Ornamental
Horticulturists. Kenneth C. Sanderson ................
A Comparison of A-Rest, Stemtrol, and B-Nine on
Height Control in Poinsettia. Gary E. Murray,
Kenneth C. Sanderson, and Willis C. Martin, Jr. ............ 
2
An Evaluation of Stemtrol as a Growth Retardant
for Fuchsia hybrida. Kenneth C. Sanderson and
Willis C. Martin, Jr. ......... ........................ 4
Effect of Various Controlled-Release Fertilizers on the
Growth of Ficus benjamina L. Linda Gail Waterhouse,
Kenneth C. Sanderson, Donald Y. Perkins, and John C. 
Williams . . . . 5
Maintaining the Growth of Schefflera Brassaia actinophylla
Endl. with Chemical Inhibitors. Kenneth C. Sanderson and
Willis C. Martin, Jr ..... ........................ 7
Comparison of Agriblend and Other Growth Stimulating
Chemicals on the Growth of Schefflera, Brassaia actinophylla
Endl. Kenneth C. Sanderson and Willis C. Martin, Jr. ... ......... 9

History and Nature of Research Results for Ornamental Horticulturists
Kenneth C. Sanderson
Issue number one of Research Results for Ornamental Horticulturists
(originally titled Research Results for Nurseryman) was authored by
Dr. Tok Furuta in 1960. Since that issue 31 issues have followed. Over
35 authors have contributed to RROH during the past 23 years Dr. Tok
Furuta was the author of most of the early issues. In the 
late 1960's
Dr. Henry P. Orr organized RROH as a part of departmental participation
in the Southern Nurserymen's Association Research Workers Conference.
Dr. Kenneth C. Sanderson assumed the responsibility 
for its publication in
1970. Two author-subject indexes, issues numbered 22 (1976) and 28 
(1982),
have been produced.
RROH has considered a variety of topics of interest to 
ornamental
horticulturists. Some issues were specifically 
targeted to either flori-
culture or woody ornamentals. Many considered cultural practices, pest
control, and marketing. The contents of RROH have been as the name
indicates - research results. Many of the reports 
have been status or
progress reports. The research workers at Auburn 
University have not
always had the opportunity to report to industry and RROH has often had to
substitute for an annual report at a short course. While conclusions 
have
not always been drawn from the research presented, the reader may gain 
an
insight in a problem that is useful. The research methods 
involved may
also contain valuable information.
Complete sets of RROH occur in libraries in England, Germany, and
Taiwan and in major horticultural libraries 
throughout the United States.
2
A Comparison of A-Rest, Stemtrol, and B-Nine on
Height Control in Poinsettia
Gary E. Murray, Kenneth C. Sanderson,
and Willis C. Martin, 
Jr.
Nature or Work: A new foliar spray growth regulator, Stemtrol,
piproctanyl- bromide, (1-allyl-1-1-(3,7-dimethyloctyl)-piperidinium
bromide) has been manufactured by Hoffmann-LaRoche. Piproctanyl-bromide is
a quarternary ammonium derivative. It is manufactured as a liquid concen-
trate containing 5 percent active ingredient plus a wetting agent. It 
has
been reported to demonstrate good growth reduction of chrysanthemums and
certain other ornamentals.
The purpose of this research was to determine the effect of
piproctanyl-bromide, B-Nine (2,2-dimethylhydrazide) and ancymidol
(4 methoxyphenol)-5-pyrimidine-methanol) as foliar sprays on the plant
height and foliage injury of poinsettias.
Cultivars used in this study were 'Annette Hegg', 'C-1 Red', and
'Annette Hegg Diva'. The test was conducted at Auburn University in a
glass greenhouse. Standard cultural practices for commercial poinsettias
were followed on the test plants.
A randomized complete block design with 2 replications, 5 treatments
(table 1) plus a control, and 4 to 6 plants per treatment was used in
applying the growth regulators.
A high pressure-low volume sprayer was used as the applicator. Plants
were sprayed to leaf drip with a fine mist. The volume of spray 
applied
per area is shown in table 1. The plants were sprayed between 
the hours of
9 a.m. and 1 p.m. on November 1, 1977.
Twenty-one days after spraying, the plants' heights were measured
(table 2). Plant height was measured as the distance from the top 
of the
pot to top or apex of the plant. Foliage injury was rated as follows:
(1) 0-20 percent of the leaves burned, (2) 20-40 percent of the leaves
burned, (3) 40-60 percent of the leaves burned, (4) 60-80 percent 
of the
leaves burned, (5) 80-100 percent of the leaves burned. A leaf was
considered burned if 50 percent of its margin was brown to a depth of
1/8 inch from the edge of the leaf.
Results and Discussion: It can be concluded from the results obtained that
piproctanyl-bromide is not an effective growth retardant for poinsettias.
None of the chemicals used greatly reduced stem elongation. 
This could be
attributed to the lateness of the treatment and the short duration 
of the
experiment. Piproctanyl-bromide, however, did not reduce plant height in
the low and medium concentration and only slightly in the high concentra-
tion. Ancymidol was the best material for reducing plant height, followed
closely by B-Nine.
The important results of this experiment are represented by the
foliage damage ratings. Piproctanyl-bromide severely burned the
poinsettias, ancymidol caused some burning, and B-Nine did very little
damage. Although all precautions were taken to avoid drifting, some burn
was exhibited by the control. This, however, was extremely minimal and
could be attributed to leaf contact of the controls and treatments on the
bench after spraying.
Considering both plant height reduction and foliage damage, B-Nine and
ancymidol showed fair responses. These may have been better if an earlier
spray date had been used. Piproctanyl-bromide caused too much foliage
damage and did not sufficiently retard plant growth of poinsettias.
Table 1. Chemicals Used as Foliar Sprays on
Three Varieties of Poinsettias
Treatment Concentration, Amount used
number Chemical p.p.m. oz. per sq. ft.
SStemtrol (1-allyl-1-(3,7-dimethyloctyl)-
piperidinium bromide) 100 0.39
2 150 0.59
3 200 0.54
4 8-nine 5,000 0.43
5 A-Rest (ancymidol) 150 0.41
6 Control
Table 2. Plant Height (inch) and Foliage Injury
Treatment number
1 2 3 4 
5 6
Average Ht. Injury
1
_/ Ht. Injury Ht. Injury Ht. Injury Ht. 
Injury Ht. Injury
Annette Hegg 12.4 2.2
C1-Red 14.4 2.1
Annette Hegg
(Diva)
13.7 2.8
13.5 3.2 12.4 3.3 13.0 0.8 12.2 
0.6 12.7 0.3
14.3 3.1 13.0 2.6 13.7 0.6 
13.0 1.4 13.7 0.3
13.4 3.4 13.2 3.5 12.0 1.1 12.4 1.2 13.7 0.4
Average 13.5 2.4 13.8 2.2 13.0 3.1 12.9 
0.8 12.5 1.1 13.4 0.3
40-60% leaves burned,
i/Foliaqg injury rating: 1 = 0-20% leaves burned, 2 20-40% leaves burned, 3 =
4 = 60-80% leaves burned, and 5 = 80-100% leaves burned.
An Evaluation of Stemtrol as a Growth
Retardant for Fuchsia hybrida
Kenneth C. Sanderson and W. C. Martin, Jr.
Nature of Work: Rooted cuttings (4 per 6 inch pot) of the Fuchsia
cultivars, 'Bagdad', 'Dollar Princess', 'Winston Churchill' and
'Gartenmeister Bonstedt' were transplanted into a 1:1:1 (v/v/v) mixture of
soil:peat moss and bark on September 27, 1977. Prior to steam pasteuriza-
tion, the medium was amended with 0.5 lb. limestone, 0.3 lb. superphos-
phate, and 0.3 lb. gypsum per yd
3
. A weekly application of 20-20-20 liquid
fertilizer was applied to the plants at the rate of 2 lb. per 100 gal. On
November 3, the growth retardants Stemtrol, B-Nine, and A-Rest were applied
to the plants at the rates shown in table 1. Three replications with 4
plants per treatment were used in 'Bagdad' and 'Dollar Princess' tests.
'Winston Churchill' tests were replicated 2 times using 4 plant per treat-
ment. For 'Gartenmeister Bonstedt' tests 3 replications and 3 plants per
treatment were used. The height of the plants was measured on January 18,
11 weeks after treatment.
Results and Discussion: No adverse, visual effects were observed with any
of the growth retardant treatments. At the time of height measurement the
growth retardant effects were being overcome by some plants. Some culti-
vars seem to respond more effectively to certain retardants, especially
Stemtrol. Stemtrol generally caused the greatest reduction in the height
of all cultivars (table 1). Only a few plants were in flower at the end of
the investigation.
Table 1. Height of Four Fuchsia Cultivars
Treated with Growth Retardants
Cultivars height, inch
Spray treatment, Dollar Winston Gartenme i ster
p.p.m. Bagdad Princess 
Churchill Bonstedt
100 Stemtrol 14.6 12.9 10.6 13.0
150 Stemtrol 14.7 13.7 11.0 13.2
200 Stemtrol 13.7 12.3 11.1 13.1
5,000 B-Nine 14.5 12.6 13.8 15.0
150 A-Rest 16.4 13.4 11.8 13.8
None 15.9 12.9 12.8 16.0
5
Effect of Various Controlled-Release Fertilizers
on the Growth of Ficus 
benjamina L.
Linda Gail Waterhouse Kenneth C. Sanderson,
Donald Y. Perkins, and John C. 
Williams
Nature of Work: Foliage plant production research indicates that in most
situations, no single source or level of fertilization 
yields the best
growth. The most common fertilizers used are 
water soluble forms, however
slow release fertilizers are also used. Slow release fertilizer facili-
tates larger single applications of fertilizers, reduces luxury consumption
of nutrients, reduces fertilizer application frequency, reduces labor, 
and
reduces leaching loss and soil fixation of nutrients.
The purpose of this study was to examine the effects of several
experimental controlled slow release fertilizers on the growth and develop-
ment of Ficus benjamina L.
Rooted cuttings of Ficus benjamina L. were potted in 6-in. standard
pots on April 2. Beginning April 16, the plants were fertilized with
liquid fertilizer (Peters 20.ON-8.7P-16.6K) 1477 lb. per acre per year
until the experimental fertilizers were applied on August 20.
The test fertilizers used included Precise, 12.0N-2.6P-5.0K, an
encapsulated source of the 3 primary nutrients in the form of an aqueous
solution of urea, ammonium superphosphate, and muriate of potash manufac-
tured by 3M Company, Minneapolis, Minn.; Scott Pro-Grow 25.0N-4.4P-8.3K and
Scott's impregnated vermiculite 
18.ON-3.9P-7.5K, 20.ON-2.2P-8.3K,
16.ON-1.7P-10.OK, 20.ON-2.2P-4.2K, and 15.0ON-8.7P-4.2K manufactured by
0. M. Scott Company, Marysville, Ohio; Mag-Amp 7.0N-17.4P-4.1K, a combina-
tion of co-granulated magnesium ammonium phosphate and magnesium potassium
phosphate manufactured by W. R. Grace, Co., Clarksville Md., and Osmocote
14.0N-6.1P-11.6K (a plastic resin coated inorganic water soluble fertilizer
manufactured by Serria Chemical Co., Milpitas Calif.). The slow release
fertilizers were spread uniformly over the medium surface of the pots.and
water was applied. Liquid fertilization, Peters 20.ON-8.7P-16.6K, was
applied at the rate of 1,378 per acre per year. Treatments were replicated
6 times in a randomized block design.
The medium was a 1:1:1 (v/v/v) mixture of sand, sphagnum peat moss,
and pinebark. Added amendments consisted of 0.8 lb. dolomite, 0.2 lb. Perk
and 0.1 oz. Aquagro (a nonionic wetting agent, manufactured by Aquatrols,
Inc., Pennsauken, N.J.) per yd
3
. The experiment was conducted in a glass
greenhouse cooled through the summer by evaporative pads. The plants were
maintained under natural daylight at approximately 2,365 ft-c.
Height data were recorded after 4 months. Heights of the plants were
made by measuring from the pot rim to the terminal meristem. Two leaves
from new growth were taken from each plant to compare leaf color using a
Hunterlab color difference meter.
A visual rating of plant appearance was made using a rating scale
ranging from 1 to 4. A rating of 1 indicated an unacceptable plant, one
that was stunted and chlorotic. A rating of 4 indicated a healthy, dark
green plant with a full spreading habit. A rating of 3 or 2 indicated
plants between desirable and unacceptable.
After the visual rating, the plants were cut at the medium surface and
placed in paper bags for drying to measure dry weight. The bags were dried
in a forced draft oven at 70 to 80
0
C for 48 hours.
Results and Discussion: Heights, dry weights, visual ratings, and green
leaf color (table 1) of plants fertilized with high rates of several
controlled-release fertilizers and Scott Pro-Grow 25.0N-2.2P-8.3K were
equal or better than results with Precise and Osmocote 14.0N-6.1P-11.6K.
Mag-amp 7.ON-17.4-4.1K plants at rates of 1,045 and 784 lb. per acre per
year performed poorly in all growth parameters measured. Liquid fertiliza-
tion, 20.ON-8.7P-16.6K, applied at the rate of 1,378 lb. per acre per year
did not yield better growth than high rates of slow release fertilizers
surface applied at the beginning of the experiment.
Results of this study reveal that when several different types and
formulations of controlled-release fertilizers are applied at the rate of
1,045 lb. per acre per year similar growth of Ficus benjamina L. is
produced. Also a single application on a surface broadcast, controlled-
release fertilizer can produce plant growth equal to that obtained with
applications of water soluble liquid fertilization every 2 weeks.
Table 1. Height, Dry Weight, Visual Ratings, and Hunter Color Difference values of
Ficus benjamina L. Fertilized with Various Controlled Release Fertilizers
Yearly rate, Plant height, 
Green color,
Fertilizer N-P-K lb. per acre inch Dry weight, g Visual ratingl
/  
tan-I a/b
Mag Amp 7.0-17.4-4.1 1,045 19.8bcd2/ 22.03de 1.33g -5.7fg
7.0-17.4-4.1 784 18.1cd 18.45ef 1.0Og -4.lfg
Osmocote 14.0-6.1-11.6 1,045 22.2abc 26.07a-d 2.17f 3.9cde
14.0-6.1-11.6 784 22.3abc 24.68b-e 2.33ef 0.Oefg
Precise 12.0-2.6-5.0 1,045 21.4a-d 28.17a-d 2.50ef 12.4a-d
12.0-2.6-5.0 784 19.8bcd 24.17cde 2.33ef 9.6a-e
Scott 15.0-8.7-4.2 1,045 22.0abc 31.60ab 3.00b-f 12.4a-d
15.0-8.7-4.2 784 24.9a 31.08abc 2.83c-f 6.8b-e
16.0-1.7-10.0 1,045 21.0Oa-d 27.57a-d 3.50abc 17.4a
16.0-1.7-10.0 784 21.8abc 30.70abc 2.67def 6.2b-e
18.0-3.9-7.5 1,045 23.8ab 32.02ab 4.00a 9.6a-e
18.0-3.9-7.5 784 21.8abc 30.38abc 3.OOb-e 8.5b-e
20.0-2.2-4.2 1,045 20.5a-d 30.02abc 3.67ab 15.1ab
20.0-2.2-4.2 784 19.6bcd 25.43bcd 3.00b-e 6.2b-e
20.0-2.2-8.3 1,045 23.2ab 31.42abc 2.50ef 7.9b-e
20.0-2.2-8.3 784 23.1ab 31.17abc 2.50ef 5.7b-e
25.0-4.4-8.3 1,045 22.Oabc 32.90a 2.83c-f 11.9a-d
25.0-4.4-8.3 784 20.6a-d 29.58abc 2.33ef 2.9def
Peters Liquid 20.0-8.7-16.6 22.2abc 28.32a-d 3.33a-d 13.Oabc
Check 17.3d 13.82f 1.OOg -6.2g
rating of 3
color and a tall,
unacceptable
21
Means followed by the same letter(s) are not significantly different according to Duncan's 
multiple range test.
1/A visual rating of 4 indicates a dark green color, full spreading habit, and nonspindly growth. A
indicates medium to light green color and some spindliness. Rating 2 is indicative of light qreen
spindly habit. Rating I indicates yellowish green to yellow color, short plants, thin growth, and
plants.
Maintaining the Growth of Schefflera Brassaia actinophylla
Endl. with Chemical Inhibitors
Kenneth C. Sanderson and Willis C. Martin, Jr.
Nature of Work: Tropical trees and shrubs are widely used in interior
landscapes where they soon become overgrown and unkept looking. Reducing
the size of the overgrown plants can be accomplished by pinching and
pruning but this changes the appearance of the plant and the landscape,
reduces attractiveness, and is expensive. Cost of maintenance of interior
landscape plants is accelerated by the plants' rapid growth habits and
labor and material required for frequent prunings and replacement. The
object of this research was to find an effective growth retardant for
schefflera, Brassaia actinophylla Endl., a very popular interior landscape
tree.
Twenty-seven chemicals, including growth retardants, growth inhibi-
tors, cytokinins, morphactins, and ethylene compounds, were applied to
Brassaia plants growing in 6-inch pots on July 24, 1980 (table 1). The
chemicals were applied as sprays at the rate 1.3 oz of spray per plant. A
surfactant, Plyac, was added to each spray at the rate of 13 oz./100 gal.
Concentrations of the chemicals used were determined from manufacturers
recommendations and previous research. Ethrel (ethephon) was also combined
with several of the other chemicals to test the additive effect of Ethrel
observed in other growth regulator work. Three plants were used as an
experimental unit in a randomized block design having 4 replications.
Plants were grown in an air-cooled greenhouse with the thermostat set at
72
0
F and an irradiance of 6,000-8,000 ft-c. Fertilizer was applied to the
plants every 2 weeks using 2 lb./100 gal. of 20-20-20 water soluble
material. The height of the plant from the pot rim to the plant terminal
was determined on September 12.
Results and Discussion: None of the chemicals tested significantly reduced
the growth of Brassaia (table 1). There was a trend for the growth
retardants, 8-Nine and A-Rest, to cause some reduction (10%) in growth,
however the rates used were extremely high and their use at higher rates
would not be economically feasible and maybe phytotoxic. Higher rates of
MBR 18337 merit investigation. A safe, nonphytotoxic, growth inhibitor for
woody plants is still needed if the growth of most interior landscape
plants is to be chemically controlled.
8
Table 1. Height of Schefflera, Brassaia actinophylla EndI.
Following Spray Treatment with Various Chnemical s
Treatmenti!/ Common name Rate, p.p.m. Plant height, inch
Check
Cytokinin
6-benzyinopurine
6-furfurylaminopurine
Ethylene com
Ethrel
Growth retardants
A-Rest
B-Nine
CycocelI
B-Nine + Cycocel
Stemtrol
Growth inhibitors
Atrinal
Embark
Embark
KBR 18337
MBR 18337
Morphactins
Maintain CF-125
BAY 102612
BAY 102613
SAY 102614
Ethrel (E) combination-s
E + N-.6BA
E + A-Rest
E + B-Nine
E + Stemtrol
E + Embark
E + Embark
E + MBR 18337
E+BAY 102612
E + BAY 102613
E + BAY 102614
N-6BA
Kinetin
Ethephon
Ancymidol
Daminozide
Chlormequat
Dikegul ac
Melfluidide
Melfluidide
Chl or f1 urenolI
500
500
500
500
500
500
500
500
500
500
500
100
1, 000
133
10,000
3 ,000
5,000 + 1,500
250
3,000
960
920
480
960
50
50
50
50
250
67
5,000
125
480
960
240
25
25
25
31 2/bc~
31. 17abci
32.S5ab
30. 2a-od
27. 3dc
28. lbcd
30. 3a-d
27.Sdc
30.2 a-d
29.0,1 a-d
32. 2 ab
29.3a-d
29.4a-d
27.Gdc
31. 0Oabc
33.2a
29.9 a-d
30.8ga-d
30.2a-d
29.6 a-d
30. 2 a-d
29.l1a- d
29.5 a-d
28, 8a-d
29.6 a-d
29.6a-d
30. 7 a-d
b/Approximately 1.3 oz. of spray applied per plant.
?/'Means followed by the same l etterls) are not significantly different according
Duncan's multiple range test.
ocelitors
Comparison of Agriblend 
and Other Growth Stimulating 
Chemicals
on the Growth of 
Schefflera, Brassaia 
actinophylla Endl.
Kenneth C. Sanderson 
and Willis C. Martin, 
Jr.
Nature of Work: 
Chemicals that stimulate 
plant growth include 
auxins, gib-
berellins, and cytokinins. 
Recently, attention 
has centered on cytokinins,
growth regulators that 
increase cell division. 
Several natural cytokinin
products have been 
introduced for use 
on agricultural crops. 
Aqua 10
Agriblend, a seaweed 
concentrate containing 
100 p.p.m. cytokinins 
and manu-
factured by the Aqua 
10 Corp., Beauford, 
N.C. is such a natural 
cytokinin.
The object of the 
present study was to 
compare Agriblend with 
an auxin,
gibberellic acid, 
and 2 cytokinins on the 
growth of schefflera, 
Brassaia
actinophylla Endl.
Schefflera seedlings 
were transplanted into 
6-inch pots containing 
a
1:2 (v/v) builders sand 
and sphagnum peat moss 
medium on June 10, 1980.
Prior to transplanting, 
the medium was amended 
with 3.6 oz. limestone,
1.5 oz. Perk minor nutrient 
additive, 1.5 oz CaNO3 and 
1.5 oz. granular
Aqua-Gro wetting agent 
per ft
2
. Fertilization consisted 
of 2 lb./100 gal.
of 20-20-20 water soluble 
fertilizer every 2 weeks. 
Plants were grown in 
a
lightly shaded, evaporative-cooled 
greenhouse. On July 
9 and August 27,
stimulating treatments 
were applied as sprays 
(3.3 oz. per ft
2
) and
drenches (3 oz. per 
pot). Sprays consisted 
of 100 p.p.m. each 
of
Agriblend, NAA (napthaleneacetic 
acid), KGA (potassium salt 
of gibberellic
acid), N-6BA (6-benzylaminopurine, 
a cytokinin), and kinetin
(6-furfurylamino-purine, 
a cytokinin). DuPont 
spreader sticker was added
to all sprays at the rate 
of 13 oz./100 gal. Agriblend 
drenches were
applied at the rate of 
2 oz./100 gal. or 6 p.p.m. 
The other chemicals were
applied at a concentration 
of 100 p.p.m. Six plants 
were used as an
experimental unit in randomized 
block design having 5 replications. 
Data
on plant height and 
dry weight were recorded 
October 8, 1980.
Results and Discussion: 
One week after the second 
application, leaves of
plants drenched with NAA 
appeared very distorted. 
Plant receiving the
N-6BA spray showed some 
distortion. Minor leaf 
burn and destruction of
terminal tissue was observed 
on KGA sprayed plants. 
Plants drenched with
N-6BA exhibited dwarfing 
first, one week after application.
Drenched plants were shorter 
than sprayed plants. The 
heights and dry
weights of plants drenched 
with NAA were significantly 
less than those of
other drenched plants (table 
1). KGA-sprayed plants 
were taller than
Agriblend-, Kinetin-, N-6BA-, and NAA-sprayed 
plants. Generally, Agriblend
treatments were similar 
to the other treatments except 
NAA drenches and KGA
sprays; however, Agriblend 
plants did not differ from 
check plants.
Results with Agriblend confirm 
results (unpublished) by 
the authors with
gloxinia, Sinnigia speciosa 
Benth and Hook. Only KGA 
sprays showed any
promise as a growth stimulating 
treatment for schefflera. 
Further research
is warranted on various antilogs, 
concentrations, and phytotoxicity 
of GA
on schefflera and other 
tropical foliage plants 
if there is a need for
growth stimulation.
10
Table 1. Height and Dry Weight of Schefflera Brassaia actinophylla Endl.
Plants Treated with Growth Stimulating Drenches and Sprays
Height, inch Dry weight, g
Chemical treatmentl
/  
Drench Spray Drench Spray
Height (cm)
Aqua 10 Agriblend 9.5a 9.5b 7.9a 7.7a
KGA 10.2a 12.1a 7.9a 9.1a
Kinetin 9.5a 9.2b 7.1a 7.7a
NAA 7.2b 8.7b 5.2b 6.7a
N-68A 10.6a 9.2b 8.3a 7.5a
1/A11 drenches and sprays applied at the rate of 100 p.p.m. except for Agriblend which
was applied at 6 p.p.m. Dren hes consisted of 3 oz. of material per 6-inch pot.
Sprays applied 3.3 oz. per ft.
2/Means followed by the same letter(s) are not significantly different 
according to
Duncan's multiple range test.

Y