.00 Belle Glade AREC Research report EV-193-2 January, 193
Si 1982 Rice Performance Trials
David B. Jones, Rice \Aronomrist
George H. Snyder, Soil Chemist
; .... le Glade, Florida 33430
Rice performance trTlaTre conducted at three locations in the Everglades
Agricultural Area (E. A. A.) in 1982. The trials were grown at the following
locations: Seminole Sugar Company, Brida farm, approximately 1 miles east of
Belle Glade; A.R.E.C., 3 miles east of Belle Glade; and Gulf and Western Company,
Okeelanta farn, approximately 20 miles southwest of Belle Glade.
A total of 9 varieties and 4 experimental lines were tested. The 9 varieties
were tested at all three locations, while the 4 experimental lines were tested at
A.R.E.C. only, Table 1. Of the 9 varieties, three (LaBelle, Lebonnet and Mars)
have been commonly grown in the E.A.A., and served as check varieties. Bellemont
and Leah are recently released, short saturated, mid-season long grain varieties.
Three varieties S-201. M-201 and L-201, were from California. LA 110 is a mid-
Sseason, semi-dwarf medium grain variety from Louisiana. LA 110 dees not meet
typical milling or cooking quality standards for rice cultivars grown in the United
States due to chalkiness and high percent amylose of grain endosperm. The intended
use of LA 110 is solely for industrial purposes, primarily as brewers rice to be
grown under contract. Four experimental lines which have shown promise in previous
testing in other states were included at the A.R.E.C. test for the first time this
All tests were drill seeded at a seeding rate of approximately 110 Ibs/A.
Standard cultural practices of the area were used on all tests. The soils in the
E.A.A. have a very high organic matter content (ca. 85%) and therefore no nitrogen
fertilization is required. If flooding is not maintained during the growing season,
oxidation of the organic matter can lead to excessive \M fertility.
The growing season could be considered near average with regard to temperature,
Appendix Table 1. Rainfall was in excess of average. There were no tropical storms
or hurricanes during the growing season, therefore lodging was not a significant
production factor. Only one variety, LA 110, showed any tendency to lodge, which
it did at all locations.
All plots consisted of G rows spaced 8 inches apart. Four rows were harvested
using a snall plot combine. Plot length varied between locations being 20 ft. at
Seminole, 13 ft at A.R.E.C. and 32 ft at Gulf and Uestern tests.
Yields were poor at the Seminole test, averaging only 1932 lbs/A, Table 2.
This was a direct result of the incidence of the blast disease (Pyricularia oryzae).
The variety that had the highest yield, LA 110, also had the lowest disease rating.
This relationship between the amount of disease and yield held over varieties (r2 =
0.75). Therefore, although this test was a poor indicator of potential yield of
the varieties, it was a good indicator of their inherent disease resistance. The
three California varieties S-201, :-201 and L-201 were all very susceptible to blast.
This can be expected of most varieties originating from California since they are
bred and selected in the absence of the disease. It should be noted, however, that
with the proper fungicide program, it is possible these varieties would produce
quite well in Florida. Further testing is needed before these varieties are tried
on a commercial basis.
ilars, the medium grain variety from Arkansas, had good blast resistance and
yielded quite well as a result. Of the long grain varieties, Lebonnet and Leah
yielded the best and had intermediate blast scores. Bellemont, the long grain short
stature variety from Texas, had the highest blast score of the Southern varieties.
A visual rating was taken of damage to plants caused by the application of the
herbicide propanil. The only variety that had significantly less damage than the
others was Dellernont. This result can be attributed to the slow seedling growth of
Bellemont. Bellemont had less leaf area than the other varieties at the time of
propanil application. Therefore, this score doesn't necessarily reflect superior
tolerance to the herbicide by Bellemont, but rather an avoidance of damage in this
Unlike the Seminole test, the A.R.E.C. test was relatively disease free.
Therefore, the grain yields at this location more closely reflect the actual yielding
abilities of each variety, Table 3. The rean yield for the test was 3991 Ibs/A with
a range from 4847 to 2495 Ibs/A. The California variety, L-210, had the highest
yield with an experimental line, UYN-045, next highest, although the varieties
Lebonnet, Mars, LA 110, Leah, S-201 and the experimental lines UYNF-007, UYN-015,
and UYN-043 all had statistically similar yields. Even though the incidence of blast
was very low at the A.R.E.C. test, the variety I-201 was still affected by the
disease. This indicates the extreme sensitivity of this variety to blast. All four
of the experimental varieties performed well throughout the season, and warrant
further testing. The experimental line UY;I-007 appears particularly promising for
several reasons. Its yield was equal to the standard varieties Lebonnet and Labelle.
It is very early in maturity which is a desirable trait for the ratoon cropping that
is practiced widely in the E.A.A. And finally, it is short statured, an important
trait for a variety grown in an area where lodging frequently occurs.
All varieties and experimental lines had acceptable stand establishment ratings
except for the experimental line UYN-015.
Gulf and Hestern
The yield performance of the varieties tested at the .ulf and eIstern location
was intermediate of the other two test locations, Table %. Again, blast was present
to some degree, indicated by the poor yield of the highly susceptible variety 11-201.
Therefore, as at the Seminole location, varieties having better disease resistance
performed better than the more susceptible varieties. LA110 performed very well
yielding 5885 Ibs/A despite partial lodging in most plots. rlars, also did well,
yielding 4709 Ibs/A. Of the long grained varieties, Lebonnet, Labelle, Leah and
L-201 all performed equally well, having yields better than 3000 Ibs/A.
Stand establishment ratings were taken one week after planting. This early
rating gave more separation between varieties for this character than the six week
rating taken at A.R.E.C. This rating gives a relative comparison of the rapidity
of emergence of the varieties tested. All varieties achieved excellent stands by
the time the permanent flood was applied.
The summary of yield performance of the nine rice varieties that were tested
at three locations in the E.A.A. is presented in Table 5.
LA 110 ranked first with an overall yield of 4761 lhs/A. This variety had
excellent resistance to blast which partially explains its superior yielding per-
formance. Although LA 110 is sormiewhat shorter than Lebonnet and Labelle, it still
had a tendency to lodge. This is a major disadvantage for this variety. LA 110
is also of limited use because of its grain quality, thus making it useful only as
an industrial variety.
The variety plars ranked second in yield. Hlars is a tall, medium grain, mid-
season variety. liars is a vigorous variety, having good seedling vigor and stand
establishment characteristics as well as excellent lodging and blast resistance. In
other words, it seems to perform iiell under adverse conditions and will do well
with minimum management input. The riajor disadvantage of liars is that it is a
medium grain variety and therefore has a limited market in the area.
The varieties S-201, Leah, Lebonnet and L-201 all had very similar overall
yields, ranking 3rd, 4th, 5th and Cth, respectively. Lebonnet is already widely
grown in the area and has consistently performed well. It has acceptable blast
resistance and good ratooning capabilities. In the ratoon crop, several commercial
fields of Lebonnet were severely damaged by sheath bliaht (Rhizoctonia solani).
This is something that should be followed closely over the next few years.
Leah is a very promising short stature long grain variety. Resides yielding
well, it has acceptable plant vigor and blast resistance. It also has excellent
lodging resistance. The ratooning ability of this variety is yet unknown. The only
disadvantage of Leah is that it has lower milling yields (% head rice) than Lebonnet
and Labelle. This advantage may be more than compensated for by its superior lodging
The California varieties S-201 and L-201 also shoti good yield potential. All
of the California varieties tested are very susceptible to blast, and therefore, if
they are grown, special precautions must be taken to protect them from this disease.
Their regrowth after harvest has also been poor and it is suspected that their
ratoon yields will be lot. But, these varieties are short-seasoned and have excellent
lodging resistance. These facts, combined with high plant crop yield potential,
if managed properly, would make them possible choices for a grower who has a limited
time to produce a rice crop. L-201 is probably more acceptable than S-201 since the
former is a long grained variety, and therefore has a better market potential.
Labelle is ranked 7th with a yield of 230O Ibs/A. The major advantages of
Labelle over Lebonnet is that it is 7-10 days earlier in maturity and has better
The performance of Bellenont, a short stature lono grained variety, vas dis-
appointing this year. In the past, Bellemont has had yields equal to Labelle and
Lebonnet. This year the incidence of blast ':as greater than it had been in the past.
Since Bellemont seems to have less blast resistance than Lebonnet and Lahelle, blast
was probably responsible for its poor yield performance this year. Bellenont also
has poor stand establishment characteristics. It is very sensitive to seedin"
depth, and if planted too deep (more than 0.5 inch) stands nay be unsatisfactory.
Therefore, Dellemont appears to be a variety that requires superior management
practices if it is to perform well.
H-201, a California medium grain short stature variety, ranked last with a
yield of 1240 Ibs/A. This low yield can be attributed entirely to its blast
susceptibility. Leaf blast was observed on H1-201 at the Seminole location less
than 60 days after planting. The disease incidence was so severe that some plots
were completely killed prior to heading. Because of i-201's extreme sensitivity to
blast, it probably will not be an acceptable variety for the E.A.A.
Genoral description of rice varieties ant location
Everglades Agricultural Arf-a in 12S2.
tested in the
State Locati on
Plant Grain of Gulf I
Variety Heighti/ :iturityy Typed/ Orinin Seminole A.R.E.C. Western
Bellemont S Ii L TX X X X
Lebonnet T E L TX X X X
Labelle T VE L TX X X X
F.ars T 1 iI ARK X X X
LA 110 ii i LA X X X
Leah S ii L LA X X X
S-201 S E S CA X X X
H-201 S VE i1 CA X X X
L-201 ii VE L CA X X X
UYII-045 i I1 L ARK X
UYH-007 S VE L AR X
UYIJ-015 T H L TX X
UYil-043 S Ui L TX X
1/ S = Short, 30-35 inches, I0 = nediun, 3G-40 inches, T = Tall, 41 + inches
tall at maturity.
2/ VE = Very early, E = early, i = midseason.
3/ S = Short, !I = medium, L = long.
Performance of rice varieties at Seminole Sugar (Brida), 1902.
1/ Rough rice at 12% moisture.
/ Days from planting (4/6/82) to head emergence of 50% of the plants in
3/ Percent of the stand infected with blast (Pyricularia oryzae) at harvest.
4/ A visual rating on a scale of 0 (no vigor, all plants damaged) to 10
5/ Values followed by the same letter are not significantly different at
p = 0.05.
Table 3. Performance of rice varieties at A.R.E.C.,
Belle Glade, FL, 1982.
Yield! Days to
1/ Rough rice at 12% moisture.
/ Days from planting (4/15/82) to head emergence of 50% of the plants in
3/ A visual rating of stand density from 0 (no plants) to 5 (100% stand)
taken on 6/1/82.
4/ Values followed by the same letter are not significantly different at
p = 0.05.
Table 4. Performance of rice varieties at Gulf and lWestern, Okeelanta,
Acre (Ibs) -
I/ Rough rice at 12% moisture.
/ Days from planting (4/21/82) to head emergence of 50% of the plants
in the stand.
3/ A visual rating of stand density from 1 = 10% emerged to 10 = 100%
emerged taken on 4/28/82.
4/ Values followed by the same letter are not significantly different
at p = 0.05.
Table 5. Yields of rice varieties tested at 3 locations in the Everglades
Agricultural Area, 1982.
Table 1. Comparison of 1982 and 57 year mean maximum and minimum temperatures
and rainfall data for the EAA rice growing season.