Mississippi Rice Variety Trials, 2003

Transcription

1 Mississippi Rice Variety Trials, 00 Dwight G. Kanter, Agronomist MAFES, Delta Research and Extension Center Stoneville, Mississippi Theodore C. Miller, Agronomist Tri-M Agronomics, LLC Leland, Mississippi Joe E. Street, Rice Specialist MSU Extension Service/MAFES Delta Research and Extension Center Stoneville, Mississippi This research was partially funded by Mississippi Rice Promotion Board funds. Don Respess and Tommy Baird, county agents of the Mississippi State University Extension Service, participated in site selection of some of the on-farm tests. The authors offer special thanks to the cooperating producers who voluntarily provided the land for conducting these tests and for the production inputs during the crop season. These tests are an inconvenience for field operations, and their patience is sincerely appreciated. The authors also appreciate the assistance of several MAFES staff members at the Delta Research and Extension Center: research associates George Baird III and Walter L. Solomon; agricultural technicians Shari Murphree and Sanfrid D. Shaifer; and agricultural aide Brinda Frazier. The assistance of Pat Gerard, MSU Experimental Statistics, is also appreciated. For more information, contact Dwight Kanter at (66) 686-9; , Information Bulletin 9 was published by the Office of Agricultural Communications, a unit of the Mississippi State University Division of Agriculture, Forestry, and Veterinary Medicine.

2 Tunica Clarksdale Cleveland Blaine Stoneville Hollandale Rolling Fork Rice Variety Trial ON-FARM TEST LOCATIONS (Mississippi Delta shaded)

3 Mississippi Rice Variety Trials, 00 INTRODUCTION In 00, approximately, acres of rice were planted in Delta counties of Mississippi compared with 68,666 acres planted in 00. Bolivar County had the highest planted acreage at 7,80 acres. Essentially all the production in Mississippi was from long-grain rice. Cocodrie was the predominate variety grown in the Mississippi Delta this year, occupying 67% of the rice acreage followed by Priscilla at %, Clearfield 6 at %, Wells at %, and other varieties at %. The on-farm rice variety tests represent the final step in the yield evaluation program before a variety is released for commercial production in Mississippi. Conducting these tests on commercial farms across the Delta provides important information on variety performance and adaptability under diverse environmental and management conditions. These test locations give a partial sampling of actual production situations in the Delta, where practically all Mississippi rice is produced. These multiple locations also permit evaluation of entries for resistance to pests and/or other field related stresses, which often have a greater natural incidence at locations other than at the Delta Research and Extension Center (DREC). There was no observed incidence of blast at any of the test locations. The incidence of sheath blight at on-farm test locations ranged from low to moderate in 00. False smut was observed at some test locations at very low infestation levels. Kernel smut was not observed at any of the on-farm tests. Planting dates for the different locations ranged from April to April 0, which are within the typical period for planting rice in the Delta. Three tests (Cleveland, Stoneville, and Hollandale) were planted into conventionally prepared seedbeds, and the other four were planted into stale seedbeds. Early-season showers relieved the need for flushing to obtain a stand at most test locations. Light to moderate sheath blight infection developed on susceptible entries at the Cleveland and Blaine sites. Soil samples were taken at planting within the test area at each location. All results indicated nutrient levels were medium to high at all locations. The medium phosphorus levels at Tunica, Cleveland, and Blaine were sufficient for normal rice production. Variety selection is one of the most important decisions a rice producer makes in preparing production plans each season. The information in this bulletin is intended to help the producer with this decision-making process. In addition to the yield performance of a variety, consideration needs to be given to whole grain and total milling percentages, maturity, lodging, and disease reactions. Data summarized over locations and years are generally a more reliable measure to show future variety performance than individual test results. Other sources of information may include past production experience with a particular variety and consulting with local and state rice Extension personnel. Mississippi Agricultural and Forestry Experiment Station

4 TEST PROCEDURES The 7 long-grain varieties and breeding lines reported here were included in the variety test planted at each of the seven locations. Each test consisted of four replications. All plots consisted of six rows drill-seeded at an equivalent seeding rate of 08 pounds per acre at a depth of approximately inch. The 0% higher seeding rate was used to compensate for the limited seed treatment applied to the experimental lines planted in the tests and possible harsh seedbed conditions. Cultural practices were decided by and were performed by the cooperator and varied by location. Overall, the tests were grown under field conditions of high productivity. The three hybrids were not fertilized according to recommendations under these test conditions. Therefore, their yields may be lower than normal. The field management practices applied for each location are recorded in the footnotes of Tables -7. [Note: Readers who may be less familiar with pesticide formulations and application rates may wish to refer to pesticide product label information available on the web or to the 00 Weed Control Guidelines for Mississippi (Mississippi State University Extension Service/Mississippi Agricultural and Forestry Experiment Station Pub. No. )]. Agronomic data were collected at appropriate times during the season. Sheath blight ratings were obtained on a plot-wise basis at six locations. Less-than-favorable conditions for optimum disease development in the blast nursery delayed data collection. Therefore, blast data was not available at the time this bulletin was prepared. Sodium chloride was applied to the entire field at Clarksdale making it impossible to collect maturity and disease ratings. Plots were handharvested, and standard procedures were used in processing the samples for grain and milling yield determinations. Readers may refer to MAFES Information Bulletin 8, 99 Rice Variety Trials, dated March 99, for further details on experimental procedures. Statistical analyses were performed on the yield data for each location. The data combined over the seven locations were analyzed using the SAS PROC-GLM procedure. The least significant difference (LSD) for yield at the % probability level has been included in the tables to aid in comparing varieties. If the yields of any two varieties or lines differ by more than the LSD value, it can be concluded that the variety with the higher yield is superior to the variety with the lower yield. The coefficient of variation (CV) provides a general indication of the level of precision of each variety test. Lower CV values indicate greater reliability of the test. LSD and CV values are reported in the footnotes of the first nine tables. RESULTS The field performance of each variety in the seven individual tests is presented in Tables -7. Sheath blight ratings are listed in the location and summary tables (Tables, -7, 0, and ). Average test yields ranged from 6 bushels per acre at Cleveland to 0 bushels per acre at Rolling Fork (Table 8). The CV s for grain yields at all locations were within an acceptable range in 00. Grain milling yields were lower at Blaine than at all other locations. This may have been caused by several factors, such as glyphosate drift, draining the field too early, stinkbug damage, and other unknown localized environmental or soil factors. Rough rice, total, and whole-grain milling yields were higher in 00 than they were in 00. There were generally no stand problems in the tests except at Hollandale. Straighthead and blast were not observed in any of the on-farm tests. Table 8 provides a seven-location summary of grain yields for the eight varieties and nine experimental lines. The experimental hybrid, XP-70, at 9 bushels per acre, significantly outyielded all other varieties and experimental lines for average grain yield across all seven on-farm locations (Table 0). Francis significantly outyielded all varieties and experimental lines except MS0Y, Wells, and Cheniere. Numerically, Cheniere produced more whole-grain milled rice than all other varieties and lines in the tests. Cheniere is a new high-yielding long-grain variety with good to excellent milling quality and lodging resistance released by Louisiana in 00. Cheniere is reported to be moderately resistant to the straighthead disorder and susceptible to rice blast and sheath blight diseases. Priscilla continues to be a high-yielding variety that averaged 9 bushels per acre in the 00 on-farm tests and has averaged 8 bushels per acre over 9 years. Priscilla also has good disease and lodging resistance. Its average whole-grain milling yield is slightly lower than some of the other commercial varieties. Cocodrie continues to be a high-yielding variety and continues to have excellent milling quality. CL6 is a new variety that is tolerant to the herbicide Newpath that controls red rice. CL6 has more tolerance to Newpath than its predecessors CL and CL. However, it yielded less than all other varieties and lines reported in this bulletin. Average values for milling and agronomic characteristics for all locations are also summarized in Table 0. Head rice yields are reported to convey a variety s overall performance in terms of whole-grain milled rice produced per acre. Six varieties and experimental lines produced more head rice per acre than Francis, and eight produced more per acre than Wells (Table 0). Breeding line MS0Y performed well at most test locations. When averaged over all seven locations, MS0Y yielded 9 bushels per acre more than Priscilla. Mississippi Rice Variety Trials, 00

5 Lodging resistance should be seriously considered when selecting a variety to grow. This is especially important when it occurs before fields are normally drained or when rainy weather persists before harvest. Lodging was light to severe with most occurring at the Rolling Fork, Cleveland, and Hollandale locations (Tables, 6, and 7). The varieties that lodged the most in the 00 on-farm variety tests were XL-8 (%), Clearfield XL-8 (9%), Francis (%), and XP-70 (%) (Table ). Lodging among the hybrid entries may have resulted from the fertilizer being applied prior to the early heading period as recommended. The long-term performance of varieties in the onfarm tests is presented in Table. Three-year and multiyear averages are indicated for individual varieties. Data averaged over several years are generally more reliable for predicting variety performance for yield and other characteristics. Average grain yields in 00 for the commercial varieties were numerically higher than the 00 yields. The performances of commercial rice varieties included in other yield trials conducted at the Delta Research and Extension Center are reported in Table 9. The column labeled average grain yield indicates the performance of individual varieties for all years they were included in these tests since 98. Individual varieties have been tested for different numbers of years. The -year yield average compares varieties from 000 to 00. The yield data includes both standing and lodged plants, as the plots were hand-harvested. Important consideration should be given to the lodging data as an indication of straw strength. Efficiency in combine harvesting requires varieties with lodging resistance, particularly when adverse weather conditions may occur as the crop ripens and matures. Information on disease reactions of individual varieties is presented in Table. The nitrogen fertility guidelines for commonly grown commercial varieties in Mississippi are provided by Tim Walker and Joe Street and are presented in Table. Table. Performance of long-grain rice varieties and lines grown on Sharkey-Alligator clay soil near Tunica, Tunica County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % Francis Wells MS0Y XP XL Priscilla MS0Y Cocodrie Cheniere MS0Y MS0Y Clearfield XL MS0Y MS0Y MS0Y CL MS0Y Planting date: April 6. Emerged: April 8. Herbicides: Roundup at pt/a + Command at gallon to 7 acres on April 7; Aim at oz/a on May ; Facet at 0. lb/a plus Permit at 0. oz/a on June 6. Fertilizer: Urea at 0 lb/a and ammonium sulfate at 00 lb/a on May ; urea at lb/a on June 8. Permanent flood: May. Insecticide: Karate Z at gallon to 70 acres on May 0 and August. Fungicide: Propimax at 6 oz/a on July 8. Drained field: August 9. Rough rice at % moisture. A difference of 9 bu/a is required for one variety to differ from another at the % probability level. C.V. = 6.8%. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with the upper leaves visually infected. Mississippi Agricultural and Forestry Experiment Station

6 Table. Performance of long-grain rice varieties and lines grown on Alligator clay soil near Clarksdale, Coahoma County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % MS0Y XP MS0Y MS0Y Priscilla Francis MS0Y Cheniere MS0Y XL Wells Cocodrie MS0Y MS0Y MS0Y CL Clearfield XL Planting date: April 6. Emerged: May. Herbicides: Touchdown at. pt/a on April ; Command at gallon to 6 acres on April 7; Touchdown at. pt/a on April ; Bolero at pt/a plus Permit at 0. oz/a on May ; Regiment at 0. oz/a on May. Fertilizer: Unity at lb/a on April 0; urea at 00 lb/a on May 6, and 00 lb on June 0. Permanent flood: May 6. Insecticide: Icon treated rice seed planted; Karate Z at gallon to 80 acres on July 8. Fungicide: Quadris at gallon to 0 acres on August ; sodium chlorate at lb/a on September. Drained field: August. Rough rice at % moisture. A difference of 6 bu/a is required for one variety to differ from another at the % probability level. C.V. =.8%. Days after emergence. Sodium chlorate was applied on September at lb/a before maturity and sheath blight ratings were taken. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. Table. Performance of long-grain rice varieties and lines grown on Sharkey clay soil near Cleveland, Bolivar County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g XP Cheniere MS0Y MS0Y Francis MS0Y MS0Y XL Clearfield XL MS0Y Cocodrie MS0Y Wells Priscilla MS0Y MS0Y CL Planting date: April. Emerged: April 0. Herbicides: Command at gallon to 6 acres plus ammonium thiosulfate at 0 gal/a on April 6; --D amine at pt/a on June 6. Fertilizer: Urea at 70 lb/a on May and 0 lb/a on June 6. Permanent flood: May 6. Fungicide: Propimax at oz/a on July. Drained field: August. Rough rice at % moisture. A difference of 9 bu/a is required for one variety to differ from another at the % probability level. C.V. = 8.8%. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. Mississippi Rice Variety Trials, 00

7 Table. Performance of long-grain rice varieties and lines grown on Sharkey clay soil near Blaine, Sunflower County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % XP Clearfield XL MS0Y Cheniere Francis MS0Y XL Cocodrie MS0Y MS0Y CL MS0Y Wells Priscilla MS0Y MS0Y MS0Y Planting date: April. Emerged: April 7. Herbicides: Roundup plus Command at gallon to 8 acres each on March 6; Facet at 0. lb/a on May. Fertilizer: DAP at 00 lb/a on April 9; at lb/a on May and May ; urea at 00 lb/a on June 9 and June 6. Permanent flood: May. Insecticide: Methyl paration at gallon to 6 acres on July 6. Drained field: July. Rough rice at % moisture. A difference of 0 bu/a is required for one variety to differ from another at the % probability level. C.V. = 8.%. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. Table. Performance of long-grain rice varieties and lines grown on Tunica clay soil near Stoneville, Washington County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % XP Francis Wells Clearfield XL Cocodrie MS0Y XL MS0Y Cheniere Priscilla MS0Y MS0Y MS0Y MS0Y MS0Y MS0Y CL Planting date: April 0. Emerged: May 7. Herbicides: Facet at 0. lb/a plus Stam at. lb/a plus Prowl at 0.8 lb/a on May ; Arrosolo at lb/a plus Stam at.7 lb/a plus Permit at 0. oz/a on June 9. Fertilizer: Ammonium sulfate at 60 lb/a on June 0; urea at 0 lb/a on July 0. Permanent flood: June 0. Drained field: September 8. Rough rice at % moisture. A difference of 6 bu/a is required for one variety to differ from another at the % probability level. C.V. = 6.%. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. Mississippi Agricultural and Forestry Experiment Station

8 Table 6. Performance of long-grain rice varieties and lines grown on Sharkey clay loam soil near Hollandale, Washington County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % XP MX0Y Francis Wells MS0Y Cheniere MS0Y Cocodrie MS0Y Clearfield XL MS0Y XL Priscilla MS0Y MS0Y CL MS0Y Planting date: April 6. Emerged: May. Herbicides: Command plus Roundup at gallon to 6 acres each on April 0; Grandstand at 0. pt/a plus Permit at 0. oz/a on June ; Clincher at oz/a on June. Fertilizer: Ammonium sulfate at 00 lb/a on May ; urea at 00 lb/a on June, June 8, June 6, and July. Date flushed: May. Permanent flood: June. Insecticide: Fury at gallon to 0 acres on June ; Mustang Max at gallon to acres on July 0. Fungicide: Stratego at oz/a on July 6. Drained field: August 8. Rough rice at % moisture. A difference of 7 bu/a is required for one variety to differ from another at the % probability level. C.V. = 9.7%. Days after emergence Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. Table 7. Performance of long-grain rice varieties and lines grown on Sharkey clay soil near Rolling Fork, Sharkey County, Mississippi, 00. Variety Grain Milled Milling yield Bushel Plant 0% Maturity Lodging 000 Sheath or line yield head Total Whole weight height heading seed blight rice weight bu/a lb/a % % lb in days days % g % Wells Francis MS0Y Priscilla MS0Y MS0Y XP Cocodrie MS0Y Cheniere XL MS0Y MS0Y Clearfield XL MS0Y MS0Y CL Planting date: April. Emerged: April 7. Herbicides: Roundup at 6 oz/a plus,-d at qt/a on March ; Roundup at 0 oz/a plus Permit at 0. oz/a plus Command at gallon to acres on April ; Stam 80EDF at lb/a plus Aim at 0.7 oz/a on April 8; Permit at 0. oz/a plus Aim at 0.7 oz/a on May 0; Clincher at oz/a on June 6. Fertilizer: Urea at 0 lb/a on May, 00 lb/a on June 8 and June. Date flushed: May 6 and. Permanent flood: May 8. Insecticide: Karate Z at gallon to 66 acres on June 6 and July. Drained field: August. Rough rice at % moisture. A difference of 9 bu/a is required for one variety to differ from another at the % probability level. C.V. = 6.8%. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. 6 Mississippi Rice Variety Trials, 00

9 Table 8. Average rough rice yields of long-grain varieties and lines evaluated in on-farm tests at seven locations, 00. Variety Location Average or line Tunica Clarksdale Cleveland Blaine Stoneville Hollandale Rolling Fork bu/a bu/a bu/a bu/a bu/a bu/a bu/a bu/a XP Francis MS0Y Wells Cheniere XL MS0Y Cocodrie Clearfield XL Priscilla MS0Y MS0Y MS0Y MS0Y MS0Y MS0Y CL Mean LSD CV % Date Planted /6 /6 / / /0 /6 / Table 9. Annual and average grain yields and agronomic characteristics of long-grain commercial varieties grown at the Delta Research and Extension Center, Stoneville, Mississippi, Variety Origin Grain yield Years Milling yield Plant 0% Lodging Bushel 00 Avg. -yr avg. in test Total Whole height heading weight bu/a bu/a bu/a no. % % in days % lb Ahrent AR Cheniere LA Cocodrie LA <. Cypress LA Dellrose TX Dixiebelle TX Francis AR <.0 Jefferson TX Lemont TX Priscilla MS Saber TX Wells AR Dellrose = long-grain aromatic. Origin: AR = Arkansas, LA = Louisiana, MS = Mississippi, TX = Texas. Mississippi Agricultural and Forestry Experiment Station 7

10 Table 0. Average agronomic and milling performance of long-grain varieties and lines grown at seven on-farm locations, 00. Variety Origin Average yield Milling yield Bushel Plant 0% Maturity Lodging 000 seed Sheath Approximate or line Rough rice Head rice Total Whole weight height heading weight blight seed/pound bu/a lb/a % % lb in days days % g no. XP-70 RT Francis AR MS0Y MS Wells AR Cheniere LA XL-8 RT MS0Y09 MS Cocodrie LA Clearfield XL-8 RT Priscilla MS MS0Y07 MS MS0Y MS MS0Y08 MS MS0Y9 MS MS0Y MS MS0Y0 MS CL6 HA Mean LSD CV % Origin: AR = Arkansas, HA = Horizon Ag., LA = Louisiana, MS = Mississippi, RT = RiceTec, TX = Texas. Rough rice at % moisture. Days after emergence. Weight of 000 kernels at % moisture. Sheath blight percent is an estimation of the percent plot area with upper leaves visually infected. 8 Mississippi Rice Variety Trials, 00

11 Table. Annual and average grain yields along with agronomic and milling data averages of rice varieties and lines grown in the Delta on-farm tests from 997 to 00. Variety Grain yield -year Total Milling yield Bushel Plant Days to Lodging 000 Sheath or line Avg. avg. tests Total Whole weight height Heading Maturity seed blight 6 weight bu/a bu/a bu/a bu/a bu/a bu/a bu/a bu/a bu/a no. % % lb in no. no. % g Lemont Cypress Priscilla Jefferson Cocodrie Madison Wells Saber <.6. CL Francis Cheniere RiceTec XL RT/CLFD XL Test locations were in farmers fields extending from the northern to the southern Delta area. Rough rice at % moisture. Data columns for 989 to 996 were omitted, but their numbers were included in the average yield and total test numbers. Average for 000 to 00. Values for milling and agronomic characteristics are accumulated means over all years of testing. Weight of 000 kernels at % moisture. 6 Average sheath blight scores using 0 (least susceptible) to 9 (most susceptible) scale from selected tests since 997 with moderate or higher disease severity. Mississippi Agricultural and Forestry Experiment Station 9

12 Table. Reactions of rice varieties to common diseases. Variety Blast Sheath Kernel Straight Brown Narrow Leaf Stem False blight smut head leaf spot brown smut rot smut leaf spot Cheniere S S MR CL6 MS VS VS MS S Cocodrie MR VS VS S MR MR MS S S Cypress MR VS VS MS MR R S S S Dixiebelle MS VS MS MS MS S Francis S MS S MS Jefferson S MS S MR R MR MR MS MR LaGrue S S VS MS R MR R MS S Lemont MR VS MR MR R S S MS MS Madison R VS R MS R MS R MS MS Priscilla MS MS S MR R MR MR S S RiceTec XL-8 R MS RiceTec CLFD XL-8 R MS RiceTec XP-70 R MR Saber R S MR MR MR MR Wells S MS MR MS R MS S Abbreviations: R = resistant, MR = moderately resistant, MS = moderately susceptible, S = susceptible, VS = very susceptible. Note: These ratings are subject to change should new or other information become available. Table. Nitrogen fertility rate guidelines. Cultivar Clay soils Silt loam soils Total Preflood Midseason Total Preflood Midseason First Second First Second lb/a lb/a lb/a lb/a lb/a lb/a lb/a lb/a Cheniere Cocodrie CL Dixiebelle Francis Priscilla Wells XL XL CL-XL For recently leveled silt loam soils leveled within years, apply the same rates as you would for clay soils. The midseason N application for RiceTec s hybrid varieties are applied in one application at booting to % headed. 0 Mississippi Rice Variety Trials, 00