Red Rice (Oryza sativa) Control and Suppression in Rice (O. sativa)

1991 ◽  
Vol 5 (4) ◽  
pp. 811-816 ◽  
Author(s):  
Sam L. Kwon ◽  
Roy J. Smith ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Plant Growth ◽  
Grain Quality ◽  
Field Experiments ◽  
Red Rice ◽  
Two Cultures ◽  
The Two Cultures ◽  
Rice Yields ◽  
Sequential Treatments ◽  
High Yields

Two field experiments were conducted from 1986 to 1988 to determine efficacy of herbidices and plant growth regulators for red rice control and suppression in water- and drill-seeded rice. Molinate applied PPI with fenoxaprop applied at panicle initiation (PI) of rice controlled 94 and 86% of red rice in water- and drill-seeded rice, respectively, compared with 79 and 49%, respectively, for molinate PPI alone in the two cultures. Although this treatment injured rice slightly (< 30%), rice so treated produced high yields with improved grain quality. Sequential treatments of molinate PPI followed by sethoxydim applied at PI or amidochlor applied at > 90% heading produced comparable rice yields with improved red rice control or suppression and grain quality in both cultures, compared with PPI molinate. Drill-seeded rice treated with molinate PPI followed by fenoxaprop applied at late boot or MH (maleic hydazide) applied 7 d after heading produced higher yield than rice treated with molinate PPI.

Red Rice (Oryza sativa) Control in Drill-Seeded Rice (O. sativa)

Weed Science ◽  
1985 ◽  
Vol 33 (5) ◽  
pp. 703-707 ◽  
Author(s):  
Amadou Diarra ◽  
Roy J. Smith ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Field Experiments ◽  
Growing Season ◽  
Rice Cultivar ◽  
Rice Grain ◽  
Rice Seed ◽  
Red Rice ◽  
Culm Density ◽  
High Yields

Field experiments were conducted to investigate methods of controlling red rice (Oryza sativaL. ♯ ORYSA) in drill-seeded rice (O. sativa). Treatments included the rice cultivar ‘Mars', coated with calcium peroxide (CaO2) at 40% (w/w) and a crop protectant, R-33865 (O,O-diethyl-O-phenyl phosphorothioate) at 0.5 and 1% (v/w). Molinate (S-ethyl hexahydro-1H-azepine-1-carbothioate) at 6.7 kg ai/ha was applied preplant incorporated (ppi). The land was flooded (2.5 to 5 cm deep) after seeding with rice (100 kg/ha, 2.5 cm deep), and the water was maintained throughout the growing season. CaO2, with or without molinate, increased rice grain yield 50% and increased rice culm density fivefold above untreated rice. Molinate applied ppi controlled 96% of the red rice. Rice seed coated with only CaO2or with CaO2plus R-33865 at 0.5%, each combined with ppi molinate, produced 5690 and 6030 kg/ha of grain, respectively. These high yields were associated with red rice control by molinate and good stands of rice provided by O2supplied by CaO2. R-33865 applied to rice seed at 1% (v/w) injured rice by reducing rice culm densities 41%, compared with rice without protectant.

Interference of Red Rice (Oryza sativa) Densities in Rice (O. sativa)

Weed Science ◽  
1991 ◽  
Vol 39 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Sam L. Kwon ◽  
Roy J. Smith ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Rice Plant ◽  
Field Experiments ◽  
Dry Weight ◽  
Rice Cultivars ◽  
Red Rice ◽  
Head Rice ◽  
Reduced Height ◽  
Panicle Number ◽  
Rice Yields

Field experiments were conducted at Stuttgart, AR, from 1986 to 1988 to determine effects of season-long interference of red rice densities of 1, 2, 5, 10, 20, and 40 plants m–2on ‘Lemont’ and ‘Newbonnet’ rice cultivars. This interference reduced straw dry weights of Newbonnet and Lemont by 100 and 130 kg ha–1per red rice plant, and grain yields by 178 and 272 kg ha–1per red rice plant, respectively. Grain yield reductions were due to decreases in panicle number and length, and in number of grains per panicle. Ten plants m–2or more reduced height of Lemont, while 40 plants m−2were required to reduce height of Newbonnet. Red rice at 10 plants m−2or more reduced total milled and head rice yields of Lemont, but red rice did not affect these components for Newbonnet. Red rice interfered with rice, even at densities as low as two plants m−2, and interference was greater in Lemont, a semidwarf cultivar with mature plants 92 cm tall, than in Newbonnet, a conventional cultivar with mature plants 115 cm tall. Red rice produced more panicles m−2and 31 to 64% greater straw dry weight when grown with Lemont than when grown with Newbonnet because red rice shaded Lemont more than Newbonnet. Red rice plants grew taller as red rice densities increased and also were taller when grown in Newbonnet than when grown in Lemont.

Evaluation of Glufosinate on Rice (Oryza sativa) Transformed with the BAR Gene and Red Rice (Oryza sativa)

1997 ◽  
Vol 11 (1) ◽  
pp. 70-75 ◽  
Author(s):  
Sujatha Sankula ◽  
Michael P. Braverman ◽  
Farman Jodari ◽  
Steven D. Linscombe ◽  
James H. Oard
Keyword(s):  
Oryza Sativa ◽  
Water Depth ◽  
Field Studies ◽  
Bar Gene ◽  
Red Rice ◽  
Flood Water ◽  
Rice Yields ◽  
Greenhouse Tests

Glufosinate at 1.1 and 2.2 kg/ha injured ‘Koshihikari’ rice lines that were transformed with the BAR gene from 0 to 53%. However, transgenic ‘Gulfmont’ rice was not injured. Rice yields of transgenic ‘Gulfmont’ lines and six of nine ‘Koshihikari’ lines were not affected by 2.2 kg/ha glufosinate. In field studies, flooding reduced the efficacy of glufosinate in controlling red rice, and greenhouse tests determined that glufosinate efficacy was reduced when red rice was submerged between 25 and 50% of its height. Plant heights and dry weights of red rice increased as flood water depth increased at all rates of glufosinate.

Control and Seedhead Suppression of Red Rice (Oryza sativa) in Soybeans (Glycine max)

1989 ◽  
Vol 3 (2) ◽  
pp. 238-243 ◽  
Author(s):  
Frederick P. Salzman ◽  
Roy J. Smith ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Soil Moisture ◽  
Glycine Max ◽  
Plant Growth ◽  
Growth Regulators ◽  
Moisture Stress ◽  
Growth Stages ◽  
Red Rice ◽  
Soil Moisture Stress ◽  
High Soil Moisture

Experiments were conducted in 1985 and 1986 at three locations in eastern Arkansas to evaluate red rice control in soybeans with postemergence grass herbicides and plant growth regulators applied singly or sequentially at early to late-tillering growth stages of red rice. Haloxyfop at 0.21 kg ai/ha and quizalofop at 0.14 kg ai/ha applied singly or sequentially and fluazifop at 0.21 kg ai/ha applied sequentially consistently controlled red rice and suppressed seedhead production in soybeans. Mid-season treatments were not beneficial when high soil moisture stress conditions existed. Mefluidide or sethoxydim applied singly or sequentially or amidochlor applied singly provided erratic control and seedhead suppression of red rice in soybeans.

Suppression of Red Rice (Oryza sativa) Seed Production with Fluazifop and Quizalofop

Weed Science ◽  
1988 ◽  
Vol 36 (6) ◽  
pp. 800-803 ◽  
Author(s):  
Frederick P. Salzman ◽  
Roy J. Smith ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Seed Production ◽  
Field Research ◽  
Growth Stages ◽  
Red Rice ◽  
Rice Plants ◽  
Stages Of Growth ◽  
Sequential Treatments ◽  
Earlier Application ◽  
Effective Treatments

Field research was conducted in 1985 and 1986 to compare the efficacy of fluazifop and quizalofop on production of panicles and seeds of red rice. Single and first sequential treatments were applied to red rice in the early-tillering, midtillering, and panicle initiation stages of growth. Sequential treatments were applied 14 days after each earlier application to red rice in the midtillering, late-tillering, and early-heading growth stages, respectively. Both herbicides were applied singly or sequentially at 70, 140, and 280 g/ha. Sequential applications of fluazifop and quizalofop at 280 g/ha caused the greatest reduction of red rice panicle and seed production. Fluazifop at 280 g/ha applied sequentially reduced panicle production 75 to 80% and seed production 80%; 140 g/ha applied sequentially reduced seed production 83%. Quizalofop at 280 g/ha applied sequentially reduced panicle production 75 to 100% and seed production 91%. Sequential applications of either herbicide applied to red rice plants in the panicle initiation and early-heading growth stages were the most effective treatments.

Barnyardgrass (Echinochloa crus-galli) and Bearded Sprangletop (Leptochloa fascicularis) Control in Rice (Oryza sativa)

1991 ◽  
Vol 5 (2) ◽  
pp. 337-344 ◽  
Author(s):  
Larry G. Stauber ◽  
Paolo Nastasi ◽  
Roy J. Smith ◽  
Aurora M. Baltazar ◽  
Ronald E. Talbert
Keyword(s):  
Oryza Sativa ◽  
Field Experiments ◽  
High Yields ◽  
Better Than

Field experiments were conducted to compare efficacy of BAS 514, bromoxynil, fenoxaprop, sethoxydim, and triclopyr with standard herbicides for barnyardgrass and bearded sprangletop control in rice at four locations. Sequential applications of BAS 514 and fenoxaprop, or propanil and sethoxydim consistently controlled barnyardgrass and bearded sprangletop as well as or better than standard treatments of propanil, thiobencarb, or pendimethalin alone or combined; and rice so treated produced high yields. BAS 514 applied postemergence alone, BAS 514 applied sequentially with sethoxydim, or BAS 514 tank mixed with propanil controlled barnyardgrass but not bearded sprangletop. Bromoxynil or triclopyr tank mixed with fenoxaprop or sethoxydim antagonized activity on barnyardgrass and bearded sprangletop. Combinations of fenoxaprop with BAS 514 or propanil consistently provided barnyardgrass and bearded sprangletop control and high yields.

A Mycoherbicide Integrated with Fungicides in Rice,Oryza sativa

1988 ◽  
Vol 2 (3) ◽  
pp. 282-285 ◽  
Author(s):  
Khosro Khodayari ◽  
Roy J. Smith
Keyword(s):  
Oryza Sativa ◽  
Field Experiments ◽  
Colletotrichum Gloeosporioides ◽  
Before And After ◽  
Sequential Treatments ◽  
Fungus Development

Field experiments were conducted to determine the effect of selected rice pesticides on the mycoherbicideColletotrichum gloeosporioides(Penz.) Sacc. f. sp.aeschynomene(designated as C.g.a.) for northern jointvetch control in dry-seeded rice. Sequential treatments of pencycuron at 0.56 kg ai/ha, SN-84364 at 0.40 kg ai/ha applied 7 and 14 days after C.g.a., or pencycuron sprayed sequentially after a tank mixture of C.g.a. plus actifluorfen did not reduce infectivity of C.g.a. Also, propiconazol at 0.60 kg ai/ha or pencycuron applied 7 days before and after C.g.a. did not reduce fungus development on northern jointvetch. Sequential treatments of benomyl at 0.56 kg ai/ha or propiconazol applied 7 and 14 days after C.g.a. reduced pathogen activity on northern jointvetch.

Reciprocal Yield Analysis of Red Rice (Oryza sativa) Competition in Cultivated Rice

Weed Science ◽  
1991 ◽  
Vol 39 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Dan J. Pantone ◽  
John B. Baker
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Rice Plant ◽  
Competitive Ability ◽  
Field Experiments ◽  
Yield Losses ◽  
Red Rice ◽  
Cultivated Rice ◽  
Yield Model ◽  
Yield Analysis

Four years of field experiments were used to assess the competitive ability of red rice, a weedy variety of rice, and ‘Mars’, a cultivar of rice. Red rice was the dominant competitor each of the 4 yr, and an average of one red rice plant reduced Mars grain yield per plant equal to the effect of four Mars plants. Intervarietal competition was more important than intravarietal competition for Mars, whereas the reverse was true for red rice. The product of the coefficients for intravarietal competition did not significantly exceed the product of the coefficients for intervarietal competition, indicating that the two varieties were competing for the same resources. Using the reciprocal yield model coefficients from 1989, grain yield losses of Mars, due to red rice densities of 4, 16, 25, and 300 plants m−2, were predicted to approximate 13, 37, 48, and 92%, respectively, at a fixed cultivar density of 100 plants m−2.

Evolving appropriate zinc fertilization strategy for rice-rice (Oryza sativa) cropping system in Cauvery Delta Zone

2019 ◽  
Vol 56 (3) ◽  
pp. 294-304
Author(s):  
C Sharmila Rahale
Keyword(s):  
Oryza Sativa ◽  
Tamil Nadu ◽  
Field Experiments ◽  
Foliar Spray ◽  
Cropping System ◽  
Green Leaf ◽  
Farm Yard Manure ◽  
Zinc Fertilization ◽  
Initiation Stage ◽  
Cauvery Delta

Six field experiments were conducted at Tamil Nadu Rice Research Institute, Aduthurai to evolve suitable zinc fertilization method for rice - rice (Oryza sativa L.) cropping system in Cauvery delta zone. The treatment includes: T1 : Control, T2 : 100 g zinc sulphate (ZnSO4)/cent in nursery alone., T3 : root dipping alone in 2 % zinc oxide (ZnO) solution, T4 : 25 kg ZnSO4 ha-1, T5 : 37.5 kg ZnSO4 ha-1, T6 : 25 kg ZnSO4 ha-1+ Farm Yard Manure (FYM) 12.5 t ha-1, T7 : 25 kg ZnSO4 ha-1 + Green Leaf Manure (GLM) 6.5 t ha-1, T8 : Tamil Nadu Agricultural University Micro Nutrient (TNAU MN) mixture 25 kg ha-1 as Enriched Farm Yard Manure (EFYM), T9 : TNAU MN mixture 37.5 kg ha-1 as EFYM, T10 : Foliar spray of 0.5% ZnSO4 + 1 % urea at tillering and panicle initiation stage, T11 : 100g ZnSO4 /cent in nursery alone + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T2+ T10), T12 : root dipping alone in 2 % ZnO solution + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T3 + T10), T13: 100 g ZnSO4 /cent in nursery alone + root dipping alone in 2 % ZnO solution + Foliar spray of 0.5 % ZnSO4 + 1 % urea at tillering and panicle initiation stage (T2 + T3 + T10). The treatments T5, T6, T7 and T9 were skipped in rabi season to know the residual effect of these treatments in the subsequent season. Among the treatment combinations, application of 25 kg ZnSO4 ha-1 + FYM 12.5 t ha-1 recorded higher grain yield in both kharif (6232 kg ha-1) and rabi (6236 kg ha-1) seasons. The same treatment combination recorded higher Zn content and Zn uptake as well. Regarding soil nutrient content, the same treatment recorded higher N, P and K content. This treatment was followed by application of 25 kg ZnSO4 ha-1 + green leaf manure 6.5 t ha-1. The experimental findings suggested that combination of organic and inorganic sources not only increased the yield but also improves soil health in Cauvery delta zone.

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