Control of Volunteer Glyphosate-Resistant Soybean in Rice

2009 ◽  
Vol 23 (2) ◽  
pp. 225-230 ◽  
Author(s):  
Jason A. Bond ◽  
Timothy W. Walker
Keyword(s):  
Production System ◽  
Field Studies ◽  
Rice Production ◽  
Application Rates ◽  
Second Year

Two field studies were conducted in 2007 and 2008 to evaluate at-planting burndown and POST herbicide applications targeting volunteer glyphosate-resistant (GR) soybean in rice. In the burndown study, paraquat, glufosinate, and a thifensulfuron plus tribenuron mixture were applied immediately after rice seeding. Paraquat controlled volunteer GR soybean at least 95% at all evaluations both years. Control with glufosinate was greater in 2007 than 2008 due to rainfall that occurred following application the second year. The thifensulfuron plus tribenuron mixture provided similar control in both years, but control never exceeded 71%. Additionally, a study was conducted evaluating POST-applied rice herbicides including propanil (4,480 and 2,240 g ai/ha), triclopyr (420 and 210 g ai/ha), bispyribac-sodium (38 and 19 g ai/ha), penoxsulam (40 and 20 g ai/ha), and halosulfuron (70 and 35 g ai/ha). Control across all POST herbicides and application rates was equivalent (> 95%) 28 and 56 d after application except for propanil, which controlled volunteer GR soybean less than other treatments. Volunteer GR soybean can be effectively managed in a rice production system with at-planting burndown or POST herbicide applications in rice.

Pendimethalin Applications in Stale Seedbed Rice Production

2009 ◽  
Vol 23 (1) ◽  
pp. 167-170 ◽  
Author(s):  
Jason A. Bond ◽  
Timothy W. Walker ◽  
Clifford H. Koger
Keyword(s):  
Production System ◽  
Rice Yield ◽  
Field Studies ◽  
Rice Production ◽  
Seedling Vigor ◽  
Rice Cultivars ◽  
Seedling Density ◽  
Application Timing ◽  
Emulsifiable Concentrate ◽  
Capsule Suspension

Field studies were conducted from 2005 through 2007 to determine the response of three rice cultivars (‘Cocodrie’, ‘Wells’, and ‘Lemont’) to three application timings and two formulations of pendimethalin in a stale seedbed rice production system. Pendimethalin formulated as an emulsifiable concentrate and capsule suspension was applied to rice 0, 3, and 7 d after planting. No visual injury was detected for any cultivar. Seedling density, days to 50% heading, and rice yield were not affected by pendimethalin formulation or application timing. The practice of planting cultivars with excellent seedling vigor into nondisturbed soils with greater available moisture could provide an opportunity to use pendimethalin as a preemergence herbicide for rice production.

scholarly journals Quackgrass (Elytrigia repens) management in flax (Linum usitatissimum)

2000 ◽  
Vol 80 (2) ◽  
pp. 411-417 ◽  
Author(s):  
David A. Wall ◽  
Marjorie A.H. Smith
Keyword(s):  
Perennial Grass ◽  
Field Studies ◽  
Research Centre ◽  
Annual Grass ◽  
Weed Growth ◽  
Application Rates ◽  
Elytrigia Repens ◽  
Nitrate Fertilizer ◽  
Second Year ◽  
Glyphosate Formulations

Field studies were conducted at the Agriculture and Agri-Food Canada, Research Centre, Morden, Manitoba from 1992 to 1996 to evaluate quackgrass management in flax with several graminicides applied at annual and perennial grass rates, and with preharvest glyphosate applied after postemergence graminicides. All graminicides at both application rates reduced quackgrass biomass. However, at annual grass rates, clethodim and sethoxydim were sometimes less effective at controlling quackgrass than quizalofop and fluazifop-P. There was some evidence that annual-rate applications of sethoxydim can result in increased quackgrass regrowth in the second year. Flax seed yields were not affected by the use of graminicides at annual grass rates compared with perennial grass rates, whereas untreated (weedy checks) flax had yield losses of up to 67% compared with weed-free plots. The use of preharvest glyphosate reduced second-year regrowth of quackgrass by half or more, compared with no preharvest glyphosate treatment. Where preharvest glyphosate had been applied, the weedy checks tended to have markedly less quackgrass regrowth than where graminicide treatments had been applied in the spring. This suggests that use of spring-applied graminicides may reduce the effectiveness of preharvest glyphosate to control quackgrass. However, use of a postemergence graminicide is often necessary to control annual grasses as well as quackgrass because flax yield is seriously affected by uncontrolled weed growth. A second experiment was conducted to compare the efficacy of liquid and dry formulations of glyphosate applied with water and 28-0-0 fertilizer as carriers. The three glyphosate formulations applied at 0.9 kg a.e. ha−1 were equally effective at reducing quackgrass biomass in flax without yield loss, but at 0.45 kg a.e. ha−1, the liquid formulation was sometimes less effective. There was no consistent evidence that the use of liquid urea/ammonium nitrate fertilizer as a carrier, rather than water, affects the performance of either liquid or dry glyphosate formulations. Key words: Quackgrass, flax, graminicides, glyphosate, preharvest application

N credit of soybean to a following corn crop in central Ontario

1998 ◽  
Vol 78 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Wu Ding ◽  
D. J. Hume ◽  
T. J. Vyn ◽  
E. G. Beauchamp
Keyword(s):  
Field Studies ◽  
Fertilizer N ◽  
Quadratic Regression ◽  
Corn Crop ◽  
Glycine Max L ◽  
Second Year ◽  
Yield Responses ◽  
N Rates ◽  
Key Words Nitrogen ◽  
Corn Grain

Field studies were conducted to determine the nitrogen (N) fertilizer replacement value (NFRV) when soybean (Glycine max [L.] Merrill) preceded corn (Zea mays L.) in the rotation (S-C), compared to corn preceding corn (C-C). Large, replicated blocks of soybean and corn were established in 1993 and 1994 near Elora, Ontario. In the following year, each large block was subdivided into smaller plots. Fertilizer N was applied at six rates from 0 to 200 kg N ha−1 to the second-year corn crop. Corn grain yield responses to fertilizer N were fitted by quadratic regression. Maximum economic rate of N was calculated for each crop sequence and NFRV's were determined. Corn yields were consistently higher when grown after soybean (S-C) than after corn (C-C). Maximum corn yields were 10.4 and 12.3 Mg ha−1 in 1994 and 1995, respectively. NFRVs for S-C, compared to C-C, were 41 and 59 kg N ha−1 in the two years. As a result of these studies and numerous other experiments, recommended fertilizer N rates have been changed to 30 kg N ha−1 less for S-C than for C-C in central Ontario. Key words: Nitrogen credit, corn, soybean, fertilizer N, replacement value, crop rotation

scholarly journals PRODUCTIVITY OF PERENNIAL GRASSES AND MIXTURES WITH DIFFERENT SOWING DATES IN WESTERN SIBERIA

2020 ◽  
pp. 24-32
Author(s):  
V. A. Petruk
Keyword(s):  
Dry Matter ◽  
Crop Yields ◽  
Growing Season ◽  
Single Species ◽  
Field Studies ◽  
Perennial Grasses ◽  
First Year ◽  
Sowing Dates ◽  
Second Year ◽  
Sowing Period

The results of field studies for 2017 - 2019 are presented. yields of perennial grasses sown at different times of the growing season. Spring, summer, and winter sowing periods were compared. Alfalfa, clover, rump, and also their mixtures were sown in 2017 under the cover of barley. The value of the cover crop yield of spring and summer sowing periods did not differ significantly and amounted to 4-5 t / ha of absolutely dry matter. Winter barley crops have not formed. On average, over 2 years of use, the highest yields were observed in alfalfa-crust grass mixtures - 3.4 t / ha of absolutely dry matter. The lowest yield was obtained in the single-species seeding of the rump. Correspondingly, in the spring, summer and winter periods of sowing, the yield of rump was 1.6; 1.1 and 1.3 t / ha. With a late sowing period, the yield of perennial grasses is significantly lower compared to spring and summer. With winter sowing periods, the yield was the highest for grass stands of alfalfa and alfalfacrust grass mixture - 2.3 and 2.4 t / ha. It should be noted that in the second year of use, the yield by the sowing dates in single-species crops and grass mixtures is leveled. The winter crops of perennial grasses in the first year of use formed a low yield. Only in the second year (third year of life) the productivity of perennial grasses of winter sowing began to increase. Consequently, in the area under perennial grasses of the winter sowing period, during one growing season (the next year after sowing), the crop was not actually formed. Based on the data obtained, production can be recommended for spring and summer planting of perennial grasses under the cover of barley. The winter sowing period provides economically valuable crop yields only by the third year of life.

Evaluation of Herbicide Options for Alligatorweed (Alternanthera philoxeroides) Control in Rice

2015 ◽  
Vol 29 (4) ◽  
pp. 793-799 ◽  
Author(s):  
Samuel D. Willingham ◽  
Muthukumar V. Bagavathiannan ◽  
Katherine S. Carson ◽  
Todd J. Cogdill ◽  
Garry N. McCauley ◽  
...  
Keyword(s):  
United States ◽  
Weed Control ◽  
Field Studies ◽  
Rice Production ◽  
Alternanthera Philoxeroides ◽  
Southern United States ◽  
Rice Grain ◽  
Effective Management ◽  
Invasive Weed ◽  
Antagonistic Interactions

Alligatorweed is a perennial, invasive weed in southern United States rice production, but knowledge on effective management of this weed is limited, especially in conventional (non-imidazolinone-resistant) rice fields. Field studies were conducted in multiple environments in southeastern Texas to evaluate different herbicide options involving penoxsulam, propanil, triclopyr, halosulfuron, bispyribac-sodium, bensulfuron, and quinclorac for alligatorweed control in conventional drill-seeded rice when applied at early POST (EPOST), late POST (LPOST), or both. Among the herbicide options evaluated, penoxsulam alone (up to 83%), penoxsulam plus triclopyr (up to 87%), or bispyribac-sodium plus triclopyr (92%) provided superior alligatorweed control. Plots treated with penoxsulam plus triclopyr EPOST produced the highest yields (9,550 kg ha−1), which were comparable to plots receiving penoxsulam plus triclopyr LPOST (9,320 kg ha−1), penoxsulam alone EPOST (9,280 kg ha−1), and penoxsulam plus halosulfuron LPOST (9,180 kg ha−1). Considering both weed control and rice grain yields, penoxsulam plus triclopyr applied EPOST was found to be the best option among the treatments tested. The treatments bensulfuron alone, bensulfuron plus propanil, penoxsulam plus propanil, triclopyr plus propanil, and bispyribac-sodium plus propanil provided poor (≤ 65%) alligatorweed control. Results also suggest the likelihood for antagonistic interactions when tank-mix combinations tested in this study included propanil.

The effects of Velpar L (hexazinone) on seedling growth and ectomycorrhizal symbiosis of Pinusresinosa

1988 ◽  
Vol 18 (7) ◽  
pp. 917-921 ◽  
Author(s):  
P. Chakravarty ◽  
L. Chatarpaul
Keyword(s):  
Seedling Growth ◽  
Field Studies ◽  
Indigenous Species ◽  
Mycorrhizal Infection ◽  
Infection Rates ◽  
Seedling Mortality ◽  
Short Term ◽  
Ectomycorrhizal Symbiosis ◽  
Significant Recovery ◽  
Application Rates

We investigated the effects of Velpar L (hexazinone) on ectomycorrhizal (Laccarialaccata) and nonmycorrhizal Pinusresinosa seedlings in the greenhouse and in the field. In both greenhouse and field studies, seedling growth was reduced by Velpar L at 1, 2, and 4 kg/ha application rates in the short term (2 months' exposure) with significant recovery occurring afterwards. Seedling mortality occurred only with herbicide treatments and was higher in the greenhouse than in the field. The 4 kg/ha Velpar L treatment caused the highest mortality and toxicity was most pronounced in the mycorrhizal (Laccarialaccata inoculated) seedlings. In both experiments mycorrhizal infection was significantly reduced by 2 and 4 kg/ha Velpar L treatments during the 0- to 2-month and 2- to 6-month exposure periods, with significant recovery occurring in the latter. Although seedlings not infected with Laccarialaccata became mycorrhizal through unidentified indigenous species, their infection rates were also affected by Velpar L at all levels during the 0- to 2-month period and at the 2 and 4 kg/ha levels after 2–6 months of exposure to the herbicide.

Sustainability of Rice Production at Baixo Mondego, Portugal

2022 ◽  
pp. 266-287
Author(s):  
Maria de Fátima Lorena Oliveira ◽  
Sergio Oliveira ◽  
António Terrão Russo ◽  
kiril bahcevandziev ◽  
Ana Bela M. Lopes ◽  
...  
Keyword(s):  
Water Quality ◽  
Production System ◽  
Water Demand ◽  
Irrigation System ◽  
Field Research ◽  
Field Trials ◽  
Rice Production ◽  
Wetting And Drying ◽  
Marketing Systems ◽  
Dry Soil

This chapter aims to analyze the rice production system at the Baixo Mondego Valley to understand the main concerns. Field research and field trials were carried out to analyze rice production, marketing systems, and different irrigation alternatives. An analysis on the worries was made, and a correlational attempt was done. The results show a production system oriented by agri-environmental policies. The problems related with rice irrigation are water scarcity, environmental impacts on water quality, agroecosystems, and methane emissions. To reduce water demand, the alternate wetting and drying flooding method, and the improvement of the precise land levelling were studied on the scope of MEDWATERICE Project. About 12-14% of water saving was observed, with impact on production lower than 3.5%, allowing period of 11-19 days of dry soil, expecting positive implications for greenhouse gas emissions. Innovation in the irrigation system may help to reduce some of the farmers' concerns and help to better adapt this crop to the new needs of agriculture in terms of environmental competitiveness.

scholarly journals Intervention of molecular breeding in water saving rice production system: aerobic rice

3 Biotech ◽  
2019 ◽  
Vol 9 (4) ◽  
Author(s):  
Rahul Kumar Meena ◽  
Nabin Bhusal ◽  
Kuldeep Kumar ◽  
Rajinder Jain ◽  
Sunita Jain
Keyword(s):  
Production System ◽  
Molecular Breeding ◽  
Water Saving ◽  
Rice Production ◽  
Aerobic Rice
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