scholarly journals Selectivity and weed control efficacy of some herbicides applied to sprinkler irrigated rice (Oryza sativa L.)

2011 ◽  
Vol 9 (2) ◽  
pp. 597 ◽  
Author(s):  
J. Cavero ◽  
C. Zaragoza ◽  
A. Cirujeda ◽  
A. Anzalone ◽  
J. M. Faci ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Weed Control ◽  
Oryza Sativa L ◽  
Control Efficacy ◽  
Irrigated Rice

Efficacy ofExserohilum monocerasfor the control ofEchinochloaspecies in rice (Oryza sativa)

Weed Science ◽  
1997 ◽  
Vol 45 (1) ◽  
pp. 144-150 ◽  
Author(s):  
Wenming Zhang ◽  
Alan K. Watson
Keyword(s):  
Oryza Sativa ◽  
Weed Control ◽  
Dry Powder ◽  
Metal Mesh ◽  
Control Efficacy ◽  
Oil Emulsion ◽  
Leaf Stage ◽  
Inoculum Dose ◽  
Vertebrate Pests ◽  
Field Plots

Efficacy of an indigenous fungus,Exserohilum monoceras, for the control of 3Echinochloaspecies was evaluated and compared under both regulated greenhouse and screenhouse (field plots netted with 2 layers of metal mesh screening to exclude vertebrate pests) conditions. Under greenhouse conditions, an inoculum dose of 2.5 × 107conidia m−2killed all seedlings of both barnyardgrass andE. glabrescens, whereas an inoculum dose of 5.0 × 107conidia m−2was required to obtain 100% mortality of junglerice seedlings. The 1.5-leaf stage of all 3Echinochloaspecies was the most susceptible. Increasing inoculum density increased weed control efficacy on younger or olderEchinochloaseedlings. The highest level of control was observed forE. glabrescens, less for barnyardgrass, and least for junglerice. Under screenhouse conditions,Exserohilum monocerascaused more than 90% mortality ofEchinochloaspecies when the inoculum was formulated as an oil emulsion or when applied as a dry powder.

Rice (Oryza sativa L.) response and weed control from tank-mix applications of saflufenacil and imazethapyr

2012 ◽  
Vol 31 (1) ◽  
pp. 94-98 ◽  
Author(s):  
Edinalvo Rabaioli Camargo ◽  
Scott Allen Senseman ◽  
Garry Nathan McCauley ◽  
John Brad Guice
Keyword(s):  
Oryza Sativa ◽  
Weed Control ◽  
Oryza Sativa L

scholarly journals Bentazon mixtures to control weeds in rice

1969 ◽  
Vol 71 (2) ◽  
pp. 217-223
Author(s):  
Li C. Liu ◽  
Jose J. M. Lozano
Keyword(s):  
Oryza Sativa ◽  
Weed Control ◽  
Standard Treatment ◽  
Oryza Sativa L ◽  
Clay Loam ◽  
Rice Plants

Three herbicide trials on rice (Oryza sativa L.) were conducted on Coloso clay (Entisols) and on Toa clay loam (Mollisols) from 1981 to 1983 with bentazon [3(1-methyl)-(1 H)-2, 1,3-benzothiadiazin-4-(3H)-one 2,2- dioxide] mixed with propanil [N-(3,4-dichlorophenyl) propanamide] or with bifenox [methyl 5-(2,4-dichlorophenoxy) 2-nitrobenzoate] for early postemergence weed control. Good to excellent weed control was obtained by the above-mentioned bentazon mixtures. These mixtures were particularly effective against rice flatsedge (Cyperus iria L.), a weed not previously controlled by other herbicides. Marginal herbicide phytotoxicity to rice plants was noted in one trial when bentazon at a higher rate was mixed with propanil. All bentazon mixtures resulted in higher yields than standard treatment of propanil alone or thiobencarb [S-(4-dichlorophenyl methyl diethylcarbamothioate] alone by a margin of 8.7 to 26.9%.

scholarly journals Effects of spacings and butachlor levels on weed control, growth and yield of NERICA 1 rice (Oryza sativa L. x Oryza glaberrima L.)

2017 ◽  
Vol 62 (4) ◽  
pp. 361-369
Author(s):  
Hassan Kasim ◽  
Ibrahim Musa ◽  
Mustapha Muhamman
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Weed Control ◽  
Crop Production ◽  
Field Experiments ◽  
Oryza Sativa L ◽  
Growth And Yield ◽  
Oryza Glaberrima ◽  
Control Growth ◽  
Main Plot

Poor agronomic practices coupled with herbicide mismanagement influence crop performance, yield, weed infestation and environmental hazards. Thus, field experiments were carried out to investigate the effect of spacing and reduced levels of butachlor on weed control and yield of NERICA 1 rice (Oryza sativa L. x Oryza glaberrima L). The experiments were conducted in the 2011 rainy season at the Teaching and Research Farm of the Department of Crop Production and Horticulture, Modibbo Adama University of Technology, Yola, and Lake Gerio, Yola in the 2012 dry season. Yola is located between latitude 9o14? N and longitude 12o28? E in the Northern Guinea Savanna ecological zone of Nigeria. Treatments consisted of four spacings (20 cm x 20 cm, etc.) and four butachlor levels (3, 2, 1, and 0 kg ha-1 a.i.). The experiments were laid out in a split-plot design with spacings assigned to the main plot and butachlor levels assigned to the sub-plot and were replicated three times. Data were taken on percentage establishment, number of leaves per plant, general weed cover, panicle length and grain yield per hectare. Data generated were subjected to analysis of variance. Means showing a significant F-test were separated using LSD. Results obtained showed that butachlor at 1 kg ha-1 and 14 cm x 14 cm spacing gave the highest grain yield of 1441 kg ha-1 and maximum weed control. They are, therefore, recommended for adoption by farmers in Yola and similar environments.

scholarly journals Genetic Variability And Character Associations In Irrigated Rice (Oryza Sativa L)

1970 ◽  
Vol 23 (2) ◽  
pp. 23-28 ◽  
Author(s):  
S Ghosal ◽  
PL Biswas ◽  
M Khatun ◽  
S Khatun
Keyword(s):  
Oryza Sativa ◽  
Genetic Variability ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Path Coefficient ◽  
Genetic Advance ◽  
Thousand Grain Weight ◽  
Growth Duration ◽  
Irrigated Rice

Eighteen advanced breeding lines were evaluated for yield and yield contributing characters to observe their variability, associations and direct and indirect effect on yield during Boro season, 2009. All the tested characters showed significant variation. Effective tillers/m2 and spikelet sterility (%) had high genotypic variance, high heritability, high genetic advance and high genotypic coefficient of variation. Effective tillers/m2, panicle length (cm), thousand grain weight (g) and growth duration (days) showed significant positive association with grain yield. Path coefficient analysis also revealed that effective tillers/m2, thousand grain weight (g) and growth duration (days) had higher direct effects on yield (t/ha). All together with the genetic variability, correlation and path analysis revealed that effective tillers/m2, thousand grain weight (g) and growth duration (days) are the most important yield components in rice. Therefore, from the present study it could be suggested that emphasize should be given on these characters for the selection of genotypes for higher grain yield in irrigated rice.   Keywords: Rice (Oryza sativa L.); GCV; PCV; heritability; genetic advance; correlationDOI: http://dx.doi.org/10.3329/bjpbg.v23i2.9321 Bangladesh J. Pl. Breed. Genet., 23(2): 23-27, 2010

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