scholarly journals Interaction of Temperature and Moisture on Infection of Wild Rice by Bipolaris oryzae in the Growth Chamber

Plant Disease ◽  
1997 ◽  
Vol 81 (10) ◽  
pp. 1193-1195 ◽  
Author(s):  
J. A. Percich ◽  
R. F. Nyvall ◽  
D. K. Malvick ◽  
C. L. Kohls
Keyword(s):  
Wild Rice ◽  
Period Length ◽  
Growth Chamber ◽  
Optimum Temperature ◽  
Dry Period ◽  
Bipolaris Oryzae ◽  
Flag Leaves ◽  
Zizania Palustris

Infection of wild rice (Zizania palustris) flag leaves by Bipolaris oryzae was studied at temperatures of 5 to 35°C and wet periods of 2 to 36 h after inoculation. Lesion densities (lesions/cm2) increased with increasing wet periods depending on optimum temperature. High rates of infection occurred at 25 and 30°C and generally increased with continuous wet periods of 16, 18, 24, and 28 h. There were no lesions at 5°C and few at 10 and 35°C. Lesion densities declined when wet periods of 2, 4, or 6 h were interrupted by dry periods of 4, 6, 8, 10, or 12 h followed by a final 14 h of wetness. Lesion densities decreased at all temperatures with increased dry periods regardless of the initial wet period. The interaction of dry period length × wet period length × temperature was significant at the 0.5% level. With continuous wet periods, lesion numbers were highest at 25 to 30°C.

Hydroponic culture of wild rice (Zizania palustris L.) and its application to studies of silicon nutrition and fungal brown spot disease

1993 ◽  
Vol 73 (4) ◽  
pp. 969-975 ◽  
Author(s):  
D. K. Malvick ◽  
J. A. Percich
Keyword(s):  
Wild Rice ◽  
Hydroponic Culture ◽  
Brown Spot ◽  
Mineral Nutrient ◽  
Bipolaris Oryzae ◽  
Spot Disease ◽  
Zizania Palustris ◽  
Brown Spot Disease ◽  
Viable Seeds ◽  
Silicon Nutrition

The mineral nutrient requirements of wild rice (Z. palustris var. interior L.) grown on flooded soils in Minnesota are poorly understood. A hydroponics culture system was developed to study the effects of silicon on the growth and fungal brown spot disease (FBS) resistance of wild rice. Wild rice was grown to maturity using a modified Hoagland’s solution. Plants attained a height of 1.4 m and had healthy roots, leaves and inflorescences containing viable seeds. Plant height and biomass were approximately 80 and 46%, respectively, of plants grown in cultivated paddies. A method was developed to reliably infect leaves and stems of hydroponically grown wild rice with Bipolaris oryzae, the pathogen causing FBS. Silicon amendments did not significantly increase growth and had no apparent effect on resistance to FBS. Key words: Bipolaris oryzae, hydroponic culture, plant nutrition, silicon, wild rice, Zizania palustris

Hypoxic metabolism in wild rice (Zizania palustris): enzyme induction and metabolite production

1993 ◽  
Vol 89 (1) ◽  
pp. 165-171 ◽  
Author(s):  
Douglas G. Muench ◽  
O. William Archibold ◽  
Allen G. Good
Keyword(s):  
Enzyme Induction ◽  
Wild Rice ◽  
Metabolite Production ◽  
Zizania Palustris

Effects of dry period length on milk yield and content and metabolic status of high-producing dairy cows under heat stress

2021 ◽  
Vol 53 (2) ◽  
Author(s):  
A. Boustan ◽  
V. Vahedi ◽  
M. Abdi Farab ◽  
H. Karami ◽  
R. Seyedsharifi ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Period Length ◽  
Metabolic Status ◽  
Dry Period

Wild rice (Zizania palustris L.) prevents atherogenesis in LDL receptor knockout mice

2013 ◽  
Vol 230 (2) ◽  
pp. 284-292 ◽  
Author(s):  
Gangadaran Surendiran ◽  
ChunYan Goh ◽  
Khuong Le ◽  
Zhaohui Zhao ◽  
Fatemeh Askarian ◽  
...  
Keyword(s):  
Knockout Mice ◽  
Wild Rice ◽  
Ldl Receptor ◽  
Zizania Palustris ◽  
Ldl Receptor Knockout Mice

Toxicity of sulfide to early life stages of wild rice (Zizania palustris )

2017 ◽  
Vol 36 (8) ◽  
pp. 2217-2226 ◽  
Author(s):  
Douglas J. Fort ◽  
Kevin Todhunter ◽  
Troy D. Fort ◽  
Michael B. Mathis ◽  
Rachel Walker ◽  
...  
Keyword(s):  
Wild Rice ◽  
Early Life ◽  
Life Stages ◽  
Early Life Stages ◽  
Zizania Palustris

Associations between dry period length and time to culling and pregnancy in the subsequent lactation

2021 ◽  
Author(s):  
P. Pattamanont ◽  
K.N. Galvão ◽  
M.I. Marcondes ◽  
J.S. Clay ◽  
A. De Vries
Keyword(s):  
Period Length ◽  
Dry Period

Effects of Giant Burreed (Sparganium eurycarpum) and Shade on Wild Rice (Zizania palustris)

Weed Science ◽  
1987 ◽  
Vol 35 (5) ◽  
pp. 640-646 ◽  
Author(s):  
Sharon A. Clay ◽  
Ervin A. Oelke
Keyword(s):  
Wild Rice ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Shoot Density ◽  
Growth And Yield ◽  
Zizania Palustris ◽  
Major Mechanism ◽  
Panicle Number ◽  
In The Wild ◽  
Sparganium Eurycarpum

Studies were conducted at Grand Rapids, MN, to determine the effect of giant burreed (Sparganium eurycarpumEngelm. # SPGEU) planted at 6, 12, and 24 corms/m2on wild rice (Zizania palustrisL. ‘K2′) growth and yield. Giant burreed, a spreading perennial, had shoot densities of 21, 29, and 42/m2at harvest for the 6, 12, and 24 corms/m2treatments, respectively. Wild rice yield and panicle number were reduced approximately 60% when giant burreed shoot density was 40/m2or higher when compared to the weed-free control. Giant burreed did not interfere with nutrient uptake of wild rice on a whole-plant basis, and increased N fertilizer application did not reduce losses in dry weight. Giant burreed reduced penetration of photosynthetically active radiation (PAR) from 2 to 35% in the wild rice canopy from the early tillering to the anthesis stage of wild rice development. In growth chamber studies, wild rice dry weight and panicle number were reduced by 46 and 65%, respectively, when wild rice was shaded for 12 weeks and compared to a full light treatment. Reduction of PAR penetration into the wild rice canopy appears to be the major mechanism of giant burreed interference with wild rice.

scholarly journals Effects of dry period length on follicular dynamics in early lactating Holstein cows

2009 ◽  
Vol 2009 ◽  
pp. 134-134
Author(s):  
A Soleimani ◽  
A Heravi Moussavi ◽  
M Danesh Mesgaran ◽  
S Safa
Keyword(s):  
Dairy Cow ◽  
Detrimental Effect ◽  
Good Reason ◽  
Period Length ◽  
Holstein Cows ◽  
Dry Period ◽  
Management Change ◽  
Lactating Cows ◽  
Current Advice ◽  
Follicular Dynamics

For profitable production of milk, a nonlactating or dry period is established between lactations of dairy cow. There has been substantial recent interest in shortening dry periods. Physiological studies show that the changes the udder goes through to prepare for the next lactation take about three weeks, and yet current advice is that the most appropriate dry period for a modern dairy cow is 45 to 60 days. More recent studies show good reason to question that advice, and suggest dry periods of 30 to 35 days have no detrimental effect on production, but information relating the effects of dry period to subsequent reproductive performance of lactating cows is sparse (Grummer, 2007). Also, the effect of this management change on follicular dynamic has not been adequately evaluated. Therefore, the objective of the present study was to determine the effects of dry period length on follicular dynamics in early lactating Holstein cows.

Chemical Control of Giant Burreed (Sparganium eurycarpum) in Wild Rice (Zizania palustris)

1990 ◽  
Vol 4 (2) ◽  
pp. 294-298
Author(s):  
Sharon A. Clay ◽  
Ervin A. Oelke
Keyword(s):  
Chemical Control ◽  
Wild Rice ◽  
Dry Weight ◽  
Amine Salt ◽  
Leaf Stage ◽  
Zizania Palustris ◽  
Sparganium Eurycarpum

The response of giant burreed to bentazon, propanil, 2,4-D (amine salt), and 2,4-D plus crop oil (0.5% v/v) was evaluated at the 2-aerial-leaf stage of wild rice. Bentazon, 2,4-D, and 2,4-D plus crop oil at 1.1 kg/ha or more in 1984, and propanil and 2,4-D plus crop oil at 4.5 kg/ha in 1985 reduced giant burreed dry weight. Generally, herbicide rates above 1.1 kg/ha injured wild rice and reduced yields compared to weed-free controls. None of the study treatments resulted in effective giant burreed control without unacceptable injury to wild rice.

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