FIELD CONTROL OF LOOSE SMUT IN BARLEY WITH THE SYSTEMIC FUNGICIDES VITAVAX AND PLANTVAX

1968 ◽  
Vol 48 (1) ◽  
pp. 31-35 ◽  
Author(s):  
E. Reinbergs ◽  
L. V. Edgington ◽  
D. R. Metcalfe ◽  
V. M. Bendelow

Vitavax (2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin) applied as a seed treatment at a rate of 113 g per 45.4 kg of barley seed gave complete control of loose smut under field conditions. The seed treatment increased yield significantly in Parkland where smut in untreated plots was 49%. In York, with 16% smut in plants grown from untreated seed, yield increases were not significant. A higher dosage (227 g) also controlled smut but appeared to cause some toxicity. Seed treatment had no apparent effect on the malting quality of the seed subsequently harvested.Plantvax (2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin-4,4 dioxide) applied as a soil treatment at the rates of 5.6 kg/ha and 11.2 kg/ha also resulted in effective loose smut control in York barley but did not result in increased yield. There were indications that yield was depressed at the higher rate in York and at both rates in the variety Herta.There were also indications that treatments with either chemical had a slight effect on height, date of maturity, weight per hectoliter and 1,000-kernel weight. Seed treatment at planting time did not prevent infection of barley florets by loose smut spores 55 to 60 days after planting.

1963 ◽  
Vol 43 (2) ◽  
pp. 222-225 ◽  
Author(s):  
D. R. Metcalfe ◽  
V. M. Bendelow ◽  
W. H. Johnston
Keyword(s):  

not available


1975 ◽  
Vol 55 (4) ◽  
pp. 759-764 ◽  
Author(s):  
R. S. BHATTY ◽  
J. D. BERDAHL ◽  
G. I. CHRISTISON

Digestibility of energy (D) and digestible energy (DE) content of 16 cultivars and lines of barley (Hordeum vulgare and H. distichum) were determined by mouse-feeding and related to 1,000-kernel weight (KW), plumpness (seed size), hull, protein, lysine, starch, amylose and gross energy (GE) of the cultivars. The experimental design allowed paired comparisons to be made of D and DE between the hulled vs. hulless types, small vs. large-seeded, normal vs. high lysine, low vs. high amylose, and good vs. poor malting quality of the cultivars. The data obtained showed that KW, plumpness and lysine contents of barley had little effect on D and DE. Although four cultivar pairs (II, III, IV, and VIII) had variable starch composition, only in pair IV did high amylose content reduce D. The data appeared to suggest that good malting quality in barley is not incompatible with high D and DE as determined by mouse-feeding. The hull content of the cultivars had a major influence both on D and DE. The mean D and DE values for the six hulless cultivars were 85.7% and 3,918 kcal/kg compared with means of 79.2% and 3,627 kcal/kg for the 10 hulled cultivars.


1963 ◽  
Vol 43 (4) ◽  
pp. 534-541 ◽  
Author(s):  
D. A. Dew ◽  
V. M. Bendelow

Tests conducted at Lacombe, Alberta, indicate barley may be harvested at a stage of maturity indicated by a kernel moisture content of 35 per cent, without any significant effect on malting quality. The per cent heavy grade and 1000-kernel weight increased rapidly till approximately 40 per cent kernel moisture was reached and showed little change from there to maturity. Barley nitrogen and saacharifying activity increased slightly throughout the complete range. The per cent extract was not consistent, some tests showing a slight increase and some showing a slight decrease with approaching maturity.


1945 ◽  
Vol 23c (6) ◽  
pp. 212-218 ◽  
Author(s):  
Margaret Newton ◽  
B. Peturson ◽  
W. O. S. Meredith

An experiment was carried out to test the effect of leaf rust of barley (Puccinia anomala Rostr.) on the yield, grade, and malting quality of the six barley varieties, O.A.C. 21, Mensury, Chevron, Peatland, Regal, and Plush. Leaf rust reduced the grade of O.A.C. 21 and Mensury by one commercial grade, and caused statistically significant reductions in the yield, bushel weight, and kernel weight of all the varieties tested except Mensury. It adversely affected the value of all the varieties for malting purposes by reducing the percentage of heavy-grade kernels. The nitrogen content and the wort nitrogen content were reduced by leaf rust, but the malt extract and diastatic powers were not greatly affected. Differentia¡ responses of the varieties to rust infection were observed in yield, kernel weight, bushel weight, and malt properties.


1987 ◽  
Vol 67 (4) ◽  
pp. 953-963 ◽  
Author(s):  
A. K. SUMNER ◽  
W. L. CROWLE ◽  
D. T. SPURR ◽  
J. A. KERNAN

Three barley (Hordeum vulgare L.) cultivars, Betzes, Harrington and Scout, a hulless cultivar, were harvested at kernel moisture contents (KMC) ranging from 55 to 12% at Saskatoon, Saskatchewan in 1983 and 1984. The traditional swathing/air drying/threshing method, and the straight combining/artificial drying method were investigated. Generally all cultivars showed little or no improvement in the yield, 1000-kernel weight, test weight, proximate analysis and malting properties as the KMC decreased from 40% to about 15%. Harvesting above a KMC of 40% caused yield losses ranging from about 21 to 35% and deterioration of most other properties. In 1983, straight (direct) combining generally resulted in yields averaging 10–15% higher than the traditional swathing method, but in 1984 the effect of the harvesting methods was reversed. The swathing method usually produced superior malting quality but when harvested above a KMC of 40%, such barley would only be suitable for feed.Key words: Barley, kernel moisture content, harvesting method, yield, quality, immaturity


2008 ◽  
Vol 36 (1) ◽  
pp. 97-105 ◽  
Author(s):  
K. Vejražka ◽  
V. Psota ◽  
J. Ehrenbergerova ◽  
P. Hrstkova

Author(s):  
A.V. Konstantinovich ◽  
◽  
A.S. Kuracheva ◽  
E.D. Binkevich

In conditions of climate change, when temperature and precipitation fluctuations occur more and more frequently during the growing season, it is necessary to obtain high quality seedlings with "immunity" to various stress factors, including high weediness, the damage from which is associated with a decrease in yield (by 25 -35%) and with a deterioration in the quality of agricultural products. Due to the imbalance in production technology, seedlings are often weakened, overgrown, with a low yield per unit area and survival rate in the field. One of the solutions to this problem is the use of PP for pre-sowing seed treatment to increase the competitiveness of seedlings in the field.


1979 ◽  
Vol 85 (3) ◽  
pp. 141-143 ◽  
Author(s):  
S. G. Reeves ◽  
E. D. Baxter ◽  
H. L. Martin ◽  
T. Wainwright
Keyword(s):  

2018 ◽  
Vol 39 (2) ◽  
pp. 855 ◽  
Author(s):  
Janete Denardi Munareto ◽  
Thomas Newton Martin ◽  
Tania Maria Müller ◽  
Ubirajara Russi Nunes ◽  
Guilherme Bergeijer da Rosa ◽  
...  

Seed treatment is a practice that helps the initial establishment of the crop without the effects caused by pests and diseases. The association of diazotrophic bacteria with grasses has been used in the supply of nitrogen to plants; however, these microorganisms produce growth-promoting substances, which promote benefits in the growth and development of the crops. Thus, the objective of this study was to evaluate the compatibility of Azospirillum brasilense associated with the fungicide difenoconazole and the insecticide thiamethoxam by observing the effects on the quality of seed emergence of three wheat cultivars (Triticum aestivum L.). Three wheat cultivars, arranged in a 4 x 2 factorial system with four replicates, were tested. The treatments were the control; difenoconazole (Spectro® at a dose of 150 mL per 100 kg of seed); thiamethoxam (Cruiser® FS 350 at a dose of 200 mL per 100 kg seed) and difenoconazole + thiamethoxam, applied on wheat cultivars TBIO Mestre, TBIO Itaipu and TBIO Sinuelo. Bacteria from the Azospirillum genus were used in the inoculation. The wheat seed retains its quality when it checks the germination, vigor and independent accelerated aging, whether or not fungicide, insecticide and A. brasilense were used. The insecticide thiamethoxam increased the length of shoots and roots and provided compatibility with A. brasilense, and fungicide inhibited the length of shoots and roots and was antagonistic to the bacterium A. brasilense.


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