A comparison of field inoculation methods with Cercosporella herpotrichoides (Fron) on spring barley

1969 ◽  
Vol 73 (3) ◽  
pp. 437-444 ◽  
Author(s):  
D. Gareth Jones ◽  
J. M. L. Davies
Keyword(s):  
Grain Yield ◽  
Disease Severity ◽  
Disease Incidence ◽  
Spring Barley ◽  
Barley Variety ◽  
Field Inoculation ◽  
Inoculation Methods ◽  
Field Plots

SUMMARYA comparison was made of six different methods of inoculation with Cercosporella herpotrichoidesFron on field plots of the spring barley variety Impala. All inoculation treatments produced significant differences in terms of disease incidence and grain yield compared with the uninoculated controls. Significant differences were found between treatments in terms of disease incidence, disease severity, mean yield/head and 1000 grain weights. The time of inoculation was also found to be significant. The earlier inoculation caused a reduction in yield of approximately 66 % compared with 50 % at the later inoculation. The application of these methods is discussed.

The effects of cattle slurry and inorganic nitrogen fertilizer on the yield and quality of spring barley

1978 ◽  
Vol 90 (2) ◽  
pp. 283-289
Author(s):  
B. F. Pain ◽  
S. J. Richardsonf ◽  
Rosemary J. Fulford
Keyword(s):  
Grain Yield ◽  
Inorganic Nitrogen ◽  
Spring Barley ◽  
Barley Grain ◽  
Residual Effects ◽  
Inorganic N ◽  
Grain Yields ◽  
Yield And Quality ◽  
Field Plots

SummaryIn experiments over 3 years (1974–6) cow slurry in the range 0–112·5 t/ha and ammonium nitrate in the range 0–120 kg N/ha were applied to field plots factorially to test the effects on the yield and quality of spring barley grain.In 1974 slurry application markedly improved the grain yield (cv. Golden Promise) at each rate of inorganic N and increased grain size. Applying N fertilizer with more than 37·5 t slurry/ha reduced grain yield below the maximum. Grain with the highest crude protein content (15·1 %) was obtained from a combination of slurry and inorganic N. The residual effects of the slurry treatments gave satisfactory grain yields in 1975 without additional fertilizer.Grain yields (cvs Julia and Abacus) in other experiments carried out on a different soil type in 1975 and 1976 were approximately half those obtained in 1974, due in part to drought conditions. The pattern of the results was similar. Heaviest grain yields were harvested from plots receiving 70 t slurry/ha with no additional N.

scholarly journals Evaluation of Inoculation Methods to Determine Resistance Reactions of Wheat to Fusarium graminearum

Plant Disease ◽  
2003 ◽  
Vol 87 (12) ◽  
pp. 1530-1535 ◽  
Author(s):  
Jessica S. Engle ◽  
Laurence V. Madden ◽  
Patrick E. Lipps
Keyword(s):  
Disease Severity ◽  
Fusarium Graminearum ◽  
Partial Resistance ◽  
Disease Incidence ◽  
Type I ◽  
Type Ii ◽  
Inoculation Methods ◽  
Low Field ◽  
Inoculation Techniques ◽  
Progress Curve

Reliable greenhouse assays are needed to differentiate types of resistance in wheat to Fusarium graminearum. Genotypes with known field reactions were evaluated for resistance type using four greenhouse inoculation techniques. Percentage of spikelets with symptoms per spike (severity) and percentage of inoculated spikelets per spike developing symptoms were assessed 7, 10, and 14 days after inoculation (DAI). Genotypes were evaluated using disease assessments 14 DAI and area under the disease progress curve (AUDPC). Significant genotype-inoculation technique interactions for disease assessments indicated that genotypes responded differently to greenhouse inoculation techniques. The central floret injection technique used to assess resistance to spread within the spike (type II resistance) did not indicate a resistant response in genotypes with low field disease severity (putative type II). Atomizing macroconidia onto spikes, used to assess resistance to primary infection (type I resistance), indicated a resistant response in one of five genotypes with low field disease incidence (percentage of spikes with symptomatic spikelets) (putative type I). The inoculation techniques in the greenhouse were unable to differentiate between different types of partial resistance. Results indicated disparity in the ability of greenhouse inoculation methods to identify genotypes with partial resistance as observed in the field. It was concluded that atomizing conidia onto the spikes and assessing disease severity did not differentiate between resistance types. Additionally, a one-time assessment 14 DAI was determined to be as informative as multiple assessments and calculating the AUDPC.

scholarly journals EFFECT OF BOTANICALS FOR MANAGEMENT OF LEAF BLAST AND ENHANCING YIELD TRAITS IN RICE

2018 ◽  
pp. 17-21
Author(s):  
SANDEEP PANDEY
Keyword(s):  
Grain Yield ◽  
Disease Severity ◽  
Field Experiments ◽  
Disease Incidence ◽  
Grain Weight ◽  
Panicle Length ◽  
Leaf Blast ◽  
Yield Attributes ◽  
Pooled Data ◽  
Cent Disease

Field experiments were undertaken during kharif 2012 and 2013 under irrigated ecosystem to evaluate the efficacy of botanicals along with standard fungicides for assessing per cent disease incidence, plant height, number of tiller per plant, number of spikelet per panicle, panicle length, 100-grain weight and grain yield against blast of rice. Pooled data of two years suggest that neem based commercial biopesticides with azadiractin as active ingredients were found effective in reducing disease severity and improving the yield attribute of the crop and proves promising products when compared to standard fungicides. Among the botanicals the spraying of Achook, Neem Azal T/S, Neem gold and Tricure shows significant reduction in disease severity, along with improving yield attributes, increasing the 100-grain weight and grain yield.

scholarly journals Aggressiveness to Pumpkin Cultivars of Isolates of Phytophthora capsici from Pumpkin and Pepper

Plant Disease ◽  
2001 ◽  
Vol 85 (5) ◽  
pp. 497-500 ◽  
Author(s):  
Byung Kook Lee ◽  
Beom Seok Kim ◽  
Seog Won Chang ◽  
Byung Kook Hwang
Keyword(s):  
United States ◽  
Disease Severity ◽  
Environmental Conditions ◽  
Quantitative Resistance ◽  
Disease Incidence ◽  
Phytophthora Capsici ◽  
The United States ◽  
Host Specialization ◽  
Cultivar Resistance ◽  
Inoculation Methods

Nine isolates of Phytophthora capsici obtained from pumpkin and pepper in diverse geographic areas, including Korea, France, Italy, and the United States, were evaluated for their ability to cause disease on nine Korean and Japanese pumpkin cultivars under controlled environmental conditions. No hypersensitive type of resistance was observed in any of the pumpkin cultivars inoculated with P. capsici. Disease incidence ranged from low to high, indicating varying levels of partial (quantitative) resistance. In addition, a significant cultivar-isolate interaction was observed, indicating that host specialization was present in some cultivars. Disease severity increased with inoculum density of P. capsici. The Korean cultivar Danmatmaetdol was highly resistant to the P. capsici isolates tested, suggesting that economic levels of resistance exist in pumpkin. The pumpkin isolates from all locations caused more disease than the pepper isolates to all the pumpkin cultivars tested. Soil-drench and stem-wound inoculation methods were more reliable than a foliar-inoculation method for evaluating pumpkin cultivar resistance.

scholarly journals THE IMPACT OF PROTECTION SYSTEMS ON PHYTOSANITARY CONDITION OF SOWINGS AND PRODUCTIVITY OF THE SPRING BARLEY VARIETY “YAROMIR” IN THE RYAZAN REGION

2019 ◽  
pp. 62-67
Author(s):  
V. Z. Venevtsev ◽  
M. N. Zakharova ◽  
L. V. Rozhkova
Keyword(s):  
Grain Yield ◽  
Economic Efficiency ◽  
Spring Barley ◽  
Barley Grain ◽  
Barley Variety ◽  
Net Income ◽  
Protection Systems ◽  
Increase Productivity ◽  
Harmful Organisms ◽  
The Impact

The current study gives the results of 2-year field trails which tested three protection systems for the spring barley variety “Yaromir” to improve the phytosanitary condition of sowings and to increase productivity. It has been established that the studied protection systems effectively protected spring barley from harmful organisms from sprouting to harvesting. With a total number of weeds of 80 pcs/m2 in 2017 the effectiveness of the herbicides was 91–94%; and with a total number of weeds of 72 pcs/m2 in 2018 the effectiveness of these preparations was 92–95%. There has been evaluated fungicides’ impact on the development of dark brown and net spots. The effectiveness of the preparations through study years ranged from 89 to 92% for dark brown spots and from 80 to 85% for net spots. As a result of the analysis of spring barley productivity, it has been revealed that under the effect of protection systems there has been obtained an additional grain yield of 1.42, 1.46, 1.44 t/ha in 2017 and 1.29, 1.33, 1.26 t/ha in 2018. The analysis of the economic efficiency of the studied protection systems has shown that in 2017 a conditionally net income ranged from 1,000 to 3,650 rubles/ha, in 2018 it ranged from 5,780 to 7,636 rubles/ha, when 1 ton of spring barley grain cost 5 thousand rubles in 2017, and 9 thousand rubles in 2018.

Variation in harvest index of modern spring barley, oat and wheat cultivars adapted to northern growing conditions

2007 ◽  
Vol 146 (1) ◽  
pp. 35-47 ◽  
Author(s):  
P. PELTONEN-SAINIO ◽  
S. MUURINEN ◽  
A. RAJALA ◽  
L. JAUHIAINEN
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Stand Structure ◽  
Spring Barley ◽  
Principal Component ◽  
Grain Filling ◽  
Wheat Cultivars ◽  
Cereal Species ◽  
Growing Conditions ◽  
Cereal Cultivars

SUMMARYIncreased harvest index (HI) has been one of the principal factors contributing to genetic yield improvements in spring barley (Hordeum vulgare L.), oat (Avena sativa L.) and wheat (Triticum aestivum L.) cultivars. Although high HI demonstrates high-yielding ability when cultivars are compared, it can also indicate challenges to yield formation when comparisons are made across differing growing conditions. The present study was designed to investigate variation in HI among modern cereal cultivars relative to that brought about by a northern environment, to assess whether HI still explains the majority of the differences in grain yield when only modern cereal cultivars are compared, and to monitor key traits contributing to HI. Stability of HI was also investigated with reference to the role of tillers. Twelve experiments (3 years, two locations, two nitrogen fertilizer regimes) were carried out in southern Finland to evaluate 12 two-row spring barley, 10 six-row barley, 10 oat and 11 wheat cultivars. In addition to HI, days to heading and maturity, length of grain filling period, grain yield, test weight and 13 traits characterizing plant stand structure were measured and analysed with principal component analysis (PCA) to detect traits associated with HI and those contributing to stability of HI. Although only modern cereals were studied, differences among cultivars were significant both in mean HI and stability of HI, and HI was associated with short plant stature in all modern cereal species. Also, single grain weight was associated with HI in all species. Differences between, but not within, species in HI were partly attributable to differences in tiller performance. Grain yield was associated closely with HI except in two-row barley. It may be possible to further increase HI of wheat, as it still was relatively low. High HI did, however, not indicate the degree of success in yield determination when environments are compared.

scholarly journals Effect of Compost Amendments on Disease Severity and Yield of Tomato in Conventional and Organic Production Systems

Plant Disease ◽  
2002 ◽  
Vol 86 (2) ◽  
pp. 156-161 ◽  
Author(s):  
P. A. Abbasi ◽  
J. Al-Dahmani ◽  
F. Sahin ◽  
H. A. J. Hoitink ◽  
S. A. Miller
Keyword(s):  
Disease Severity ◽  
Production Systems ◽  
Disease Incidence ◽  
Organic Production ◽  
Fruit Rot ◽  
High Rate ◽  
Bacterial Spot ◽  
Marketable Yield ◽  
Tomato Production ◽  
Compost Amendments

Field trials were conducted over 2 years to assess the effects of compost amendments on disease development in organic and conventional processing tomato (Lycopersicon esculentum L.) production systems. The incidence of anthracnose fruit rot was reduced in organic tomato plots amended with a high rate of composted cannery wastes compared with the incidence in nonamended control plots in 1998 when disease incidence was high. Marketable yield was increased by 33% in compost-amended organic plots. Plots amended with a high compost rate had more ripe fruit than the nonamended control. The incidence of anthracnose and of total disease on fruit was less on the cultivar OH 8245 than on Peto 696. Total fruit yield of OH 8245 but not Peto 696 in organic plots was increased by amendment with composted cannery wastes. In conventional tomato production, composted yard wastes increased disease severity on foliage both years but reduced bacterial spot incidence on fruit in 1997, when disease pressure was high. The incidence of anthracnose was not affected by composted yard wastes. Marketable and total fruit yields of Peto 696 were not increased in compost-amended conventional plots. The plant activator Actigard reduced foliar disease severity and the incidence of bacterial spot and anthracnose on fruit, while increasing yield of marketable fruit.

Influence of foliar fertilization of plants with humid preparations on the productivity of spring barley in the Eastern Forest-Steppe of Ukraine

2021 ◽  
Vol 2020 (1-2) ◽  
pp. 63-72
Author(s):  
V.Y. Bukhalo ◽  
G.I. Sukhova
Keyword(s):  
Grain Yield ◽  
Spring Barley ◽  
Field Research ◽  
Barley Grain ◽  
Forest Steppe ◽  
Barley Plant ◽  
Foliar Fertilization ◽  
Current State ◽  
Growth Stimulant ◽  
Plant Growth Stimulants

The article analyzes the current state and improvement of elements of the technology of growing valuable forage and food crops, spring barley in Ukraine. It is noted that in recent years the area under large crops and the yield of this crop have decreased significantly. It is emphasized that further improvement of technologies should be focused on the transition to more use of biological agents to increase yields. Researchers have shown that the effectiveness of the use of humid preparations GK-6M, GK-4MK, GK-MK - on crops of spring barley Dokuchaivsky 15, due to foliar feeding of plants in the tiller ring phase. The main justification of the article is the results of field research conducted in 2015–2019. Maximum indicators, namely: increase in leaf area by 46–38 %, stem height by 8,3 cm; the number of grains in the ear – 4,8 pieces; ear lengths – 1,9 cm; mass of grain in the ear – 0,33 g; masses of 1000 grains – at 12,0 %; nature of grain – 34,9 g – was obtained by treating plants with humid preparation GK-6M. Foliar feeding of plants in the tiller ring phase with the studied drugs provided the largest increase in the yield of spring barley grain – 1,08 t/ha, provided the use of growth stimulant GK-6M. A slightly smaller effect of foliar fertilization of plants on the yield of spring barley was observed from the growth stimulator GK-4MK – the increase in grain yield was 0,83 t/ha and from the growth stimulant GK-MK – the increase in grain yield – 0,66 t/ha. The obtained increments are significant, mathematically proven. Further improvement of agrotechnologies due to wider use of biological means of increase of productivity and quality of production is offered. Keywords: spring barley, plant growth stimulants, foliar feeding, yield.

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