Multiple Regression of Tobacco Black Shank, Root Knot, and Coarse Root Indexes on Soil pH, Potassium, Calcium, and Magnesium

1970 ◽  
Vol 60 (10) ◽  
pp. 1513 ◽  
Author(s):  
Randall R. Kincaid
Keyword(s):  
Multiple Regression ◽  
Soil Ph ◽  
Black Shank ◽  
Coarse Root ◽  
Calcium And Magnesium ◽  
Tobacco Black Shank

Use of Bacillus velezensis SDTB022 against tobacco black shank (TBS) and the biochemical mechanism involved

2021 ◽  
pp. 104785
Author(s):  
Yue Qiu ◽  
Hao-Hao Yan ◽  
Shou-Min Sun ◽  
Yong-Qiang Wang ◽  
Xue-Ru Zhao ◽  
...  
Keyword(s):  
Biochemical Mechanism ◽  
Bacillus Velezensis ◽  
Black Shank ◽  
Tobacco Black Shank

scholarly journals Residual effect of sewage sludge fertilization on sunflower yield and nutrition

2015 ◽  
Vol 19 (10) ◽  
pp. 1005-1011 ◽  
Author(s):  
Hermann C. de Albuquerque ◽  
Geraldo R. Zuba Junio ◽  
Regynaldo A. Sampaio ◽  
Luiz A. Fernandes ◽  
Fabiano B. S. Prates ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Block Design ◽  
Residual Effect ◽  
Exchange Capacity ◽  
Growth Characteristics ◽  
Randomized Block Design ◽  
Calcium And Magnesium ◽  
Potential Acidity

ABSTRACTThis study aimed to evaluate the residual effect of sewage sludge fertilization on yield and nutrition of sunflower in its second cycle. The experiment was carried out from April to August 2012. The treatments consisted of four doses of sewage sludge (0, 10, 20 and 30 t ha-1, dry basis) applied in the first cycle of sunflower, distributed in a randomized block design, with six replicates. Sunflower stem diameter, plant height, capitulum diameter and yield increased with the increment in sewage sludge doses, with maximum values observed with the dose of 30 t ha-1. The contents of calcium and magnesium in the soil, pH, sum of bases, effective and potential cation exchange capacity and base saturation increased, while potential acidity and the contents of manganese and iron in the leaves decreased, with the increment in the residual doses of sewage sludge. There was a reduction in yield and growth characteristics of sunflower in the second cycle; thus, additional fertilization with sewage sludge is recommended in each new cycle.

Biocontrol of tobacco black shank disease (Phytophthora nicotianae) by Bacillus velezensis Ba168

2020 ◽  
Vol 165 ◽  
pp. 104523 ◽  
Author(s):  
Dongsheng Guo ◽  
Chenhong Yuan ◽  
Yunyan Luo ◽  
YaHan Chen ◽  
Meihuan Lu ◽  
...  
Keyword(s):  
Phytophthora Nicotianae ◽  
Bacillus Velezensis ◽  
Black Shank ◽  
Tobacco Black Shank

LABORATORY AND GREENHOUSE STUDIES ON EFFECT OF LIME AND OTHER AMENDMENTS ON WATER-SOLUBLE BORON IN SOIL

1958 ◽  
Vol 38 (1) ◽  
pp. 27-35 ◽  
Author(s):  
R. F. Bishop ◽  
R. L. Cook
Keyword(s):  
Sodium Hydroxide ◽  
Soil Ph ◽  
Laboratory Experiments ◽  
Boron Content ◽  
Magnesium Carbonate ◽  
Water Soluble ◽  
Plant Analysis ◽  
Laboratory Studies ◽  
Ph Values ◽  
Calcium And Magnesium

Greenhouse and laboratory experiments were used to study the effect of various soil amendments on the water-soluble boron content of a strongly acid soil.In the greenhouse, using ladino clover as the test crop, liming reduced boron availability as measured by soil and plant analysis. Calcium-boron ratios in the clover ranged from approximately 550:1 to 2000:1 and there was a significant correlation between the water-soluble boron in the soil and the boron content of the clover.In the laboratory studies calcium and magnesium carbonates were equally effective in decreasing water-soluble boron in soil. Gypsum was ineffective. Manure or alfalfa hay increased the water-soluble boron content of soil in proportion to the amounts applied. Applications of sodium hydroxide, resulting in a range of soil pH values from 4.82 to 9.72, were accompanied by decreases in water-soluble boron until a pH of approximately 8.0 was reached. Above this point water-soluble boron increased. At comparable pH values of approximately 7.0 or less, sodium hydroxide caused a smaller reduction in water-soluble boron than did either calcium or magnesium carbonate.

scholarly journals Soil reaction and absorption of silicon by rice

2007 ◽  
Vol 64 (2) ◽  
pp. 176-180 ◽  
Author(s):  
Mônica Sartori de Camargo ◽  
Hamilton Seron Pereira ◽  
Gaspar Henrique Korndörfer ◽  
Angélica Araújo Queiroz ◽  
Caroline Borges dos Reis
Keyword(s):  
Acetic Acid ◽  
Silicic Acid ◽  
Soil Ph ◽  
Total Content ◽  
Magnesium Silicate ◽  
Soil Reaction ◽  
Rice Plants ◽  
Randomized Design ◽  
Calcium And Magnesium ◽  
Soluble Silicon

The solubility and availability of silicon can be influenced by soil reaction. A pot experiment with a clayey textured Rhodic Acrustox was conducted under greenhouse conditions to evaluate the effect of soil reaction on silicon availability to rice plants. The experiment was set up in a completely randomized design, using a factorial scheme (4 x 4) with four materials (calcitic lime, calcium and magnesium silicate, pure silicic acid, and wollastonite), four rates (0, 2500, 5000 and 7500 mg per 5 kg-pot) and four replicates. After 60 days, dry matter yield and silicon absorption by the rice shoot plants, pH CaCl2, and soluble silicon (0.5 mol L-1 acetic acid and 0.01 mol L-1CaCl2) in the soil were evaluated. The materials increased soil pH as the applied rates increased, except silicic acid. Soluble silicon extracted by 0.5 mol L-1 acetic acid also increased with applied rates. For calcium chloride, soluble silicon increased in the soil only with wollastonite and calcium and magnesium silicate, agreeing with its total content. Silicon absorption by the above-ground part of the rice plants was linearly correlated with rates of wollastonite, followed by calcium and magnesium silicate, silicic acid and calcitic lime. Soil pH increase with lime was not sufficient to provide silicon to the rice. The 0.01 mol L-1 CaCl2 soluble silicon had the best correlation with silicon absorption by plants. More studies are necessary under field conditions and other soils to corroborate the presented results.

scholarly journals Prickly Ash Seed Kernel: A New Bio-Fumigation Material Against Tobacco Black Shank

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 770
Author(s):  
Yaochen Wang ◽  
Minghong Liu ◽  
Xiaobin Han ◽  
Yanfen Zheng ◽  
Jianmin Chao ◽  
...  
Keyword(s):  
Octadecadienoic Acid ◽  
Solid Phase ◽  
Vaccenic Acid ◽  
Phytophthora Nicotianae ◽  
Gas Chromatography Mass Spectrometry ◽  
Hexadecenoic Acid ◽  
Seed Kernel ◽  
Higher Plant ◽  
Black Shank ◽  
Tobacco Black Shank

The present study evaluated the fumigant effect and potential mechanisms of Chinese prickly ash seed kernel (PSK) against tobacco black shank caused by Phytophthora nicotianae Breda de Haan. The results showed that PSK fumigant increased the soil organic matter, hydrolysable nitrogen, available potassium, and total phosphorus significantly, while the pH was decreased. Application of 2% PSK promoted plant growth, with higher plant height, root length, and dry weight compared to those in the treatment with no PSK. Both in vitro and in vivo tests indicated that PSK fumigant effectively inhibited mycelial growth of P. nicotianae, and significantly reduced the severity of tobacco black shank. Based on the analysis of volatiles in PSK by headspace solid-phase microextraction (HS-SPME) gas chromatography-mass spectrometry (GC-MS), 28 components were identified, among which monoterpenes were the major components (accounting for 79.46% of peak area). Among the six top components, linalool, piperitone, sabinene, and limonene exhibited strong mycelial inhibition of P. nicotianae. Linalool was the most effective with an IC50 value of 18.03 μL/L. Results of GC-MS revealed that the main components of PSK extract were cis-Vaccenic acid (40.81%), n-Hexadecanoic acid (15.67%), 9,12-Octadecadienoic acid (Z,Z)- (15.25%), Ethanone-1-(2-hydroxy-4,6-dimethoxyphenyl)- (10.32%), cis-9-Hexadecenoic acid (6.21%), and Psilocin (11.75%). Among them, Ethanone-1-(2-hydroxy-4,6-dimethoxyphenyl)- and 9,12-Octadecadienoic acid (Z,Z)- have an obvious inhibitory effect on P. nicotianae. Additionally, changes in soil bacterial and fungal communities were observed. The relative abundance of some microbes, such as Pseudomonas, Azospirillum, Thermomonas, Glutamicibacter, Dyella, and Trichoderma, increased, which have many beneficial microbes in these genera, indicating that microbial community shift could be one of the important outcomes of the PSK fumigant effect. In conclusion, PSK could be a new bio-fumigation material against plant soilborne pathogens, which can function as both a fungicide and fertilizer.

Resistance to Tobacco Black Shank in Nicotiana Species

Crop Science ◽  
2006 ◽  
Vol 46 (2) ◽  
pp. 554-560 ◽  
Author(s):  
B.‐C. Li ◽  
W. T. Bass ◽  
P. L. Cornelius
Keyword(s):  
Black Shank ◽  
Nicotiana Species ◽  
Tobacco Black Shank

scholarly journals Stem and Root Resistance to Tobacco Black Shank

Plant Disease ◽  
1999 ◽  
Vol 83 (8) ◽  
pp. 777-780 ◽  
Author(s):  
A. S. Csinos
Keyword(s):  
Coastal Plain ◽  
Lesion Development ◽  
Black Shank ◽  
Root Decay ◽  
Stem Resistance ◽  
Race 1 ◽  
Root Resistance ◽  
Lower Stem ◽  
Tobacco Black Shank

Stem lesion development in the absence of root decay in tobacco black shank caused by Phytophthora parasitica var. nicotianae has become common in the Coastal Plain tobacco growing area in Georgia. All aboveground symptoms of wilting, blackening of lower stem, and destruction of the pith can occur on tobacco without or with minor root decay. This type of black shank disease development occurred in 14 of 15 locations evaluated and accounted for about 30% of diseased plants. Cultivars with Florida 301—derived resistance had very low stem resistance to race 0 of the pathogen. However, root inoculations of these cultivars resulted in disease reactions typical of those expected in vivo in Georgia. Cultivars Coker 371-Gold and NC 71 and the breeding line 1071 demonstrated high resistance to inoculation with race 0 of P. parasitica var. nicotianae in both the stem and the roots, but they were susceptible when stem-inoculated with race 1 of the pathogen. Severity of root decay was isolate dependent.

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