scholarly journals Tobacco Disease in Australia

Nature ◽  
1936 ◽  
Vol 137 (3465) ◽  
pp. 525-526
Keyword(s):  
Tobacco Disease

The global tobacco disease pandemic: Nature, causes, and cures

2006 ◽  
Vol 1 (1) ◽  
pp. 65-86 ◽  
Author(s):  
K.E. Warner ◽  
J. MacKay
Keyword(s):  
Tobacco Disease

Establishment and application of diagnosis expert system of tobacco disease

2010 ◽  
Vol 36 (3) ◽  
pp. 312-316
Author(s):  
Shu-guang PENG ◽  
Gui-bin LI ◽  
Qian-jun TANG ◽  
Qi-ming XIAO ◽  
Jin YAN ◽  
...  
Keyword(s):  
Expert System ◽  
Tobacco Disease

Brave new world of tobacco disease prevention

2002 ◽  
Vol 23 (3) ◽  
pp. 226-228 ◽  
Author(s):  
Jack E Henningfield ◽  
Christine A Rose ◽  
Gary A Giovino
Keyword(s):  
Disease Prevention ◽  
New World ◽  
Brave New World ◽  
Tobacco Disease

scholarly journals Effect of a Chromosome Segment Marked by the Php Gene for Resistance to Phytophthora nicotianae on Reproduction of Tobacco Cyst Nematodes

Plant Disease ◽  
2009 ◽  
Vol 93 (3) ◽  
pp. 309-315 ◽  
Author(s):  
C. S. Johnson ◽  
E. A. Wernsman ◽  
J. A. LaMondia
Keyword(s):  
Host Resistance ◽  
Dominant Gene ◽  
Field Research ◽  
Phytophthora Nicotianae ◽  
Chromosome Segment ◽  
Single Dominant Gene ◽  
Cyst Nematodes ◽  
Black Shank ◽  
Breeding Lines ◽  
Tobacco Disease

Host resistance is an important strategy for managing Globodera tabacum subsp. solanacearum and G. tabacum subsp. tabacum, important nematode pests of flue-cured tobacco (Nicotiana tabacum) in Virginia, and cigar wrapper tobacco (N. tabacum) in Connecticut and Massachusetts, respectively. Field research from 1992 to 2005 evaluated reproduction of G. tabacum subsp. solanacearum on genotypes with and without a chromosome segment from N. plumbaginifolia containing a gene (Php) that conferred resistance to race 0 of Phytophthora nicotianae (causal agent of tobacco black shank). Ratios of G. tabacum subsp. solanacearum eggs/500 cm3 soil at the end versus the beginning of experiments (Pf/Pi) were significantly lower in cultivars and breeding lines possessing the Php-containing chromosome segment from N. plumbaginifolia compared with genotypes without the segment. Numbers of vermiform G. tabacum subsp. solanacearum juveniles in roots were similar among genotypes but numbers of swollen and pyriform nematodes were significantly lower for the known G. tabacum subsp. solanacearum resistant cv. NC 567 and in genotypes possessing the Php gene compared with genotypes and cultivars without the gene. In a 2003 greenhouse test, the percentage of plants with visible G. tabacum subsp. tabacum cysts was also significantly lower for parental and progeny genotypes homozygous and heterozygous, respectively, for Php compared with similar lines without the gene. These results indicate a close linkage or association between a likely single, dominant gene (Php) for resistance to P. nicotianae and suppressed reproduction by G. tabacum subsp. solanacearum and G. tabacum subsp. tabacum. Further research to accurately elucidate the relationships among these genes could lead to significant improvements in tobacco disease control.

scholarly journals Research on the model for tobacco disease prevention and control based on case-based reasoning and knowledge graph

Filomat ◽  
2018 ◽  
Vol 32 (5) ◽  
pp. 1947-1952 ◽  
Author(s):  
Lichuan Gu ◽  
Yingchun Xia ◽  
Xiaohui Yuan ◽  
Chao Wang ◽  
Jun Jiao
Keyword(s):  
Disease Prevention ◽  
Prevention And Control ◽  
Principal Component ◽  
Support Vector ◽  
Knowledge Graph ◽  
Case Based Reasoning ◽  
Long Time ◽  
And Control ◽  
Tobacco Disease ◽  
Case Based

Tobacco is one of the most important economic crops in China. The yield and quality of tobacco reduce severely because of long-time disease invasion. Currently, the main focus of researches on tobacco disease prevention and control is the diagnosis of disease that has occurred, which ignores to predict disease before it outbreaks. Therefore, in this paper, we follow the idea that prediction is used before disease prevention and control and study the model for tobacco disease prevention and control by using knowledge graph and case-based reasoning (CBR). In order to implement the model, we choose tobacco mosaic virus (TMV) as research object and follow the following methods to prevent occurrence of that. At first, a method to predicting environmental factors by using principal component analysis (PCA) and support vector machine (SVM) is proposed. According to the prediction result, knowledge graph and CBR are used to retrieve the most similarity case and finally determine the best solution. Experimental results demonstrate that our model can achieve high accuracy and give the most appropriate scheme for disease prevention and control.

scholarly journals The Impacts of Different Green Manure on Soil Microbial Communities and Crop Health

2016 ◽  
Author(s):  
Hongwu Yang ◽  
Jiaojiao Niu ◽  
Jiemeng Tao ◽  
Yabing Gu ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Soil Properties ◽  
Microbial Communities ◽  
Soil Nutrients ◽  
Green Manure ◽  
Soil Microbial Communities ◽  
Disease Rate ◽  
Rrna Gene ◽  
Soil Microbial ◽  
Tobacco Disease ◽  
Crop Health

Green manure could improve soil nutrients and crop production, playing a significant role in sustainable agriculture. However, the impacts of green manure on crop health and the roles soil microbial communities play in the process haven’t been clarified clearly yet. In this study, we investigated soil microbial community composition and structure in four tobacco farmlands, which were treated with different green manure (control, ryegrass, pea and rape), using 16S rRNA gene amplicons sequencing. Results showed that green manure had significant impacts on soil properties, microbial communities and tobacco health. First, soil total C, N and Ca content increased significantly in groups treated with green manure than control. Second, soil community diversity was significantly higher in groups treated with green manure. Third, green manure especially ryegrass, decreased tobacco disease (bacterial wilt) rate dramatically, and the process might be mediated by soil microbial communities. On the one hand, several microbial populations were found to be potentially disease inducible or suppressive. For example, the abundances of Dokdonella and Rhodanobacter were positively correlated to tobacco disease rate, while Acidobacteira_Gp4 and Gp6 had negative correlations with tobacco disease. On the other hand, soil microbial communities were shaped by soil properties (e.g., pH, C and N content). In conclusion, our research showed that green manure could increase soil nutrients directly, and further improve tobacco health mediated by soil microorganisms, which may shed light on revealing interactions among soil properties, microorganisms and plants.

scholarly journals Tobacco-disease Image Recognition via Multiple-Attention Classification Network

2020 ◽  
Vol 1584 ◽  
pp. 012008
Author(s):  
Y Sun ◽  
H Q Wang ◽  
Z Y Xia ◽  
J H Ma ◽  
M Z Lv
Keyword(s):  
Image Recognition ◽  
Tobacco Disease
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