Fuzzification of rubber tree white root disease based on leaf's discolouration

2013 ◽  
Author(s):  
Faridatul Aima Ismail ◽  
Hadzli Hashim ◽  
Nina Korlina Madzhi ◽  
Noor Ezan Abdullah ◽  
Rosidah Sam ◽  
...  
Keyword(s):  
Rubber Tree ◽  
Root Disease

Root-rot diseases of the rubber tree in the Ivory Coast. 1. Severity, dynamics, and characterization of epidemics

1988 ◽  
Vol 18 (10) ◽  
pp. 1248-1254 ◽  
Author(s):  
Daniel Nandris ◽  
Michel Nicole ◽  
Jean Paul Geiger
Keyword(s):  
Root Rot ◽  
Ivory Coast ◽  
Rubber Tree ◽  
Epidemiological Survey ◽  
Root Disease ◽  
First Year ◽  
Defense Reactions ◽  
Trophic Connections ◽  
Kinetics Of

An epidemiological survey was carried out in a rubber tree (Heveabrasiliensis Willd. ex A. Juss) plantation to study and describe the epidemics of the root-rotting fungi Rigidoporuslignosus (Klotzsch) Imazeki and Phellinusnoxius (Corner) G. Cunn. Infection and mortality of the trees were systematically recorded half-yearly for 6 years. During the first year, the outbreak resulted in a considerable enlargement of the initial disease centers and the appearance of new ones. Pathogen activity was found to decrease 6 years after planting. This was attributed to the increase in defense reactions with the age of the tree and to disruption of trophic connections between forest inocula and decaying taproots of rubber trees. The type of root disease is discussed, mainly in terms of the kinetics of the creation of disease centers.

scholarly journals Discriminant Analysis with Visible Lighting Properties for White Root Disease Infected Rubber Tree

2015 ◽  
Vol 99 ◽  
pp. 012023 ◽  
Author(s):  
Hadzli Hashim ◽  
Ahmad Faiz Mohd Sampian ◽  
Noor Aishah Khairuzzaman ◽  
Noor Ezan Abdullah ◽  
Mohd Suhaimi Sulaiman ◽  
...  
Keyword(s):  
Discriminant Analysis ◽  
Rubber Tree ◽  
Root Disease

Determination of White Root Infected Rubber Tree through Dielectric Characteristic in Latex

2015 ◽  
Vol 1134 ◽  
pp. 231-235
Author(s):  
Azrie Faris Mohd Azmi ◽  
Hadzli Hashim ◽  
Mohd Suhaimi Sulaiman ◽  
Nur Baiti Wahid ◽  
Noor Aishah Khairuzzaman ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Electrochemical Impedance Spectroscopy ◽  
Electrical Properties ◽  
Electrochemical Impedance ◽  
Rubber Tree ◽  
Root Disease ◽  
Rubber Plantation ◽  
Rigidoporus Lignosus ◽  
Serious Disease

White root disease caused byRigidoporus lignosusis one of most serious disease in rubber plantation. Until now, research about white root disease relates to electrical properties is still less. Hence, this research investigated the differences in electrical properties of healthy and white root disease through dielectric constant value. Seventy six samples of healthy and white root disease respectively were collected from rubber estate located in Kota Tinggi, Johor. Measurement of dielectric constant value for both conditions of latex has been done using Electrochemical Impedance Spectroscopy (EIS) in the range of frequency between 50 Hz up to 10 kHz. The result obtained from this measurement was proceeding with the statistical analysis to analyze the differences of healthy and white root disease. It was found that at frequency 150 Hz, the dielectric constant of healthy and white root disease have show significant differences.

scholarly journals Classification of healthy and white root disease infected rubber trees based on relative permittivity and capacitance input properties using LM and SCG artificial neural network

2020 ◽  
Vol 19 (1) ◽  
pp. 222
Author(s):  
Mohd Suhaimi Sulaiman ◽  
Zuraidi Saad
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Statistical Analysis ◽  
Relative Permittivity ◽  
Rubber Tree ◽  
Root Surface ◽  
Root Disease ◽  
Rubber Plantation ◽  
Single Input

<span>White root disease is one of the most serious diseases in rubber plantation in Malaysia that originally infects on the root surface of the rubber tree. So, prevention is important compared to treatment. The classification system proposed in the research had the ability of detecting the disease by classifying between healthy rubber trees and white root disease infected rubber trees. 600 samples of latex from healthy rubber trees and white root disease infected rubber trees were taken from the RRIM station in Kota Tinggi, Johor. These samples were measured based on its relative permittivity and capacitance. All of the measurement inputs from the experiment were tested using statistical analysis. These measurement input were then went through the process of classification in ANN to generate the optimized models by using LM and SCG algorithm. There were four optimized models selected from the classification process. The accuracy from the selected most optimized models were greater than 70%. The selected most optimized models were then used to classify between healthy trees and white root infected trees based on single input categories. </span>

scholarly journals First Report of Black Root Disease Caused by Chaetomium globosum on Rubber Tree Seedlings in Yunnan, China

Plant Disease ◽  
2019 ◽  
Vol 103 (4) ◽  
pp. 763 ◽  
Author(s):  
G. Z. Jiang ◽  
F. Gao ◽  
J. Liu ◽  
Y. X. Liu ◽  
Y. P. Shi ◽  
...  
Keyword(s):  
Rubber Tree ◽  
Root Disease ◽  
Chaetomium Globosum ◽  
Tree Seedlings ◽  
First Report
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