scholarly journals Effects of salicylic acid elicitor against aphids on wheat and detection of infestation using infrared thermal imaging technique in Ismailia, Egypt

2015 ◽  
Vol 30 (2) ◽  
pp. 91-97 ◽  
Author(s):  
Farag Mahmoud ◽  
Hatem Mahfouz
Keyword(s):  
Salicylic Acid ◽  
Thermal Imaging ◽  
Insect Pests ◽  
Foliar Application ◽  
Imaging Technique ◽  
Wheat Yield ◽  
Yield Reduction ◽  
Imaging Data ◽  
Infrared Thermal Imaging ◽  
Aphid Infestation

Wheat (Triticum sativum L.) is one of the most important cereal crops in Egypt. Insect pests, such as aphids, are major threats in terms of yield reduction. Induced resistance in wheat using salicylic acid as a foliar application was tested on the farm of the Faculty of Agriculture, Suez Canal University during 2012/2013 and 2013/2014 seasons. Three wheat cultivars, Gemeza 9, Sakha 93 and Giza 168, were sprayed three times with two concentrations of salicylic acid (SA), 200 mg/l and 100 mg/l, after early detection of aphid infestation by infrared thermal imaging. The infrared thermal imaging technique is based on significant differences in surface temperature between infested and healthy leaves. Imaging data are digital, and a computer program can be used to detect infestation rapidly. The results showed that aphid infestation raised the temperature of infested leaves, compared to healthy leaves. The range temperature difference between maximum and minimum temperatures (At) was 1.1 ?C in healthy leaves and 3.9 ?C in infected leaves. The results of SA application showed significant differences in the mean number of aphids and in reduction of infestation among treatments and cultivars. The higher of the two SA rates (200 mg/l) gave higher efficacy in the three cultivars than the lower rate (100 mg/l) over the five weeks of trial. The highest efficacy against aphids was reached one week after application (86.28% for Giza, 85.89% for Gemesa and 70.54% for Sakha). Moreover, SA treatment enhanced the wheat yield of all three cultivars, compared with control plants. The three cultivars (Giza, Gemesa and Sakha) produced higher yields than the control when sprayed with 200 mg/l SA. Their grain yield was 2,491.5, 2,455.0, and 2,327.25 kg/feddan (1 fed = 0.42 ha), respectively. In conclusion, infrared thermal imaging can be employed in identification of infected leaves. Also, the application of SA on wheat induced plant resistance to aphids.

scholarly journals The Effect of Applying Exogenous Salicylic Acid on Aphid Infection and its Influence on Histo-Physiological Traits and Thermal Imaging of Canola

2016 ◽  
Vol 49 (2) ◽  
pp. 67-85 ◽  
Author(s):  
M.A.M. Elhamahmy ◽  
M.F. Mahmoud ◽  
T.Y. Bayoumi
Keyword(s):  
Salicylic Acid ◽  
Foliar Application ◽  
Growth And Yield ◽  
Brassica Napus L ◽  
Aphid Infestation ◽  
Aphid Control ◽  
Xylem Tissue ◽  
Secretory Tissue ◽  
Four Levels ◽  
Aphid Populations

Abstract Insect damage in canola adversely affects its productivity andquality and is considered one of the most important degrading factors in Egypt. The effect of foliar application of salicylic acid (SA) on aphid populations, growth and yield of canola (Brassica napus, L.) cv. serw 4 was the major goal of this study. Two experiments were conducted at the farm of Faculty of Agriculture, Suez Canal University, Ismailia, Egypt, during 2014 and 2015 seasons, to achieve this target. Each experiment included four levels of SA (0, 50, 100, 200 mg 1-1). The experimental results revealed that SA, at low concentration (50 mg 1-1), was an effective treatment for reduction the number of aphid populations and colony depth on the main inflorescence, contributed with reducing the thickness of secretory tissue of flower pedicel. The level of 50 mg 1-1 of SA-treated canola had the highest number of stomata cm-2, along with the lowest width of both stoma and its aperture. Thickness of xylem tissue and the number of xylem vessels bundle-1 in leaf midrib, reducing sugars and free amino acids was increased at 50 mg 1-1 SA, but free phenolics content did not affected significantly. Under controlled conditions, changes in temperature of infected leaves allowed the discrimination between healthy and infected areas in thermo-image, even before visible symptoms of aphid infestation appeared. The detection of modifications in plants or canopies, associated with low insect severity in the early stages of infestation, was crucial for the targeted, site-specific or on demand application of integrated aphid control. Canola, which was treated with 50 mg 1-1 of SA, gave 30.5 and 27.9 kg of oil ha-1 over the control. It was concluded that spraying of SA at 50 mg 1-1 was an effective elicitor to diminish the aphid numbers on canola inflorescence and improve its yield.

scholarly journals An investigation of the Temperature Distribution of a Thin Steel Strip during the Quenching Step of a Hardening Process

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 675 ◽  
Author(s):  
Pouyan Pirouznia ◽  
Nils Å. I. Andersson ◽  
Anders Tilliander ◽  
Pär G. Jönsson
Keyword(s):  
Temperature Distribution ◽  
Numerical Model ◽  
Thermal Imaging ◽  
Steel Strip ◽  
Imaging Data ◽  
Infrared Thermal Imaging ◽  
Hardening Process ◽  
Real Process ◽  
Significant Temperature

The dimension quality of the strip within the hardening process is an essential parameter, which great attention needs to be paid. The flatness of the final product is influenced by the temperature distribution of the strip, specifically across the width direction. Therefore, based on physical theories, a numerical model was established. The temperature of the strip for the section before the martensitic transformation was objected in the predicted model by using a steady state approach. In addition an infrared thermal imaging camera was applied in the real process in order to validate the results and to improve the boundary conditions of the numerical model. The results revealed that the temperature of strip decreased up to 250 °C within the area between the furnace and the quenching bath. This, in turn, resulted in significant temperature difference across the width of the strip. This difference can be up to 69 °C and 41 °C according to the numerical results and thermal imaging data, respectively. Overall, this study gave a better insight into the cooling step in the hardening process. In addition, this investigation can be used to improve the hardening process as well as an input for future thermal stress investigations.

Appearance of Human Meridian-Like Structure and Acupoints and Its Time Correlation by Infrared Thermal Imaging

2007 ◽  
Vol 35 (02) ◽  
pp. 231-240 ◽  
Author(s):  
Hong-Qin Yang ◽  
Shu-Sen Xie ◽  
Xiang-Long Hu ◽  
Li Chen ◽  
Hui Li
Keyword(s):  
Thermal Imaging ◽  
Physiological Function ◽  
Imaging Technique ◽  
Pathological Change ◽  
Potential Method ◽  
Time Correlation ◽  
Human Beings ◽  
Infrared Thermal Imaging ◽  
Physiological Phenomenon ◽  
First Time

The meridians and acupoints of human bodies at natural condition are investigated among 30 healthy volunteers by infrared thermal imaging technique. The results give clear evidence of the existence of infrared radiant tracks along human meridian courses. The time dependent evolution of the infrared radiant track is observed for the first time. The time rhythm of acupoints is also studied. Our findings not only support the view that infrared radiant tracks along human meridian courses is a normal vital and physiological phenomenon appearing in human beings, but also offer a potential method for noninvasive diagnostic by studying the physiological function and pathological change of meridians or acupoints by means of thermography.

Research on Infrared Thermal Imaging Technique for the Sidewall of LNG Storage Tank

2014 ◽  
Vol 511-512 ◽  
pp. 425-428
Author(s):  
Jie Jiang ◽  
Wen Da Zhu ◽  
Gong Sheng Yang ◽  
Jing Peng Yan ◽  
Nan Jin Gao ◽  
...  
Keyword(s):  
Natural Gas ◽  
Thermal Imaging ◽  
Storage Tank ◽  
Imaging Technique ◽  
Temperature Drop ◽  
Liquefied Natural Gas ◽  
Thermal Imager ◽  
Gas Temperature ◽  
Infrared Thermal Imaging ◽  
Lng Tank

Liquefied natural gas (LNG) is obtained by cooling the gas temperature to -162 degree. Problems with the steel cans, the insulation layer or the concrete tank of the LNG tank can lead to changes of the temperature, local temperature decreases, and the safety of the tank is threatening. Through the combination of many sets of infrared thermal imager to monitor the temperature of the LNG storage tank’s sidewall, analyze the heat imagine, establish the corresponding relationship between the locations on the sidewall of the LNG tank and on the heat imagine, determine the position of the temperature point on the tank wall. Infrared thermal imaging technique for the sidewall of LNG storage tank can find out the heat abnormal conditions and fixing the temperature drop area in time, and provide powerful guarantee for the safe storage of the liquefied natural gas.

Investigating soil desiccation cracking using an infrared thermal imaging technique

2021 ◽  
Author(s):  
Hao Zeng ◽  
Chao‐sheng Tang ◽  
Cheng Zhu ◽  
Qing Cheng ◽  
Zong‐ze Lin ◽  
...  
Keyword(s):  
Thermal Imaging ◽  
Imaging Technique ◽  
Infrared Thermal Imaging ◽  
Soil Desiccation ◽  
Desiccation Cracking

scholarly journals Correlation between Plantar Foot Temperature and Diabetic Neuropathy: A Case Study by Using an Infrared Thermal Imaging Technique

2010 ◽  
Vol 4 (6) ◽  
pp. 1386-1392 ◽  
Author(s):  
Subramnaiam Bagavathiappan ◽  
John Philip ◽  
Tammana Jayakumar ◽  
Baldev Raj ◽  
Pallela Narayana Someshwar Rao ◽  
...  
Keyword(s):  
Diabetic Neuropathy ◽  
Thermal Imaging ◽  
Imaging Technique ◽  
Infrared Thermal Imaging

scholarly journals Detection of Defects in Kenaf/Epoxy using Infrared Thermal Imaging Technique

2012 ◽  
Vol 4 ◽  
pp. 172-178 ◽  
Author(s):  
M.J. Suriani ◽  
A. Ali ◽  
A. Khalina ◽  
S.M. Sapuan ◽  
S. Abdullah
Keyword(s):  
Thermal Imaging ◽  
Imaging Technique ◽  
Infrared Thermal Imaging ◽  
Detection Of Defects

scholarly journals Effect of foliar application of bioregulators for improving high temperature tolerance of wheat (Triticum aestivum L.)

2021 ◽  
Vol 42 (4) ◽  
pp. 1078-1084
Author(s):  
H. Lakhran ◽  
◽  
O.P. Sharma ◽  
R. Bajiya ◽  
J.R. Choudhary ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Harvest Index ◽  
Foliar Application ◽  
Thermal Environment ◽  
Thioglycolic Acid ◽  
Maximum Yield ◽  
Wheat Yield ◽  
Foliar Spray ◽  
Temperature Tolerance ◽  
Thermal Environments

Aim: The aim of the present study was to evaluate the effect of sowing at different thermal environments and its interaction with foliar spray of bio-regulators on yield and yield contributing traits in wheat. Methodology: The present study was conducted by using split plot design with four replications consisting of 24 treatments, namely, main plots: three sowing at different thermal environments (22oC, 20oC and 18oC) and sub plots: eight foliar spray of bioregulators (control, water spray, salicylic acid @ 100 ppm, salicylic acid @ 200 ppm, thio salicylic acid @ 100 ppm, thio salicylic acid @ 200 ppm, thioglycolic acid @ 100 ppm and thioglycolic acid @ 200 ppm). Results: The results indicated that sowing at 20oC recorded the maximum yield parameters viz, effective tillers/m row length, length of ear, no. of grains per ear, test weight, days to maturity and grain, straw and biological yield of wheat over sowing at 22oC and 18oC temperature. Sowing at different thermal environment treatments was found to be non-significant with harvest index of wheat. Among the foliar spray of bioregulators, the treatment B4 (SA @ 200 ppm) significantly increased the yield components and yield, while remaining at par with B6 (TSA @ 200 ppm) and B8 (TGA @ 200 ppm) proved superior in comparison to rest of the treatments. However, the significantly higher harvest index was obtained under B4 (SA @ 200 ppm) treatment and was statistically at par with all other treatments, except B1 and B2. Interpretation: It is concluded that salicylic acid @ 200 ppm at tillering (40-45 DAS) and ear emergence (60-65 DAS) stage may be sprayed on 20oC temperature sown crop is a viable option to improve wheat yield under semi-arid environment.

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