Detection of granary weevil Sitophilus granarius (L.) eggs and internal stages in wheat grain using soft X-ray and image analysis

2007 ◽  
Vol 43 (2) ◽  
pp. 142-148 ◽  
Author(s):  
Józef Fornal ◽  
Tomasz Jeliński ◽  
Jadwiga Sadowska ◽  
Stanisław Grundas ◽  
Jan Nawrot ◽  
...  
Keyword(s):  
Image Analysis ◽  
Sitophilus Granarius ◽  
Wheat Grain ◽  
Granary Weevil ◽  
X Ray

Evaluation of Four Analytical Methods to Detect Weevils in Wheat: Granary Weevil, Sitophilus granarius (L.), in Soft White Wheat

1988 ◽  
Vol 51 (7) ◽  
pp. 547-553 ◽  
Author(s):  
GERALD E. RUSSELL
Keyword(s):  
Analytical Methods ◽  
Sitophilus Granarius ◽  
Insect Infestation ◽  
Granary Weevil ◽  
X Ray ◽  
White Wheat ◽  
Controlled Conditions ◽  
Analytical Results ◽  
Flotation Method

Soft white wheat was infested with adult granary weevils under controlled conditions at 3 levels of infestation, and samples were removed for testing 6 times over a total of 48 d. Three analytical methods available for use in FDA laboratories were compared along with a simple counting of the visually-detectable, insect-damaged kernels in a 100-g sample. The objective of the study was to determine how the analytical results compared with one another and with the levels of infestation. Data confirmed that the more rapid visual exam of wheat is not reliable for indicating the hidden, internally-developing weevils. Analysts should be aware of the possibility that wheat inspected visually could be passable with respect to insect-damaged kernels, but still may produce violative flour due to high insect fragment counts when processed. More research is needed to correlate insect infestation in wheat with insect fragment counts in flour. The two methods which could be used to estimate potential flour contamination caused by weevils are the x-ray exam and the cracking and flotation method, since both of these reveal the stages of weevil development inside the kernels. Tables present the results of the analyses and relate them to the number and sex of the founding adults in each level of infestation.

scholarly journals Effects of sublethal doses of contact insecticides on offspring production of different granary weevil populations

2010 ◽  
Vol 25 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Petar Kljajic ◽  
Ilija Peric
Keyword(s):  
Laboratory Population ◽  
Sitophilus Granarius ◽  
Wheat Grain ◽  
Granary Weevil ◽  
Offspring Production ◽  
Pirimiphos Methyl ◽  
Sublethal Doses ◽  
F2 Generation ◽  
Contact Insecticides ◽  
F1 Generation

The effects of prior contact of granary weevil (Sitophilus granarius L.) parents from a laboratory population, a Belgrade Port population (selected with LD70 pirimiphos-methyl) and a Bijeljina population (selected with LD70 deltamethrin) with filter paper treated with sublethal doses (LD20 and LD50) of the insecticides dichlorvos, malathion, chlorpyrifos-methyl, pirimiphos-methyl and deltamethrin on offspring production of the surviving insects in F1 generation (after 10 weeks) and F2 generation (after 16 weeks) in untreated wheat grain was examined under laboratory conditions. Offspring reduction of laboratory weevils was highest at 96% in the F1 generation after parents' contact with LD50 dichlorvos, and lowest in F2 generation after contact with LD50 pirimiphos-methyl with 84% more insects than in the control. The highest offspring reduction of selected weevils from Belgrade Port, 83%, was recorded in F1 generation after treatment with LD50 dichlorvos and chlopyrifos-methyl, and the lowest in F1 and F2 generations after contact with LD50 pirimiphos-methyl, around 44%. The highest offspring reduction of the selected weevils from Bijeljina, 100%, was found in F1 and F2 generations after contact with LD50 dichlorvos, malathion and deltamethrin, and the lowest again in F1 and F2 generations after contact with LD20 chlorpyrifos-methyl, in which case insect numbers were some 130% higher than in the control. The results indicate that sublethal insecticide doses, apart from a significant decrease in their efficacy against treated granary weevil populations, may also provoke an increase in insect numbers in the following generations.

EFFECTS OF PHOTOPERIOD ON THE BIOLOGY OF THE GRANARY WEEVIL, SITOPHILUS GRANARIUS L. IN THE LABORATORY

2012 ◽  
Vol 3 (11) ◽  
pp. 1165-1171
Author(s):  
Y. Darwish ◽  
Y. Omar ◽  
R. Hassan ◽  
M. Mahmoud
Keyword(s):  
Sitophilus Granarius ◽  
Granary Weevil

Image processing techniques used for dental x-ray image analysis

2008 ◽  
Author(s):  
Stefan Oprea ◽  
Costin Marinescu ◽  
Ioan Lita ◽  
Mariana Jurianu ◽  
Daniel Alexandru Visan ◽  
...  
Keyword(s):  
Image Processing ◽  
Image Analysis ◽  
X Ray ◽  
Image Processing Techniques ◽  
Processing Techniques

ASSESSMENT OF OSTEOARTHRITIS INITIATIVE–KELLGREN AND LAWRENCE SCORING PROJECTS QUALITY USING COMPUTER ANALYSIS

2010 ◽  
Vol 13 (04) ◽  
pp. 197-201 ◽  
Author(s):  
Lior Shamir ◽  
David T. Felson ◽  
Luigi Ferrucci ◽  
Ilya G. Goldberg
Keyword(s):  
Image Analysis ◽  
Gold Standard ◽  
Population Studies ◽  
Detection Accuracy ◽  
X Rays ◽  
Analysis Method ◽  
Image Analysis Method ◽  
X Ray ◽  
Osteoarthritis Initiative ◽  
Kellgren And Lawrence

The detection of knee osteoarthritis (OA) is a subjective task, and even two highly experienced and well-trained readers might not always agree on a specific case. This problem is noticeable in OA population studies, in which different scoring projects provide significantly different scores for the same knee X-rays. Here we propose a method for quantitative assessment and comparison of knee X-ray scoring projects in OA population studies. The method works by applying an image analysis method that automatically detects OA in knee X-ray images, and comparing the consistency of the scores when using each of the scoring projects as "gold standard." The method was applied to compare the osteoarthritis initiative (OAI) clinic reading derived Kellgren and Lawrence (K&L) scores to central reading, and showed that when using the derived K&L scores the automatic image analysis method was able to accurately differentiate between healthy joints and moderate OA joints in ~70% of the cases. When the OAI central reading scores were used as gold standard, the detection accuracy was elevated to ~77%. These results show that the OAI central readings scores are more consistent with the X-rays, indicating that the central reading better reflects the radiographic features associated with OA, compared to the OAI K&L scores derived from clinic readings.

scholarly journals Defects of copper patina / Vady mìdìných patin

2015 ◽  
Vol 59 (3) ◽  
pp. 87-90 ◽  
Author(s):  
J. Stoulil ◽  
P. Šedá ◽  
M. Anisová ◽  
Z. Fencl ◽  
P. Novák ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Image Analysis ◽  
Compact Surface ◽  
Historical Buildings ◽  
X Ray Diffraction ◽  
X Ray ◽  
Destructive Analysis ◽  
High Degree ◽  
Scanning Electron

Abstract The paper is focused on analyses of dark copper patina defects that were formed on one sheet under the same conditions. Roofs of ten historical buildings were studied by image analysis and samples of two roofs were subjected to more detailed destructive analysis. These samples were studied by means of scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffraction and infrared spectroscopy. Both types of patina are composed of brochantite. Green patinas consisted of a pure brochantite and they had a fl at and compact surface. Conversely, black patina contained a high degree of impurities (ammonia cations, nitrates, silicates) and the surface was rough. The proportion of dark patina was higher in south and east facing surfaces, where washing by rainfall is more difficult.

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