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.

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

Endocarp Structural Components of Insect Resistance in Almond

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 526d-526
Author(s):  
M. Freeman ◽  
C. Walters ◽  
M.A. Thorpe ◽  
T. Gradziel
Keyword(s):  
Insect Resistance ◽  
Insect Pests ◽  
Stone Fruit ◽  
Structural Components ◽  
Insect Infestation ◽  
Insect Feeding ◽  
Kernel Development ◽  
X Ray ◽  
Seal Integrity ◽  
Structural Barrier

Almond, as with other stone fruit, possesses a highly lignified endocarp or shell. The dominant hard-shelled trait (D-) is positively associated with greater resistant to insect infestation than nuts expressing the paper-shelled (dd) trait. Hard-shelled genotypes have undesirable effects, including a lower kernel meat-to-nut crack-out ratio, greater kernel damage during mechanical shelling, and a reduction in plant energy available to kernel development. Histogenic analysis shows that the almond endocarp, unlike peach, has a tri-partite structure. Insect feeding studies have subsequently demonstrated that the inner endocarp layer, which is similar in both hard and paper-shelled types, is the most important structural barrier to insect infestation. Shell-seal integrity and X-ray studies have confirmed that discontinuities at the inner endocarp suture seal are the primary, though not the sole site of entry for insect pests. Paper-shelled almond selections with highly lignified and well-sealed inner endocarps show resistance levels comparable to hard shelled types but with crack-out ratios 30% to 40% higher. Pseudo-paper-shelled types have also been selected, in which a highly lignified outer endocarp is formed, but is retained by the fruit hull at dehiscence. An understanding of endocarp morphology and development is thus important in breeding for insect resistance as well as the commercial utilization of both kernel and hull.

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

scholarly journals Emerging surface characterization techniques for carbon steel corrosion: a critical brief review

2017 ◽  
Vol 473 (2199) ◽  
pp. 20160852 ◽  
Author(s):  
D. Dwivedi ◽  
K. Lepkova ◽  
T. Becker
Keyword(s):  
Carbon Steel ◽  
Analytical Methods ◽  
Surface Characterization ◽  
Construction Material ◽  
Film Surface ◽  
Surface Films ◽  
Corrosive Media ◽  
Metallic Substrates ◽  
X Ray ◽  
X Ray Absorption

Carbon steel is a preferred construction material in many industrial and domestic applications, including oil and gas pipelines, where corrosion mitigation using film-forming corrosion inhibitor formulations is a widely accepted method. This review identifies surface analytical techniques that are considered suitable for analysis of thin films at metallic substrates, but are yet to be applied to analysis of carbon steel surfaces in corrosive media or treated with corrosion inhibitors. The reviewed methods include time of flight-secondary ion mass spectrometry, X-ray absorption spectroscopy methods, particle-induced X-ray emission, Rutherford backscatter spectroscopy, Auger electron spectroscopy, electron probe microanalysis, near-edge X-ray absorption fine structure spectroscopy, X-ray photoemission electron microscopy, low-energy electron diffraction, small-angle neutron scattering and neutron reflectometry, and conversion electron Moessbauer spectrometry. Advantages and limitations of the analytical methods in thin-film surface investigations are discussed. Technical parameters of nominated analytical methods are provided to assist in the selection of suitable methods for analysis of metallic substrates deposited with surface films. The challenges associated with the applications of the emerging analytical methods in corrosion science are also addressed.

Granary Weevil, Sitophilus granarius (Linnaeus) (Coleoptera: Curculionidae)

2008 ◽  
pp. 1653-1653
Author(s):  
Stewart B. Peck ◽  
Carol C. Mapes ◽  
Netta Dorchin ◽  
John B. Heppner ◽  
Eileen A. Buss ◽  
...  
Keyword(s):  
Sitophilus Granarius ◽  
Granary Weevil

scholarly journals Contributions to the Knowledge of Morphology of the Granary Weevil (Sitophilus Granarius L.), Major Pest of the Stored Cereals

1970 ◽  
Vol 66 (1) ◽  
Author(s):  
Adrian DINUŢĂ ◽  
Horia BUNESCU ◽  
Ilonka BODIŞ
Keyword(s):  
Sexual Dimorphism ◽  
Scientific Literature ◽  
Sitophilus Granarius ◽  
Granary Weevil ◽  
Complex Study ◽  
Sexual Pheromones ◽  
The World ◽  
Major Pest

To solve the multiple practical aspects raised by the achieving of cereals stocks protection (especially wheat and corn) against granary weevil Sitophilus granarius L., the research aimed a complex study on the sexual dimorphism at this species, aspect which help to prevent the weevils damages using unpollutant methods (with the aid of sexual pheromones, ovogenesis inhibitors, etc.). Due to the summarily data in the scientific literature of the world refering to the sexual dimorphism of the species, a detailed study was made within the Entomology Laboratory at the Faculty of Agriculture of USAMV Cluj-Napoca and at the Center of Electronical Microscopy of Babeş-Bolyai University in Cluj-Napoca (Romania), during 2005-2009

scholarly journals Supplemental Material: An intracontinental orogen exhumed by basement-slice imbrication in the Longmenshan Thrust Belt of the Eastern Tibetan Plateau

2021 ◽  
Author(s):  
Zhenhua Xue ◽  
Wei Lin ◽  
et al.
Keyword(s):  
Tibetan Plateau ◽  
Energy Dispersive ◽  
Thrust Belt ◽  
Eastern Tibetan Plateau ◽  
X Ray ◽  
Related Energy ◽  
Analytical Results ◽  
Longmenshan Thrust Belt ◽  
Step Heating

Three figures (Figs. S1–S3) and two tables (Tables S1–S2). Figure S1: Images and related Energy Dispersive X-ray spectra to show that quartz melts infilled in feldspar crack; Figure S2: Features of samples selected for 40Ar-39Ar dating; Figure S3: Inverse isochron lines that yield false initial 40Ar/39Ar ratio; Table S1: Detailed SIMS U-Pb zircon results of sample CX48; Table S2: Detailed 40Ar/39Ar VG3600 Furnace Step-Heating Analytical Results.

scholarly journals The RAPD Analysis of Genetic Variability in the Granary Weevil (Sitophilus Granarius L.) Populations

2008 ◽  
Vol 48 (4) ◽  
Author(s):  
Katarzyna Nowaczyk ◽  
Aleksandra Obrępalska-Stęplowska ◽  
Magdalena Gawlak ◽  
Paweł Olejarski ◽  
Jan Nawrot
Keyword(s):  
Genetic Variability ◽  
Rapd Analysis ◽  
Sitophilus Granarius ◽  
Granary Weevil
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