Identification of rice-weevil (Sitophilus oryzae L.) damaged wheat kernels using hyperspectral data on four sides of wheat kernels

2021 ◽  
pp. 103313
Author(s):  
Liu Zhang ◽  
Heng Sun ◽  
Hao Li ◽  
Zhenhong Rao ◽  
Haiyan Ji
Keyword(s):  
Sitophilus Oryzae ◽  
Hyperspectral Data ◽  
Rice Weevil ◽  
Wheat Kernels

scholarly journals Effecs of damage by wheat bug, Aelia germari [Hemiptera : Pentatomidae], on grain quality and on reproductive performance of the rice weevil, Sitophilus oryzae [Coleoptera : curculionidae]

2005 ◽  
Vol 78 (3) ◽  
pp. 105-116 ◽  
Author(s):  
R. Fourar ◽  
F. Fleurat-Lessard
Keyword(s):  
Grain Quality ◽  
Wheat Cultivar ◽  
Sitophilus Oryzae ◽  
Kernel Weight ◽  
Rice Weevil ◽  
Wheat Kernels ◽  
Assimilable Nitrogen ◽  
Insect Attack ◽  
Different Levels

The wheat bug, Aelia germari, feeds on developing wheat kernels, causing a loss in baking quality of the harvested wheat (Triticum aestivum). The possible nutritional changes in the bug-damaged kernels after the harvest were tested in a bioassay using the rice weevil Sitophilus oryzae, which feeds on the kernel endosperm. The weevils were reared on baking wheat cultivar 'Manon demias', grown in Algeria, with different levels (0, 4, 8 and 13%) of wheat bug (A. germari) damaged kernels. Rice weevil reared on 4, 8 or 13% damaged wheat had a shorter development time than on wheat with no damage. However, pair-wise correlations showed that Dobie's index for susceptibility of grain for stored-products insect attack, number of progeny per female and kernel weight loss were not correlated with the percentage of damaged kernels. Using multivariate analysis, the general characteristics of high quality grain were associated with long development times for S. oryzae, low number of progeny, high baking strength, high falling number, high nitrogen, low ash content, and low assimilable nitrogen.

Ozone as a Potential Fumigant Alternative for the Management of Sitophilus oryzae (Coleoptera: Curculionidae) in Wheat

2019 ◽  
Vol 112 (4) ◽  
pp. 1953-1963 ◽  
Author(s):  
Barbara A Amoah ◽  
Rizana M Mahroof
Keyword(s):  
Survival Rate ◽  
Exposure Time ◽  
Insect Pest ◽  
Sitophilus Oryzae ◽  
Adult Emergence ◽  
Rice Weevil ◽  
Ozone Exposure ◽  
Immature Stages ◽  
Gas Loss ◽  
Wheat Kernels

Abstract Gaseous ozone, an oxidizing agent used as a disinfectant in food processing and preservation, has potential for the control of stored product insects. In this study, we investigated ozone for the management of the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae), a serious stored product insect pest. We exposed eggs, immature stages within wheat kernels, and adults of the rice weevil to 200-ppm ozone for 12, 24, 36, 48, and 60 h. Insects were placed at 5, 15, or 25 cm depth within a wheat mass in PVC pipes (10 cm in diameter, 30 cm in height) and exposed to ozone. Egg eclosion was recorded 10 d after treatment (DAT), and immature stages were observed for adult emergence 28 DAT. Adults were observed for survival immediately after ozone exposure and again at 1 and 2 DAT. Egg eclosion was significantly lower at 5 cm compared with 25 cm at all exposure times, but not the 12-h exposure time. For each exposure time tested, significantly lesser adults developed from kernels and none of the adults survived at the 5 cm depth compared with the 15 and 25 cm depths. Survival rate of adults was significantly higher at 25 cm depth than at 15 cm depth at the 24–60 h. The deeper the insect in the grain mass, the higher the survival rate. The work reported suggests that ozone is effective in killing all life stages of S. oryzae; however, the efficacy of the gas is dependent on the concentration, exposure time, depth, and gas loss.

Rice cultivars affect fitness-related characteristics and digestive physiology of the rice weevil, Sitophilus oryzae (L.) (coleoptera: Curculionidae)

2021 ◽  
Vol 93 ◽  
pp. 101821
Author(s):  
Mahdi Jalaeian ◽  
Mozhgan Mohammadzadeh ◽  
Mohammad Mohammadzadeh ◽  
Ehsan Borzoui
Keyword(s):  
Sitophilus Oryzae ◽  
Rice Weevil ◽  
Rice Cultivars ◽  
Digestive Physiology

SOFT X–RAY INSPECTION OF WHEAT KERNELS INFESTED BY SITOPHILUS ORYZAE

2003 ◽  
Vol 46 (3) ◽  
Author(s):  
C. Karunakaran ◽  
D. S. Jayas ◽  
N. D. G. White
Keyword(s):  
Sitophilus Oryzae ◽  
X Ray ◽  
Wheat Kernels

scholarly journals Potential insecticidal activity of four essential oils against the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 7767-7783
Author(s):  
Mohamed E. Tawfeek ◽  
Hayssam M. Ali ◽  
Mohammad Akrami ◽  
Mohamed Z. M. Salem
Keyword(s):  
Mass Spectrometry ◽  
Alkaline Phosphatase ◽  
Sitophilus Oryzae ◽  
Imperata Cylindrica ◽  
Rice Weevil ◽  
Gas Chromatograph ◽  
Cymbopogon Citratus ◽  
Phytochemical Composition ◽  
Germacrene D ◽  
Gas Chromatograph Mass Spectrometry

Oils extracted from Cymbopogon citratus, Lantana camara, Artemisia camphorata, and Imperata cylindrica plants were used as potential insecticides against the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae). The phytochemical composition of the isolated oils was identified by gas chromatograph-mass spectrometry (GC-MS). Oil contact toxicities were evaluated against the adults of S. oryzae. The activities of acetylcholinesterase (AChE), alkaline phosphatase (ALP), and transaminases enzymes (AST) were measured. L. camara oil (LC50 = 9.81 mg/cm2) demonstrated the highest effect, followed by C. citratus oil (LC50 = 10.89 mg/cm2), A. camphorata EO (LC50 = 16.12 mg/cm2), and I. cylindrica oil (LC50= 36.85 mg/cm2) against the adults of S. oryzae. The inhibition percentages of AChE were 38.8, 41.7, 35.0, and 27.2%; ALP were 42.4, 49.3, 28.1, and 18.7%; AST were 33.9, 38.7, 20.8, and 11.8%; and ALT were 22.7, 30.5, 14.6, and 9.6% after treated S. oryzae with oils from C. citratus, L. camara, A. camphorata and I. cylindrica, respectively. The highest abundant compounds in C. citratus were geranial (25.95%), nerylacetal (8.85%), and neral (8.45%), in L. camara were caryophyllene (12.2%), and 3-elemene (8.89%), in A. camphorata were germacrene D-4-ol (20.83%), and borneol (19.47%), and in I. cylindrica were 5-phenylundecane (10.68%), and 6-phenyldodecane (8.70%).

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