Calorimetric evaluation of responses of Sitophilus oryzae and Tribolium confusum to elevated temperatures and controlled atmospheres

2008 ◽  
Vol 44 (3) ◽  
pp. 295-303 ◽  
Author(s):  
C.J. Downes ◽  
C.W. van Epenhuijsen ◽  
R.E. Lill ◽  
J.E. Downes ◽  
A. Carpenter ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Sitophilus Oryzae ◽  
Tribolium Confusum ◽  
Controlled Atmospheres

scholarly journals Semifield study on the effect of membrane-based nitrogen production for the control of the eggs of Sitophilus oryzae (L.) and Tribolium confusum J. du V.

2020 ◽  
Vol 52 (2) ◽  
Author(s):  
D.P. Locatelli ◽  
P. Girgenti ◽  
L. Moncini ◽  
L. Limonta
Keyword(s):  
Sitophilus Oryzae ◽  
Adult Emergence ◽  
Nitrogen Atmosphere ◽  
Tribolium Confusum ◽  
Controlled Atmosphere ◽  
Mean Temperature ◽  
Percent Mortality ◽  
The Mean ◽  
Mixed Age

In this paper, the effect of a highly purified N2 (98.5%) controlled atmosphere-generated in situ by a membrane nitrogen separator on mixed age eggs of Sitophilus oryzae and Tribolium confusum was evaluated. Trials were carried out in an airtight stainless silo filled with wheat, in which a nitrogen atmosphere was maintained for durations lasting from one to several days. The mean temperature recorded during the treatment varied from 22 to 24°C. After the treatment, the eggs were transferred to a jar with rearing medium and kept at 27±1°C and 70±5% R.H. The jars were checked every two days to record adult emergence. Eighty percent mortality was observed in T. confusum and S. oryzae with two and four days of treatment, respectively. One hundred percent mortality was obtained after five days of treatment in the case of T. confusum and six days for S. oryzae.

EFFECTS OF MYRISTICA FRAGRANS FRUIT (FAMILY: MYRISTICACEAE) TO FOUR SPECIES OF STORED-PRODUCT INSECTS1

1989 ◽  
Vol 24 (2) ◽  
pp. 168-173 ◽  
Author(s):  
Helen C. F. Su
Keyword(s):  
Untreated Control ◽  
Callosobruchus Maculatus ◽  
Sitophilus Oryzae ◽  
Tribolium Confusum ◽  
Lasioderma Serricorne ◽  
Myristica Fragrans ◽  
Flour Beetles ◽  
F1 Progeny ◽  
Acetone Extracts ◽  
F1 Generation

Acetone extracts of mace and nutmeg applied topically at dosages up to 50μg/insect were nontoxic to cowpea weevils, Callosobruchus maculatus (F.), slightly toxic to cigarette beetles, Lasioderma serricorne (F.), and confused flour beetles, Tribolium confusum Jacquelin du Val, and moderately toxic to rice weevils, Sitophilus oryzae (L.). Initially, both extracts showed strong repellency to rice weevils on surface-treated wheat at 2000 ppm for mace and 2000, 1000, and 500 ppm for nutmeg, although the repellency deteriorated rapidly. However, similarly treatd wheat greatly reduced the number of F1 progeny of rice weevils. This reduction decreased gradually. At 23 weeks after treatment, only the 2000 ppm dose of mace and nutmeg extract-treated wheat gave a significant reduction of the F1 generation when compared with the untreated control.

scholarly journals Field efficacy of brief exposure of adults of six storage pests to nitrogen-controlled atmospheres

2017 ◽  
Vol 53 (No. 3) ◽  
pp. 169-176
Author(s):  
Aulicky Radek ◽  
Kolar Vlastimil ◽  
Plachy Jan ◽  
Stejskal Vaclav
Keyword(s):  
Sitophilus Oryzae ◽  
Cryptolestes Ferrugineus ◽  
Oryzaephilus Surinamensis ◽  
Field Validation ◽  
Top Down ◽  
Storage Pests ◽  
The Czech Republic ◽  
Controlled Atmospheres ◽  
Field Efficacy ◽  
Significant Mortality

The efficacy of a brief exposure (1, 7, and 10 days) to a nitrogen-controlled atmosphere (N-CA) for major storage<br />pests in a field validation study in the Czech Republic is reported. The main goal was to estimate how quickly the<br />mobile adult stages of six species of storage beetles (Oryzaephilus surinamensis, Cryptolestes ferrugineus, Tribolium<br />confusum, Tribolium castaneum, Sitophilus granarius, and Sitophilus oryzae) are killed after introduction of the<br />infested commodity to prevent their further spread to the surrounding storage bins. The trials were conducted in a<br />metal bin containing 25 t of seeds using the system of continual top-down nitrogen filling to replace the oxygen. The<br />composition of N-CA in the silo was measured continually. The target N-CA concentration (i.e., ≤ 1% O<sub>2</sub> and 99% N<sub>2</sub>)<br />was reached at the bottom of the silo after 12 h of the purging phase of nitrogen silo filling. A one-day exposure to<br />N-CA corresponds to top-down filling, which initially gives higher concentrations of N2 in the upper than in the lower<br />part of the silo: low efficacy was reached at the silo bottom (0–33.3%), while higher efficacy (16.7–100%) was reached<br />at the top of the silo bin. The mortality variation at both locations was species dependent: the most sensitive was O.<br />surinamensis, and the least sensitive were S. granarius and S. oryzae. Seven days of N-CA exposure led to 100% mortality<br />of all tested species except for S. granarius (96.7% mortality at the bottom), while 10 days of N-CA exposure led<br />to 100% mortality of all adults located at both the bottom and the top of the silo. This experiment showed that one<br />day of exposure to N-CA caused significant mortality to reduce the spread of insects from the top of the silo but not<br />from the silo bottom, and 10 days of exposure completely prevent the adult mobile pest stages of all tested species<br />from spreading from the treated silo and causing cross-infestation in the storage facility.

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