scholarly journals Effect of the Bioـ Insecticide; ( Xan-Tari , Bacillus thuringiensis) on Two of Stored Prodect Insects ( Oryzaephilus surinamensis and Sitophilus granarius ) and Determination its Toxicity in Male albino rat

2021 ◽  
Vol 59 (3) ◽  
pp. 833-844
Keyword(s):  
Bacillus Thuringiensis ◽  
Sitophilus Granarius ◽  
Oryzaephilus Surinamensis ◽  
Albino Rat

The effect of aeration on the vertical distribution of grain beetles (Coleoptera) in wheat

1983 ◽  
Vol 73 (2) ◽  
pp. 233-237 ◽  
Author(s):  
D. M. Armitage ◽  
P. G. Day ◽  
G. J. Lewis
Keyword(s):  
Vertical Distribution ◽  
Rhyzopertha Dominica ◽  
Sitophilus Granarius ◽  
Oryzaephilus Surinamensis ◽  
Similar Difference ◽  
Grain Beetles ◽  
The Vertical Distribution

AbstractIn order to see if aeration causes grain beetles to become peripherally distributed in bulks of grain, the positions of adults were recorded 7–10 days after they had been placed in the middle of vertical columns of wheat 1200 mm long and 80 mm in diameter. The columns were held at 10 or 25°C, and a downward current of air was passed through half of them. At 10°C, there were more adults of Oryzaephilus surinamensis (L.) at the ends and fewer at the centre of aerated than unaerated tubes when a high airflow was used, and at 25°C, a similar difference occurred when aeration caused cooling, dampening or drying of the grain. Dampening at 10°C and drying at 25°C caused there to be fewer adults of Sitophilus granarius (L.) at the ends and more at the centre of aerated than unaerated tubes. However, vibration at 10°C encouraged the dispersion of weevils. Rhyzopertha dominica (F.) scarcely moved at 10 or 25°C under either aerated or unaerated conditions.

The survival of Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) and Sitophilus granarius (L.) (Coleoptera: Curculionidae) in aerated bins of wheat during british winters

1987 ◽  
Vol 77 (3) ◽  
pp. 457-466 ◽  
Author(s):  
D. M. Armitage ◽  
B. E. Llewellin
Keyword(s):  
The Other ◽  
Sitophilus Granarius ◽  
Oryzaephilus Surinamensis ◽  
One Year ◽  
Better Than ◽  
Grain Temperature

AbstractThe survival of Oryzaephilus surinamensis (L.) and Sitophilus granarius (L.) adults at the surface and centre of two 40-tonne bins of wheat, each aerated at about 10 m3/h per tonne was studied in separate experiments over three successive years. In one bin, fan operation was controlled manually, but in the other an automatic differential thermostat was used. This switched on the fan when the centre of the bin was 2°C warmer than the ambient. O. surinamensis always survived better than S. granarius in the same bin and position. Both species survived better at the surface of each bin than at the centre, and both died quicker at the centre of the bin with aeration controlled with a differential thermostat, where the grain temperature was usually less than 4°C, than in the bin with aeration regulated manually, which was mainly above 6°C. However, there was no difference between bins in the survival of either species at the surface. S. granarius always died out in both positions in both bins, but O. surinamensis always survived at the surface of both bins, and in one year it survived at the centre of the bin with aeration controlled manually.

A method of assessing the physical condition of insect-damaged grain and its application to a faunistic survey

1963 ◽  
Vol 54 (1) ◽  
pp. 23-35 ◽  
Author(s):  
C. W. Coombs
Keyword(s):  
Physical Condition ◽  
Size Composition ◽  
Insect Population ◽  
Sitophilus Granarius ◽  
Oryzaephilus Surinamensis ◽  
Volume Data ◽  
Southern England ◽  
Physical Conditions ◽  
Before And After

A method of assessing the physical condition of grain residues is described. It consists of utilising data obtained by taking the weight and volume of samples before and after sieving over a 1/10-inch mesh.The application of this method to a survey of the insect population of wheat residues beneath the floor of a small granary in southern England is described. Information from the weight and volume data obtained enabled the samples to be classified in a manner agreeing with visual estimates. It had the advantage of objectivity.Three vertical series of samples were taken and analysed, and the insects present counted and identified. The size, composition and distribution of the insect population is briefly discussed in relation to the condition of the residues and their depth below the surface. The fauna consisted of grain pests (Sitophilus granarius (L.), Oryzaephilus surinamensis (L.), Ptinus tectus Boield., P. fur (L.) and Hofmannophila pseudospretella (Stnt.)) and incidental species (fungus feeders and ground-dwellers) and the two groups differed in their distribution and in their apparent response to the physical conditions.

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