Initial efficacy of pyrethroids, inert dusts, their low-dose combinations and low temperature on Oryzaephilus surinamensis and Sitophilus granarius

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.

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The effect on the mortality of adult Cryptolestes ferrugineus (Stephens) (Coleoptera: Cucujidae), Sitophilus granarius (L.) (Coleoptera: Curculionidae) and Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) of interrupting low oxygen exposures with periods of elevated oxygen

Journal of Stored Products Research ◽

10.1016/s0022-474x(96)00029-x ◽

1996 ◽

Vol 32 (3) ◽

pp. 187-194 ◽

Cited By ~ 2

Author(s):

Simon T. Conyers ◽

Christopher H. Bell

Keyword(s):

Sitophilus Granarius ◽

Cryptolestes Ferrugineus ◽

Oryzaephilus Surinamensis ◽

Low Oxygen

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Thermal conductivity degradation of ceramic materials due to low temperature, low dose neutron irradiation

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2004.11.009 ◽

2005 ◽

Vol 340 (2-3) ◽

pp. 187-202 ◽

Cited By ~ 91

Author(s):

L.L. Snead ◽

S.J. Zinkle ◽

D.P. White

Keyword(s):

Thermal Conductivity ◽

Low Temperature ◽

Neutron Irradiation ◽

Low Dose ◽

Ceramic Materials

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Activity of four entomopathogenic nematode species against young adults of Sitophilus granarius (Coleoptera: Curculionidae) and Oryzaephilus surinamensis (Coleoptera: Silvanidae) under laboratory conditions

Journal of Plant Diseases and Protection ◽

10.1007/bf03356175 ◽

2006 ◽

Vol 113 (4) ◽

pp. 168-173 ◽

Cited By ~ 27

Author(s):

S. Trdan ◽

M. Vidrih ◽

N. Valic

Keyword(s):

Young Adults ◽

Entomopathogenic Nematode ◽

Nematode Species ◽

Sitophilus Granarius ◽

Oryzaephilus Surinamensis ◽

Laboratory Conditions

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

Bulletin of Entomological Research ◽

10.1017/s0007485300011949 ◽

1987 ◽

Vol 77 (3) ◽

pp. 457-466 ◽

Cited By ~ 12

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.

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