Hygroreceptors of adult sawtoothed grain beetles, Oryzaephilus surinamensis (L.) (Coleoptera, Cucujidae)

1972 ◽  
Vol 50 (8) ◽  
pp. 1147-1153 ◽  
Author(s):  
Richard T. Arbogast ◽  
Richard M. Roppel ◽  
Margaret Carthon
Keyword(s):  
Oryzaephilus Surinamensis ◽  
Sense Organs ◽  
Sensilla Basiconica ◽  
Humidity Response ◽  
Grain Beetles

Two types of sense organs are present on the antennae of adult sawtoothed grain beetles, Oryzaephilus surinamensis. Sensilla chaetica are present on all the antennal segments and sensilla basiconica are present on the three segments which compose the antennal club. The intensity of the beetles' humidity response was correlated with the number of sensilla basiconica remaining after amputation of various numbers of antennal segments. On the basis of their morphology and the results of the amputation experiments, it is concluded that at least some of the sensilla basiconica function in hygroreception.

Differentiating the Saw-Toothed Grain Beetle, Oryzaephilus surinamensis (L.), and the Merchant Grain Beetle, O. mercator (Fauv.), by Morphology of the Male Genitalia

1977 ◽  
Vol 60 (5) ◽  
pp. 1223-1226
Author(s):  
Alan R Olsen
Keyword(s):  
Male Genitalia ◽  
Median Lobe ◽  
Oryzaephilus Surinamensis ◽  
Grain Beetles ◽  
Adult Head

Abstract Male saw-toothed grain beetles (Oryzaephilus surinamensis) and merchant grain beetles (O. mercator) were dissected, and the major differences in their genitalia were reviewed. Differences in the morphology of the internal sac, setae of the lateral lobes, chitinous rods of the median lobe, and setae on the eighth sternite are illustrated with photomicrographs. The only other difference between the 2 species is the outline of the adult head. The dissection procedure is described briefly.

MORTALITY OF ADULT GRAIN BEETLES IN SAMPLE DELIVERY SYSTEMS USED IN TERMINAL GRAIN ELEVATORS

1977 ◽  
Vol 109 (2) ◽  
pp. 209-213 ◽  
Author(s):  
J. M. Bryan ◽  
J. Elvidge
Keyword(s):  
Delivery Systems ◽  
Tube Length ◽  
Cryptolestes Ferrugineus ◽  
Oryzaephilus Surinamensis ◽  
Insect Infestation ◽  
Delivery Tube ◽  
Mortality Pattern ◽  
Grain Elevators ◽  
Grain Beetles ◽  
L 22

AbstractThe detection of insect infestation by the Canadian Grain Commission is decreased in efficiency by the mortality of adult beetles in the pneumatic sample delivery systems used in terminal elevators in the Vancouver, B.C., area. Dead insects are difficult to see while grading the grain and cannot be extracted by Berlese funnels.The level of mortality varied with the species of beetle and the system tested, but not with the type of grain. In one system the following mortalities were found: Cryptolestes ferrugineus (Stephens), 73%; Oryzaephilus surinamensis (L.), 65%; Tribolium castaneum (Herbst), 65%; and Sitophilus granarius (L.), 22%. C. ferrugineus, the most important insect infesting Canadian grain, sustained an average mortality of 55% in the five systems tested. No consistent mortality pattern was found among the systems with respect to delivery tube length, number of turns, or approximate grain speed. Berlese funnel extraction was found to be inefficient for O. surinamensis and inconsistent for S. granarius.

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.

scholarly journals Scanning electron microscopy of the antennal sensilla in female Culicoides paraensis (Diptera: Ceratopogonidae)

1989 ◽  
Vol 84 (4) ◽  
pp. 463-469 ◽  
Author(s):  
M. L. Felippe-Bauer ◽  
P. G. Bauer ◽  
F. C. Silva Filho
Keyword(s):  
Electron Microscopy ◽  
Host Preference ◽  
Type I ◽  
Antennal Sensilla ◽  
Sense Organs ◽  
Biting Midges ◽  
Sensilla Basiconica ◽  
Sensilla Trichodea ◽  
Scanning Electron

We studied by sanning electron microscopy the number, types, structure and distribution of the antennal sensilla of the medical important ceratopogonid Culicoides paraensis (Goeldi). There are about 174 sense organs on the antenmal flagellum which are classified as sensilla chaetica; sharp-tipped and blunt-tipped (type I and II) sensilla trichodea; sensilla basiconica; sensilla coeloconica; sensilla ampullacea and styloconic-type sensilla. The role of antennal sensory organs are discussed regarding the host preference of the biting midges.

Humidity Response of Adult Oryzaephilus surinamensis (Coleoptera: Cucujidae) 1

1972 ◽  
Vol 1 (2) ◽  
pp. 221-227 ◽  
Author(s):  
Richard T. Arbogast ◽  
Margaret Carthon
Keyword(s):  
Oryzaephilus Surinamensis ◽  
Humidity Response

Comparative studies on the sense organs on the antennae and maxillary palps of selected male culicine mosquitoes

1971 ◽  
Vol 49 (2) ◽  
pp. 235-239 ◽  
Author(s):  
Susan McIver
Keyword(s):  
Carbon Dioxide ◽  
Aedes Aegypti ◽  
Comparative Studies ◽  
Culex Pipiens ◽  
Sense Organ ◽  
Sense Organs ◽  
Sensilla Basiconica ◽  
Aedes Atropalpus ◽  
The Difference ◽  
Maxillary Palps

The sense organs on the antennae and maxillary palps of male Aedes atropalpus (Coquillett), Aedes aegypti (L.), Culex territans Walker, and Culex pipiens L. are similar to those observed on female culicines including water, olfactory, and carbon dioxide receptors. Although males have the same variety, they have fewer of each type of sense organ. The difference in number of any one type of sense organ is more variable in the female than the male except for the sensilla basiconica.

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