Feeding substrate and temperature interplay determining infestations and losses by the sawtoothed grain beetle (Oryzaephilus surinamensis)

2021 ◽  
Vol 94 ◽  
pp. 101887
Author(s):  
Ahmed S. Hashem ◽  
Raul Narciso C. Guedes ◽  
Hagar S. Awadalla
Keyword(s):  
Oryzaephilus Surinamensis ◽  
Feeding Substrate

DISTRIBUTION OF THE MERCHANT GRAIN BEETLE, ORYZAEPHILUS MERCATOR (SILVANIDAE: COLEOPTERA) IN CANADA

1970 ◽  
Vol 102 (8) ◽  
pp. 1041-1047 ◽  
Author(s):  
S. R. Loschiavo ◽  
L. B. Smith
Keyword(s):  
National Survey ◽  
Related Species ◽  
Oil Content ◽  
Morphological Characters ◽  
Oryzaephilus Surinamensis ◽  
Stored Grain ◽  
Cereal Products ◽  
Oryzaephilus Mercator

AbstractA national survey shows that the merchant grain beetle, Oryzaephilus mercator Fauvel, has been present in Canada since at least 1925 and that it has become firmly established as a household pest of processed cereal products preferably of high oil content, but has not been reported from stored grain. A related species, the saw-toothed grain beetle, Oryzaephilus surinamensis (L.), infests both stored grain and processed cereal products. Illustrations are provided to show the morphological characters by which the two species may be recognized and separated.

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.

scholarly journals Ecology of colonizing populations of the figfly Zaprionus indianus (Diptera, Drosophilidae) in Porto Alegre, Southern Brazil

2005 ◽  
Vol 95 (3) ◽  
pp. 233-240 ◽  
Author(s):  
Norma Machado da Silva ◽  
Carina da Conceição Fantinel ◽  
Vera Lucia da Silva Valente ◽  
Vitor Hugo Valiati
Keyword(s):  
Niche Breadth ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Survival Strategies ◽  
Porto Alegre ◽  
Zaprionus Indianus ◽  
Feeding Sites ◽  
Substrate Choice ◽  
Oviposition Substrate ◽  
Feeding Substrate

Ecological parameters such as trophic niche overlap and niche breadth were computed from the frequency of all drosophilid species collected in 2001 and 2002, in the urban area of Porto Alegre city, Brazil. Independently of place, drosophilids community composition and components breeding or feeding sites, the highest frequencies of Zaprionus indianus (Gupta, 1970) were obtained during seasons with higher average temperatures, especially during summer. From a total of the 19,146 individuals of Z. indianus sampled, 80% were found in this season. The data of trophic niche breadth suggest a higher opportunism of adult flies in feeding substrate use, but the females are still selective in oviposition substrate choice. For the values of niche overlap, only for some species, did we find any correlation between these and species richness and/or number of resources, and the most of the correlation values considering breeding and feeding sites were positive. The colonization of Z. indianus in Porto Alegre could be leading to adjustments in the survival strategies of the resident species, but it is possible that many species have conditions for coexisting with the invader.

Quantitative dietary requirements of Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) for phenylalanine and tyrosine

1968 ◽  
Vol 46 (3) ◽  
pp. 469-473 ◽  
Author(s):  
G. R. F. Davis
Keyword(s):  
Relative Humidity ◽  
Normal Rate ◽  
Oryzaephilus Surinamensis ◽  
Adult Weight ◽  
Rate Of Development ◽  
Dietary Requirements ◽  
Emergent Adults

Oryzaephilus surinamensis (L.), reared on three holidic diets at 32 ± 2 °C and 75 ± 5% relative humidity, required a dietary source of phenylalanine, irreplaceable by dietary tyrosine. This insect also required a dietary source of tyrosine for normal rate of development. On diets containing 1.0 mg of phenylalanine per gram, it used supplementary glycine more effectively than supplementary tyrosine as a replacement for phenylalanine omitted from the diet. On diets containing 1.0 mg of tyrosine per gram, it used supplementary phenylalanine more effectively than glycine. Emergent adults weighed less with 1.0 mg of dietary phenylalanine per gram than with higher concentrations. Adult weight was unaffected by decreasing concentrations of dietary tyrosine.

scholarly journals LARVAE OF NEOTROMBICULA TALMIENSIS (SCHLUGER, 1955) (ACARIFORMES, TROMBICULIDAE) AND THEIR FEATURES PARASITISM ON NATURAL HOSTS

2020 ◽  
Author(s):  
A.B. Shatrov ◽  
Keyword(s):  
Feeding Mode ◽  
Bank Voles ◽  
Pale Pink ◽  
Highly Effective ◽  
Natural Hosts ◽  
Siberian Chipmunk ◽  
Feeding Substrate ◽  
Species Specific ◽  
Host Tissues

Parasitengonina mites being a highly diverse and specialized phyletic lineage of the higher Acariformes, possess small and simply organized larvae. These larvae show a highly effective feeding mode of the proteinaceous feeding substrate consisting of the pre-oral digested host tissues. This capability is a result of the stylostome formation and allows larvae to overcome easily a high ontogenetic threshold between the larval organization and that of post-larval phases. Larvae of N. talmiensis evolve an identically organized pale-pink stylostome during feeding on both bank voles and Siberian chipmunk that confirm a hypothesis of the genus- or even species-specific stylostome organization.

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