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| Content Provider | Springer Nature Link |
|---|---|
| Author | Triltsch, H. |
| Copyright Year | 1997 |
| Abstract | During two years adultCoccinella septempunctata L. were sampled at two localities in cereals and at another location throughout the whole year in different habitats.Frequency of different food types was recorded using gut dissection. Food remains were classified into aphids, other arthropods, fungal spores, pollen, soil particles. Soil particles were relatively frequent only in early spring and pollen in late summer, whereas fungal spores were most frequent in both these periods. During ladybird reproduction in winter wheat, aphid remains were present in 76.9–91.7% of all individuals and surprisingly spores were again more frequent than remains of other arthropods. Cannibalism was rare. Food ofC. septempunctata was very uniform, because nearly always the same spores (Alternaria sp.) and other arthropods (Thysanoptera) were found. Additionally a semiquantitative analysis was performed with a simple scale of gut fullness. Only in certain cases significant positive correlation were determined between aphid density in the field and the calculated “feeding state” as well as frequency of aphid remains.Des adultes deCoccinella septempunctata L. ont été récoltés d’une part, pendant deux ans, dans des cultures de cérérales de deux localités, d’autre part dans différents habitats d’une autre localité au cours d’une année entière.La fréquence des différents types d’aliments a été notée à partir de la dissection du tube digestif. Les restes de nourriture ont été classés en pucerons, autres arthropodes, spores de champignons, pollen et particules du sol. Les particules du sol n’étaient relativement fréquentes qu’au début du printemps et le pollen à la fin de l’été tandis que les spores de champignons étaient très fréquentes pendant ces deux périodes. Durant la période de reproduction des coccinelles en culture de blé d’hiver, des restes de pucerons étaient présents dans 76,9 à 91,7 % de l’ensemble des individus et curieusement les spores étaient à nouveau plus fréquentes que les restes d’autres arthropodes. Le cannibalisme a été rarement observé. L’alimentation deC. septempunctata était très uniforme, puisque l’on a presque toujours trouvé les mêmes spores (Altenaria sp.) et les mêmes « autres arthropodes » (Thysanoptères). De plus, une analyse semi-quantitative a été effectuée en considérant simplement la quantité de nourriture trouvée dans le tube digestif. Ce n’est que dans certains cas qu’une corrélation positive significative a pu être trouvée entre la densité de pucerons dans le champ et la quantité de nourriture ingérée ou la fréquence des restes de pucerons dans le tube digestif. |
| Starting Page | 125 |
| Ending Page | 131 |
| Page Count | 7 |
| File Format | |
| ISSN | 00138959 |
| Journal | BioControl |
| Volume Number | 42 |
| Issue Number | 1-2 |
| e-ISSN | 15738248 |
| Language | French |
| Publisher | Springer Netherlands |
| Publisher Date | 1997-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioural Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Ecology, Evolution, Behavior and Systematics Agricultural and Biological Sciences |
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