Journalartikel

Jahr der Veröffentlichung: 1985

Seiten: 51-55

Zeitschrift: Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz

Bandnummer: 58

Heftnummer: 3

ISSN: 0340-7330

DOI Link: https://doi.org/10.1007/BF01903081

Verlag: Blackwell

Abstract: 
The rose-grain aphid, M. dirhodum (Wlk.), lives on Rosa spp. as winter hosts and on Gramineae as summer hosts. The planting of roses along roadsides and highways may be of importance in connection with the migration of the aphids to cereals. In March 1982 the nymphs hatched from eggs, which were laid in autumn on long shoots. One or 2 days after hatching they fed on buds in batches up to 15 individuals. Later they dispersed on the host plants. The nymphal mortality of the 1st generation was high, namely about 79%. For further population development the number of fundatrices was less important due to their high reproduction capacity. Nymphs and adults of the 1st generation often changed their feeding site on the shoots. The specimens of the 2nd and 3rd generation were more stationary and formed dense colonies. The population density drastically increased during the 3rd generation. The development of the aphid populations on the primary host took place during 2-3 generations and lasted until the beginning of June, when the winged forms left the host plant. In the 2nd generation, i.e., at the beginning of May, the 1st emigrants appeared and the size of the aphid colonies increased up to 115 individuals. Most colonies consisted of < 11 aphids, 30.9%. Natural enemies were present in large numbers during the end of May when the populations of aphids decreased due to emigration. They did not influence the density of aphid colonies, except the predacious larvae of hover-flies. Trophobiosis between ants and rose-grain aphids was not observed on the primary host plant.

Harvard-Zitierstil: GRUPPE, A. (1985) OBSERVATIONS ON THE DEVELOPMENT OF POPULATIONS OF METOPOLOPHIUM-DIRHODUM (WLK) ON THE PRIMARY HOST IN SPRING, Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz, 58(3), pp. 51-55. https://doi.org/10.1007/BF01903081

APA-Zitierstil: GRUPPE, A. (1985). OBSERVATIONS ON THE DEVELOPMENT OF POPULATIONS OF METOPOLOPHIUM-DIRHODUM (WLK) ON THE PRIMARY HOST IN SPRING. Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz. 58(3), 51-55. https://doi.org/10.1007/BF01903081