THE RESPONSE OF HOLOCYCLIC POPULATIONS OF CEREAL APHIDS (HOM, APHIDAE) TO THE SOWING DATE OF WHEAT - WITH OBSERVATIONS ON THE EFFECTS OF HEAVY PRECIPITATIONS - Research portal of Justus Liebig University Giessen:

Journal article

THE RESPONSE OF HOLOCYCLIC POPULATIONS OF CEREAL APHIDS (HOM, APHIDAE) TO THE SOWING DATE OF WHEAT - WITH OBSERVATIONS ON THE EFFECTS OF HEAVY PRECIPITATIONS

Authors list: BASEDOW, T

Publication year: 1987

Pages: 127-133

Journal: Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz

Volume number: 60

Issue number: 7

ISSN: 0340-7330

DOI Link: https://doi.org/10.1007/BF01907494

Publisher: Blackwell

Abstract:
On plots (25 m2) sown at different dates it was tested from 1982 to 1984 near Kiel (FRG) [East Germany] whether the sowing date would result in different levels of infestation of wheat by holocyclic cereal aphid populations. Aphids were too scarce to obtain results in 1982, and in the subsequent years Sitobion avenae F. was the only species being abundant. In winter wheat (var. "Diplomat"), holocyclic S. avenae did not respond numerically to the sowing date. The maximum of attack, being equal in all sowing dates, occurred in growth stage 75. Small differences between sowing dates could be explained by the different abundance of natural enemies. In spring wheat (var. "Kolibri") significant differences between sowing dates were observed, the earliest sown plots being attacked most heavily by S. avenae. The maximum of attack occurred in growth stage 71, mostly. Heavy precipitations proved to diminish significantly the numbers of S. avenae per head at milky ripeness (GS75), but not at GS71. Numbers of Rhopalosiphum padi (L.) were not influenced significantly by the amount of precipitations falling during the observations. But precipitations and 8 other factors considered failed to explain the differences between sowing dates of spring wheat concerning the attack by S. avenae. It is assumed, therefore, that the physiological conditions of the wheat plant were governing the aphids'' reproduction. The differences concerning the attack of winter wheat, apparently existing between holocyclic and prevailingly anholocyclic populations of S. avenae, are stressed.

Citation Styles

Harvard Citation style: BASEDOW, T. (1987) THE RESPONSE OF HOLOCYCLIC POPULATIONS OF CEREAL APHIDS (HOM, APHIDAE) TO THE SOWING DATE OF WHEAT - WITH OBSERVATIONS ON THE EFFECTS OF HEAVY PRECIPITATIONS, Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz, 60(7), pp. 127-133. https://doi.org/10.1007/BF01907494

APA Citation style: BASEDOW, T. (1987). THE RESPONSE OF HOLOCYCLIC POPULATIONS OF CEREAL APHIDS (HOM, APHIDAE) TO THE SOWING DATE OF WHEAT - WITH OBSERVATIONS ON THE EFFECTS OF HEAVY PRECIPITATIONS. Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz. 60(7), 127-133. https://doi.org/10.1007/BF01907494

SDG Areas