Translations:Benutzer:Arian/Klett-Mini-Test/979/en

Beta beets (sugar and fodder beets, red beets) are only slightly self-compatible owing to nematode infestation in the root zone. Nematodes (stem and bulb nematode [Ditylenchus dipsaci]) belong among the principal causes of crop-rotation diseases. They are many-raced, attack nearly all cultivated plants and many weed species as well, and are long-lived — which is why a gap of four to six years must be maintained in the crop rotation before a beta beet species returns. Beta beets show a wide spectrum of damaging organisms: virus diseases (including yellowing disease [Beta-Virus 4]), fungi (including root rot, various fungi), as well as nematodes, aphids (Phytophagus), beet fly (Pegomya hyoscyami), pygmy mangold beetle (Atomaria linearis) and others. Infestation is partly variety- and weather-conditioned, but for the most part a consequence of inadequate soil hygiene and too narrow a spacing in the crop rotation.