Occurrence, distribution and management of Heterodera schachtii in Michigan: With special reference to Pasteuria as a biological control agent

Heterodera schachtii Schmidt, 1871 (Nemata) is one of the most important plant-parasitic nematodes affecting sugarbeet production in Michigan. It is responsible for reducing both sugar content and crop yield. This Master of Science Degree thesis consists of the following three components: (1) A survey for the detection of H. schachtii in Michigan sugarbeet producing areas. The project was done in collaboration with Monitor and Michigan Sugar Companies. The 1998 survey resulted in the confirmed detection of H. schachtii in six Michigan counties. (2) A nematicide trial was used to evaluate the efficacy of two non-fumigant, one fumigant, and one bio-nematicide for the control of H. schachtii. The data suggest that there is a potential for DiTera...