<p>The host/parasite system <em>Lolium perenne</em> L./ <em>Tylenchorhynchus dubius</em> (Bütschli, 1873) Filipjev, 1936 was studied in experiments and by simulation, to elucidate the nature and functioning of the relationship between pasture and ectoparasitic nematodes.<p>The influence of temperature and soil moisture on the system and the incidence of tolerance and resistance in the host were studied in experiments under controlled conditions.<p><em>A</em> mathematical simulation model was developed for the host/parasite system; preliminary models for the population dynamics of the nematode and the influence of the nematode on plant growth are presented.<p>Measurements and simulations indicate that the ratio of nematode numbers to young roots is a main determinant of the effect of the nematodes on plant growth. The role of <em>T.</em><em>dubius</em> and other ectoparasitic nematodes in the failure of reseeded pastures is discussed.
|Qualification||Doctor of Philosophy|
|Award date||18 Sep 1990|
|Place of Publication||S.l.|
|Publication status||Published - 1990|
- plant pests