Abstract

Transmission of spores of Hirsutella rhossiliensis to juveniles of Heterodera schachtii (J2) was quantified in soil microcosms (17 cm 3 ) containing loamy sand (−60 mbar matric potential) or coarse sand (−20 mbar) at 20 C. Transmission measured as the probability (P) of a J2 acquiring at least one spore (as a function of numbers of spores × 10 3 per microcosm [S], was greater in loamy sand (P = [1.05S]/[S + 31]) than in coarse sand (P = −0.006 + 0.0016S). The value of P was constrained between 1 and 0. Difference to the effects of soil spore diameter on nematode motility and the probability of a nematode passing but not contacting a spore (...)

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