TABLE 1.

Contamination rates of naturally infested seed lots used for the 1999 and 2000 field experiments

Expt yrSamplingaNo. of positive samplesMPN in 100 seedsbConfidence intervalb
19991 batch of 50011.10.3-2.7
5 batches of 1003
5 batches of 101
20005 batches of 80030.1<0.1-0.3
  • a Number of batches each containing a defined number of seeds.

  • b Most probable number (MPN) and associated confidence interval were obtained from reference tables (36).