Sampling for the Detection of Stored-Product Insects Blaine Timlick blaine.timlick@grainscanada.gc.ca

Sampling All sampling involves uncertainty. The degree of uncertainty

depends upon the variability in the material, inexactness in carrying out procedures, and the number (size) of the samples taken. (Bicking 1967)

“Sampling theory and practice” “it is completely out of the question to assume that any

part of a lot has a composition exact to the entire lot. Thus the fraction of the lot that is accessible cannot be 100% representative of the entire lot.”

Sampling choices Measure the precision and accuracy of a sampling method Decide upon the precision and correctness of a given

sampling method

Sampling

Sampling for Insects in Stored Products Information for assurance of customer satisfaction

• Appropriate methods for accurate information • Appropriate information for decision making

Information for assurance to meet regulatory requirements

• Phytosanitary or Regulated pests

Sampling

Grain Sampling How grain is sampled How insects are detected

Insect Sampling Where to sample How and When to sample

Insect Trapping Types of traps

Grain delivery and sampling

Segregation and sampling for insects

Sampling – Receival and Movement

Sampling - Storage

Sampling - facilities

Sanitation

Detection

Trapping

Automated trapping

Automated trapping

Insect Identification and Training

Quality Control

Having procedures in place that are monitored and reviewed – how good are they working, can they be improved? Using mechanisms and techniques to sample for

insects Recording findings – reviewing to look for re-

occurances or where additional resources are required Recording actions – to determine effectiveness

(appropriate application methods, resistance)