| Abstrakt: |
AbstractThis study describes an image analysis method that reliably quantifies feeding damage by leaf beetle larvae (Alticaspp.) to Canada thistle leaf disks. Quantification is objective, uncomplicated, precise, rapid, and usable with any image analyzer. Image analysis of dried, pressed leaf disks is not recommended, as the amount of shrinkage of the eaten area upon drying varies with the amount eaten. Analysis of fresh material is advised. Image analysis of fresh leaf disks will be a useful method of comparing rates of consumption of two Alticaspecies, one of which is being considered as a new candidate for the biocontrol of Canada thistle, and also other insects with similar feeding habits. |
