Introduction

Abstract

The chief hazard any garden plant has to endure is its owner or gardener. Moreover, many plants will suffer undue hardship from the publication of this handbook. It is human nature to read symptoms of an ailment and immediately assume it is your own affliction. Jumping to conclusions is as dangerous to plants as it is to humans. A sore throat does not necessarily mean diphtheria. Only a trained physician can diagnose probable diphtheria, and for positive identification a laboratory culture is necessary.