TABLE OF CONTENTS 
PART I. 
Introduction. 89 
The Lettuce Industry in North Carolina. 89 
Characteristic Symptoms of Sclerotiniose. 91 
History of Sclerotiniose in America. 92 
Amount of Damage.. 95 
Amount of Damage in North Carolina. 96 
Cursory Description of Sclerotiniose. 96 
The Fungus that Causes the Disease. 99 
Morphology. 99 
The Mycelium. 99 
The Attachments. 103 
The Gonidia. 103 
The Sclerotia: shape, size, color, structure, etc. 104 
Germination of the Sclerotia. 105 
The Ascophore: stipe, disk, stroma, asci, spores...,. 106 
The Species of the Fungus. 108 
Physiology. 108 
The Mycelium. 108 
Media Relations: Temperature Relations: Longevity: Chemicals, Toxicity, 
etc., Conidia Production. 108 
The Sclerotia: location, number, media relations, temperature, maturity, 
longevity, germination conditions. 114 
The Ascophore, light and heat relations, etc. 119 
Spores: ejection, germination in media, longevity; infection direct, indirect. 120 
Parasitism and Saprophytism. 125 
Hosts. 128 
Field Observations. 130 
General Relations of the Fungus in Nature. 131 
Attempts to Control the Disease. 132 
Practical Considerations. 136 
Botrytis and Sclerotinia. 137 
PART II. 
A Practical Test of a Curative Treatment. 139 
