CATALOG 1952-1953 475

 PT. 507.-Plant Disease Collection. 6 hours laboratory. 2 credits. Pre-
requisite: PT. 434. Offered 1.
 The collection, identification, and preservation of plant diseases and fungi, stressing
those of economic importance in Florida and those possessing distinctive taxonomic
characteristics.
 PT. 508.-Plant Disease Collection. 6 hours laboratory. 2 credits. Pre-
requisite: PT. 434. The second half of PT. 507-508. Offered 2.

 PT. 509.-Methods in Plant Pathology. 1 hour and 6 hours laboratory.
3 credits. Offered 2.
 Technical equipment and the manner of its operation for the acquisition and evalu-
ation of experimental data.
 PT. 511.-Diseases of Subtropical and Tropical Plants. 1 hour and 6 hours
laboratory. 3 credits. Offered 1.
 Diseases of crop plants growing in tropical America, such as avocado, banana, cacao,
citrus, coconut, coffee, guava, mango, pineapple, sugar cane, tobacco, and others at ele-
vations.
 PT. 522.-Bacterial Diseases of Plants. 1 hour, and 6 hours laboratory.
3 credits. Offered 1.
 The development and present knowledge of plant diseases caused by bacterial
pathogenes correlated with the investigation by experimental methods of a selected
disease.
 PT. 533.-Physiology of the Fungi. 1 hour, and 6 hours laboratory. 3
credits. Offered 2.
 Physiological studies of growth characteristics of fungi on various media in regard
to their respiration, penetration, reaction, reproduction and response to variable nutrient
media, light, temperature, gas concentrations, moisture, and antibiotics.
 PT. 534.-Industrial Mycology. 1 hour, and 6 hours laboratory. 3 credits.
Additional prerequisite: PT. 434. Offered 1.
 The fundamentals of conditions of preservation and deterioration of domestic and
commercial products, as pertaining to the identification, pathogenicity, propagation and
control of associated fungi.
 PT. 535.-Virus Diseases of Plants. 1 hour and 6 hours laboratory. 3
credits. Offered 2.
 Symptoms, range, importance, transmission, properties, classification and control of
plant viruses as applied to Florida.
 PT. 555.-Seminar. 1 hour. 1 credit. Offered 1, 2.
 Presentation and discussion of literature, methods and research pertaining to plant
diseases.
 PT. 570.-Research in Plant Pathology. 1-2 hours, and 6-12 hours labora-
tory. 3-6 credits. Offered 1, 2, 3.
 Methods of research in plant pathology applied to life histories of parasitic organ-
isms in relation to the host plant and environmental factors influencing the development
of diseases.


The statement "Offered 1" means offered first semester; 2, second semester; 3, summer session.