- 6 - 



Conn. Root Injuries by Nematodes and Root Diseases . Study 



importance of nematode injuries to root rots by testing possible 

 roles: primary causal agent, as a secondary invader, as an additive 

 invader, and as a synergistic agent <«hose presence is necessary 

 before another injury can occur. 

 PI. Path., Bot. 653 



Del. The Control of Plant Parasitic Nematodes by Host Resistance . 



Cultural Practices, and Chemicals . (1) Learn effect of cultural 

 practices and chemical treatment of soil on: inoculum potential 

 of phytopathogenic nematodes present in Coastal Plain soils; 

 incidence and severity of plant diseases caused by these organisms; 

 subsequent growth of crop plants; (2) develop soybean and grain 

 varieties possessing resistance to prevalent species of root-knot 

 nematodes in Coastal Plains soil, and learn mechanism of this 

 resistance. 



PI. Path. 15-P (NE-34) 



Fla. Identity and Distribution of Soil Nematodes in Florida . To 



(l) identify the more common species that make up nematode fauna 

 of Florida soils and investigate their comparative abundance in 

 different soil types and in different regions of the State; (2) 

 provide drawings and other information useful in preparation of keys 

 and laboratory guides, which will aid in recognition and study of 

 species most commonly encountered in Florida; and (3) provide at 

 Gainesville a permanent collection of nematodes and of plant 

 specimens showing nematode injury that can be used as reference 

 material and for teaching purposes. 

 Ent., Soils 695 



Ga. The Evaluation of Chemical Compounds as Nematocides and Their 



Phytotoxicity to Agricultural Crops . To (1) test chemicals 

 having prospective nematocidial value for their efficacy on general 

 and select nematode populations; (2) develop special soil fumigation 

 methods for different nematode species as different crops may require; 

 and (3) test adaptability of nematocides and soil fumigation methods 

 in cooperation with crop specialists on practical production basis. 

 Nematol., Agron., PI. Path., Hort. 79 (S-19) 



111. Feeding Habits and Biological Significance of Plant-Parasitic 



and Predaceous Nematodes' ! (1) Learn feeding habits and food sources 

 of nematodes to know which species are parasites of plants and which 

 are predators that destroy other nematodes; (2) identify and prepare 

 a reference collection of nematodes studied in this project; (3) 

 establish cultures of nematodes for use in experimental studies; (A) 

 learn the significance of these nematodes in causing plant diseases 

 in biological control of harmful nematodes; (5) develop improved 

 methods of achieving objectives. 

 PI. Path. 68-380 (NC-39) 



