- 5 - 



Ark. The Control of Plant Parasitic Nematodes in Arkansas , To (l) 



determine importance, distribution, and identity of root and foliar 

 parasitic nematodes associated with crop decline; (2) determine 

 role of nematodes in certain unsolved root disease complexes; (3) 

 determine host range of certain parasitic nematodes on field, fruit 

 and vegetable crops in order to make intelligent approach on rotation 

 control studies; and (4) develop and refine methods of control by 

 seed treatment, foliar nematocidal sprays, soil applications of 

 nematocides, and testing varietal resistance. 

 PI. Path. 380 (S-19) 



Calif. Development of Nematocides and Methods of Their Application to 

 Pre-Planting and Living Plant Sites as Influenced by Physical and 

 Chemical Properties of Fumigant , Nematode Species Involved. Physical 

 Structure of Soil, an d Environmental Factors as Soil Type. Moisture. 

 Compactness and Temperature . To (1) develop new, improved nemat- 

 ocides and evaluate nematocidal activity of chemicals received from 

 chemical companies and other sources; (2) evaluate influence of 

 soil type, compaction, moisture, and temperature on efficacies and 

 diffusion of chemicals; (3) determine efficacies of fumigants against 

 various life stages of different nematode species; (A) determine 

 phytotoxic properties,, if any, of chemicals; (5) study harmful or 

 beneficial residues and/or other effects in soils after using 

 fumigants as regards plant growth, yields, quality of produce; (6) 

 attempt to improve and simplify field-scale applicators; (7) evaluate 

 application schedules as regards row placement of chemicals at time 

 of bedding and at time of seeding; (8) study influence of application 

 depth on diffusion patterns; (9) determine feasibility of using 

 solid materials and water drenches; (10) develop improved methods 

 of application of nematocides. 

 PI. Nematol. 1626 



Calif. Collection and Identification of Plant Parasitic Nematodes and 

 Related Species ! To (1) collect, preserve, and identify plant 

 parasitic and related soil nematodes; (2) enlarge and maintain 

 present Nematode Survey Collection; and (3) prepare and publish 

 descriptions, reviews and revisions of nematode groups containing 

 plant parasitic species to make available information that will aid 

 in interpretation of problems of nematode biology and control. 

 PI. Nematol. 1629 



Calif. Biological Control of Plant Parasitic Nematodes , (l) Collect 



and identify organisms attacking plant parasitic nematodes in State 

 soils and other areas; (2) test pathogenicity of these micro- 

 organisms against plant parasitic nematodes under laboratory and 

 greenhouse conditions; (3) learn environmental and ecological 

 conditions favoring activity and pathogenicity of these organisms; 

 (4) develop cultural methods for economic control of plant parasitic 

 nematodes by these parasites or predators. 

 PI. Nematol. 1718 



