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Ky. A Study of Plant Pathogenic Nematodes and Their Effects on 



Crop Plants in Kentucky ^ To (l) learn how much and in what way 

 nematodes are a factor in crop production; (2) identify species 

 of nematodes concerned; (3) adapt and develop methods of handling 

 nematodes in experimental studies; (4) learn intercrop relations 

 of nematode diseases; (5) adapt and develop methods of con- 

 trolling nematode diseases. 

 Agron. 159 (S-19) 



La. Pathogenicity of Plant Parasitic Nematodes Occurring in 



Louisiana Soils" To (1) isolate and maintain pure populations 

 of various plant parasitic nematodes suspected of causing damage 

 to crop plants; (2) make controlled infestations on crop plants 

 with the pure populations of nematodes alone, in combinations 

 with other nematodes and in combinations with fungi, for deter- 

 mining the type and extent of damage causedj and (3; work out 

 possible rotations or other measures for control of these pests 

 based on above determinations of pathogenicity of various species 

 and strains of nematodes on various crop plants. 

 PI. Path. 815 (S-19) 



Maine Cultural and Chemical Control of Nematodes on Small Fruits 

 and Vegetables . To learn biology and control of nematodes on 

 strawberries, low-bush blueberries, and truck crops. 

 PI. Path. 93 (NE-34) 



Md. Occurrence. Distribution, Biology, and Control of Plant- 



Parasitic Nematodes &i Maryland . Learn (1) by survey the 

 occurrence, distribution and economic importance of plant- 

 parasitic nematodes in State; (2) life cycles, host ranges, feeding 

 habits, and pathogenic effects of certain plant-parasitic nema- 

 todes; (3) effects of light, temperature, water, and host nutrition 

 on nematodes; (4) phytotoxic effects and specificity of action 

 of nematocidal chemicals. 

 Bot. J-96 Coop. ARS 



Md. Biology and Control of Nematodes Associated with Plant Diseases , 



(l) Devise a method of testing and test chemicals for use as systemic 

 nematocides. Investigate (2) use of antibiotics and host resistance 

 as possible control measures for plant parasitic nematodes; (3) 

 effect of nematodes on some soil-borne diseases. 

 Bot. J-97 (NE-34) Coop. ARS 



Mass. Biology and Control of Nematodes Associated with Plant Diseases 



(1) Learn kinds of plant parasitic nematodes present in State, and 

 assay crop damage; (2) study influence of environmental factors on 

 important plant pathogenic nematodes, pathogenicity including physi- 

 ology of resistance; (3) devise and apply control measures against 

 nematode-incited diseases. 



Cranberry Expt. Sta. 144 (NE-34) 



