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REGIONAL PROJECTS 



Nem?tology 



NC-39 Biology and Control of Plant Parasitic Nematodes , (l) 



To determine the distribution of nematodes within the region, 

 the damage caused, and the plants involved; (2) to assemble 

 permanent microscopic mounts of representative specimens for 

 identification and taxonomic studies, to be available to 

 workers within the region; (3) to initiate studies on the 

 life cycles, variability, feeding habits, and host-parasite 

 relationships; (4) to investigate means of control by chemicals, 

 crop rotation, resistant varieties and by protozoa, fungi, 

 and other natural enemies. 



Cooperating stations and agencies: Federal-grant projects - 



111., Minn., Nebr., Ohio. ARS 



NE-34 Biology and Control of Nematodes Associated With Plant 



Diseases . (l) To determine kinds of plant parasitic" nematodes 

 present, explore their ecological relationships, and assess 

 damage done by diseases they cause; (2) to clarify life histories 

 of important plant pathogenic nematodes, determine the influence of 

 environmental factors on their development and pathogenicity, 

 and clarify relationships between nematodes and other soil organisms 

 in causing plant diseases; (3) make available type materials ( of 

 pathogenic species for identification purposes; (4) devise control 

 measures for important diseases caused entirely by nematodes or 

 the development of which is influenced by nematodes. Host resistance, 

 host culture, antibiosis, and chemical treatment will be. given 

 primary consideration. 



Cooperating stations and agencies: Federal-grant projects - 

 Del., Maine, Md.. Mass., N. J., N. Y (Cornell), N.Y.(State), 

 Pa., R. I., W. Va., ARS 



S-19 Plant Parasitic Nematodes . To determine the distribution, 



identity and populations of the various nematodes associated with 

 plant decline, root malformation and specific plant diseases and 

 disease complexes in the southern States; (2) to determine the 

 range of variability in morphological and physiological characters 

 within nematode species that attack plants; (3) to determine life 

 histories, feeding habits, pathogenicity and environmental 

 relationships of nematodes associated with malformation and root 

 decline of crops grown in the South; (4) to determine the host 

 range of specific plant parasitic nematodes; (5) to determine, 

 for the purpose of developing control measures, the effect of 

 climate, soil conditions, cropping practices, and chemical treat- 

 ments on the abundance and activity of nematodes and microorganisms 

 associated with nematodes; (6) to determine the resistance of 

 definite species, varieties, and lines of crop plants to nematodes 

 and associated microorganisms in the soil. 



Cooperating stations and agencies: Federal-grant projects - 

 Ala., Ark., Ga., Ky., La., Miss., N. C, Okla., P. R., S. C, 

 Tenn., Tex., Va., ARS 





