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Nebr. Relation of Insects to the Transmission and Epidemiology 



of Plant Diseases . To (l) ascertain role of insects in trans- 

 mitting viruses and other disease producing entities of plants; 

 (2) determine basic insect-plant pathogen relationships; and (3) 

 develop control measures, including use of insecticides, cultural 

 practices and any other means effective in reducing build up of 

 epidemics due to insect activities. 

 Ent., PI. Path. 474 Coop. ARS 



N. J. The Relationship of Insects to Vegetable Diseases and Their 

 Control . (1) Investigate the role that certain insects play in 

 the transmission of diseases in vegetable crops in New Jersey; 



(2) determine which methods of control and what insecticides can 

 be used against these pests. 



Ent. 214 



P. R. Virus Diseases of Plants in Puerto Rico . To study virus 

 diseases of economic plants in Puerto Rico. 

 PI. Path. 48 



P. R. Virus Diseases of Weeds . To determine (l) identity of viruses 

 attacking weeds in P. R. ; (2) means of propagation of viruses of 

 weeds; and in cases where transmission is by insect vectors, to 

 identify insect vectors and relation between vectors and viruses; 



(3) host range of weed viruses in order to determine if plants of 

 economic value are susceptible; and (4) control methods if plants 

 of economic value are affected by weed viruses. 



PI. Path. 63 



Tex. The Detection and Identification of Plant Viruses and Their 



Arthropod Vectors . (1) Produce homologous antisera for detection 

 and identification of plant viruses in economic and weed host plants 

 utilizing phytoserological techniques; (2) detect presence of plant 

 viruses in suspect insect vectors; (3) learn possibility of utiliz- 

 ing phytoserological techniques as a means of surveying incidence 

 and distribution of destructive plant viruses in economic and non- 

 economic host plants; establish (4) a phytoserological virus iden- 

 tification laboratory: distribute arthropod vectors and correlate 

 data with incidence of virus diseases they transmit. 

 PI. Physiol. & Path., Ent. 1108 



W. Va. The Symbiotic Relationships Between Microorganisms and Insect 

 Vectors of Plant Diseases. To investigate insect transmission of 

 plant diseases as a distinct biological phenomenon fundamental 

 to general sciences of plant pathology and entomology, ©specially 

 to determine for cucumber beetles: (l) how cucumber wilt bacterium 

 survives in the insect body; (2) if symbiosis is involved; (3) if 

 bacteria are transmitted through eggs to larvae; (4) if bacteria 

 survive pupal period; and (5) if physiological condition or physical 

 environment of beetles influence interrelations of vector and 

 bacterium. 



PI. Path. 62 



