- 30 - 



Wis, Poplar Diseases and Disease Resistance , (l) Study 



resistance to diseases and insects, rooting ability, growth 

 rate, tree types, wood quality and adaptability of poplars 

 to State conditions; (2) clarify etiology, epidemiology, and 

 economic importance of each disease and particularly of stem 

 cankers, 



PI. Path. 1026, Coop. FS 



DISEASES OF ORNAMENTALS 



Ga. A Comparison of Different Rootstocksof Certain Ornamentals 



with Particular Reference to Date of Flowering. Resistance to 

 Unseasonable Cold, and Resistance to Diseases and Insects . (1) 

 Learn effects of different, compatible root stocks on date of 

 flowering, resistance to unseasonable cold, disease and insect 

 resistance, and general adaptability of certain ornamentals; 

 (2) improve existing varieties of ornamentals by utilizing 

 information obtained. 

 Hort. 332 



Hawaii Diseases of Orchids in the Territory of Hawaii , (l) 

 Characterize disease on the various genera and species of 

 orchids; (2) identify causal agents; learn (3) -host ranges; 

 (A) environmental factors necessary for infection and develop- 

 ment of disease; (5) practical means of prevention and control. 

 PI. Path. 701.4 



La. Cause and Control of Root. Stem. Leaf, and Flower Diseases 



of Certain Ornamental Plants . To study the diseases of 

 ornamental plants and methods for their control, in answer to 

 demand for information in Louisiana and in the South on this 

 subject. 



PI. Path. 511 



Md. The Nature and Control of Root Rots Involved in Decline 



of Boxwood and Other Woody Ornamental Plants in Maryland. 

 Learn if decline and death of boxwood and other woody orna- 

 mentals is caused primarily by a soilborne organism or a fungus- 

 nematode complex. 

 Bot. J-99 



