ey tes 
Gae Sweet Potato Insects and Their Control. Learn insect 
pests responsible for damage to foliage ‘and roots of sweet 
potato and develop methods of control. 
Ent. 68 Coop. ARS 
Gae A Stu of the Relationship of Insects to the 
Transmission of a New Sweet Potato Mosaic Virus. Learn 
(1) if an insect is the vector of the causative virus of 
sweet potato mosaic; (2) if s0, when it occurs on 
plantings and at what period transmission occurs. 
(3) Establish a control measure for the vector. 
Ente 221 Coope ARS 
Lae Sweet Potato Weevil Studies in Field and Storage and of 
Soil and Foliage Insects Affecting Sweet Potato Vines and 
Roots. (1) Develop economic insecticide control measures 
applicable to soil pests or foliage feeding insects. 
(2) Study any resistance of potato insects to commonly used 
chlorinated compounds and test materials having a different 
mode of action. (3) Continue studies on insecticides used 
to control potato weevil in storage. (4) Test potato 
varieties for possible resistance to insect damage. (5) Study 
biology and ecology of potato flea beetle and other root and 
foliage feeding forms. (6) Learn residue values of 
insecticides on or in edible product. (7) Develop better 
insecticide application methods. 
Ente, Hort. 47 
Lae A Study of Insect Vectors of Internal Cork and of 
Foliage Feeding Insects of Sweet Potato. Learn vector(s), 
responsible for transmission of internal cork of sweet 
potatoe Study biology and ecology of vector to learn 
methods of attack for its control. Develop control measures 
for vector. Learn effect of foliage feeding insects on 
yield and quality. 
Ent. 869 
Maine Wireworm Control in Relation to Modern Production 
Methods. To obtain information on control of wireworms in 
potato land consistent with modern mechanized agriculture, 
especial attention being given to soil insecticides and 
fumigants lending themselves to mechanical application. 
Ent. fl 
