Kye 
Mich. 
Mont. 
Nebr. 
Ohio 
Ey ae 
Transmission of Virus Diseases of Field Crops by Insects 
and Mites. To learn (1) which insects and mites transmit virus 
diseases of field crops; (2) entomological factors influencing 
virus transmission of these diseases; (3) host naturally infected 
by selected viruses transmitted by insects or mites. (4) Find 
new methods and improve and simplify present methods of achieving 
above objectives. 
Ent., Bot., Agron. 1010 
Insect Vectors of Crop Plant Diseases. To (1) determine 
insect vectors of aster yellows on potatoes, lettuce, carrots, 
gladiolus, etc.; (2) study bionomics of species concerned; in- 
cluding life history, migration, food plants, ecology, and con- 
trol; (3) study mechanics of disease transmission by species under 
study; (4) make inoculation experiments with various virus diseases, 
using accurately determined species or races of insects; and (5) 
by mass transfers of infected insects to non-infected plants of 
the same and of different species. 
Ent. 78 
Viroses of Sweet and Sour Cherries in Montana. To study the 
occurrence, symptoms, spread and control of viroses of sweet and 
sour cherries in Montana, especially little cherry and bud and 
scion perpetuated diseases. 
Bot. & Bact. MS 830 
Relation of Insects to the Transmission and Epidemiology of 
Plant Diseases. To (1) ascertain role of insects in transmitting 
viruses and other disease producing entities of plants; (2) deter— 
mine basic insect plant pathogen relationships. and (35 develop 
control measures, including use of insecticides, cultural practices 
and any other means effective in reducing build up of epidemics 
due to insect activities. 
Ente, Pl. Path. ATh 
Virus and Virus-Like Diseases of Tree Fruit.--5. Transmission 
Viruses Affect Tree Fruits, and Their Insect Vectors. 
1) Find and identify vector(s) of each of several important viruses 
causing diseases in stone fruits. Study insects to learn means of 
application of control measures. Study insect transmission which 
provides means of separating virus complexes. 
Ent., Pl. Pathe, Pomol. 134-5 (NE-14) 
A Study of Possible Vectors of the Oak Wilt Disease Organism. 
To (1) ascertain the species of insects, if any, that are attracted 
to Chalaramats; (2) if suspected vectors are found, determine if 
they carry the oak wilt organism either within or upon their bodies; 
and (3) find if they can transmit the organisms to healthy oaks. 
Ent., 96-3 (NC=22) 

