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Ne Ye Insect Vectors Involved in the Transmission of 
(State) Diseases of Vegetable Canning Crops. (1) Identify insect 
vectors of certain virus and bacterial diseases of 
vegetable crops. Study (2) method by which insects 
transmit specific diseases; (3) ecology of insect vector 
involved in relation to hosts in which pathogen over-winters. 
(4) Control insect-transmitted diseases of vegetables 
through utilization of a knowledge of insect vector and how 
it serves in etiology of disease. 
Ente 5 
N.C. Biolo and Control of Insects and Mites Affectin 
Vegetable Crops. To (1) develop better methods of 
controlling vegetable pests; (2) study effects of 
insecticides on injurious and beneficial insects and on 
crop yield and quality; (3) study life histories and 
ecalogy of vegetable pests; (4) determine importance of 
various species of insects and mites affecting vegetables in 
the state and ascertain their geographical and seasonal 
distribution; and (5) find out the insect vectors of plant 
diseases. 
Ent. 45 Coop. ARS 
Ohio Control of Soil-Inhabiting Nematodes, Fun Bacteria 
and Insects Affecting Vegetable Crops. To (1) determine and 
classify soil-inhabiting organisms responsible for economic 
loss on vegetable crops growing in Ohio soils, (2) devise 
means of controlling most destructive organisms, and (3) design 
and test equipment and application techniques for use_in applying 
various liquid and dry formmlations in the control of soil- 
inhabiting pest complex on vegetables. 
Bote, Ente, Agr. Engine 131 Coop. ARS 
Okla. Ecolo Seasonal Development and Control of Insect 
Pests of Spinach and Related Crops. ‘To (1) study biology 
and seasonal abundance of Hylemya cilicrura, Heliopthis sp., 
Myzus persical, Rhopalosphum pseudobrassicae, Trichoplusia ni 
Plutella maculipennis, etc. damaging greens crops; GB) test 
insecticides for control; (3) determine amount of residual 
insecticide on fresh, unwashed greens at different periods 
after treatment, and (4) determine effect of various food 
preparatory processes upon depreciation of residues on cropse 
Agr. Cheme Hort. 50h. 
