Ohio 
Utah 
Vae 
Vae 
hes 
Factors Influencing the Incidence of Apple Insects and 
Mites in Different Orchards and the Possible Utilization of 
these Factors in Control Programs. To (1) study underlying 
causes for variation in insect and mite prevalence and 
damage in orchards; and (2) integrate, if possible, into 
orchard practice that which may be found through the first 
objective, to supplement and reduce present chemical 
control programs. 
Ente 22 
Orchard Rootstocks Investigations. To secure better 
adapted, hardier, higher yielding, longer lived, earlier 
bearing, disease and insect resistant rootstocks for 
orchard fruits for Utah conditions. 
Horte 339 
The Control of Mites and Insects on Fruit Trees. 
Evaluate available miticides in control of mites on fruit 
trees, learn optimum time and rate of application and their 
effect on other harmful and beneficial insects in orchards. 
Fit more effective miticides into well rounded spray 
program by integration mite control program with best control 
for othe insects. Study habits and distributions of species 
in State to learn importance of species found on fruit trees. 
Ente, Hort. 431 
Breeding New Varieties of les Especi Ada: 
Co fe} &e (1) Develop new varieties of apples 
well adapted for commercial production; study types late in 
season of blooming, resistant to disease and insects. 
(2) Conduct fundamental work including studies of pollination 
values and cytological relations of Virginia apple varieties 
and production of polyploid types of apples. 
Hort. 86003 
Susceptibility of Codling Moth to DDT and to a New 
Nematode Disease. (1) Learn extent of codling moth resistance 
to DDT in apple orchard in northern Virginia, and the order 
of such resistance. (2) Compare characteristics of resistant 
and non-resistant strains. (3) Improve control of resistant 
strains by insecticides and by disseminating a new nematode 
disease of the larvae. 
Ent. 86005 
