may be particularly
susceptible to spraying especially in this concentrated form such as we
used. There were no Rockville trees in any of the other plots, so we
have no way of knowing whether the Lindane, BHC or Toxaphene would have
done the same or not.

PRESIDENT MacDANIELS: The next paper, the last paper of the afternoon,
is Control of Insects Injuring Nut Trees, by Howard Baker, U.S.D.A.
Bureau of Entomology and Plant Quarantine, Beltsville, Md.

MR. BAKER: Mr. Chairman, members of the Northern Nut Growers
Association: It is a great deal of pleasure to be back here speaking
before a group of nut growers. Back some years ago my first assignment
to a station of which I had charge was an investigation to count insects
in Louisiana and Eastern Texas, so it is a pleasure to be back before a
group of nut growers.

Insect Enemies of Northern Tree Nuts

HOWARD BAKER, _U.S.D.A., Agr. Res. Admin., Bureau of Entomology and
Plant Quarantine_

The small number of requests for information on insect pests of northern
tree nuts received in the Bureau of Entomology and Plant Quarantine is a
strong indication that such pests are of little concern to northern nut
growers. This is fortunate, because intensive, all-season spray
programs, such as are necessary to produce most other crops without
serious losses due to insect injury, are laborious and expensive and not
always as effective as desired. However, as your acreage is increased
and as your trees become older and larger, insect problems are likely to
increase in number and intensity and require more of your thought and
attention.

A somewhat similar situation prevailed in the pecan industry at one time
in the South. I well remember the statement of one of the larger pecan
growers in Louisiana to the effect that all the pleasure of growing
pecans would be gone the day he had to start spraying to control insects
and diseases. Only a short time later it became necessary for him to
initiate a regular spray program. He still took great pride in growing
pecans, however. It is well, therefore, for you to watch your trees
closely for insect damage and keep informed concerning the habits and
control of the species that show up in your plantings or in those of
your neighbors.

Because of the scattered nature of the northern nut industry, the small
size of most plantings, and the more pressing demands for information on
the control of pests of more intensively planted crops,