Britton, W. E., and Kirk, H. B. The Life History of the Walnut Weevil or Curculio. Report Conn. Agr. Expt. Station for 1912, page 240.
Brooks, Fred E. Snout Beetles That Injure Nuts. Bull. 128, West Virginia Agr. Expt. Sta., Morgantown, W. Va., 1910.
Chittenden, F. H. The Nut Weevils, Circular 99, Bureau of Entomology, U. S. Dept. of Agr., Washington, D. C., 1908.
Felt, E. P. Insects Affecting Park and Woodland Trees. Memoir No. 8, N. Y. State Museum, Albany, N. Y. 2 vols., 1905, 1906.
Gossard, H. A. Insects of the Pecan, Bull. 79, Fla. Agr. Expt. Station, Gainesville, Fla., 1905.
Herrick, G. W. Insects Injurious to Pecans, Bull. 86, Miss. Agr. Expt. Station, Agricultural College, Miss., 1904.
Hopkins, A. D. The Dying Hickory Trees. Circular 144, Bureau of Entomology, U. S. Dept. of Agr., Washington, D. C., 1912.
Kirk, H. B. The Walnut Bud Moth. Report Conn. Agr. Expt. Station for 1912, page 253.
A MEMBER: Early in the spring I noticed something on the hickory trees swollen and bright red in color, so that the trees were conspicuous from a distance. Later insects emerged which appeared to be these little gnats that fly in swarms.
DR. BRITTON: From the description I am not able to say what it was, but it was probably one of those gall flies, a great many species of which exist and which attack all kinds of plants. They do not, as a rule, cause very serious damage, and I can not suggest any particular remedy. Did it interfere with the growth of the tree?
A MEMBER: I noticed what seemed to be the same insect on the grape vines.
DR. MORRIS: I would call attention to one pest that is very destructive to hazels; unless watched closely it will produce serious injury. That is the larvae of two of the sawflies. Dr. Britton was unable to determine off-hand the species of the specimens I sent him, but you may know the sawfly larvae by their habit of collecting in a row like soldiers around the edge of the leaf and when the branch is disturbed, their heads and tails stand up. These sawfly larvae need looking after and can be killed by spraying. They usually collect on two or three leaves at a time.
I would like to ask about a bud worm that attacks the leaf of the hickory near the axil, sometimes very extensively, but not very injuriously. At the same time it makes deformities. Colonies of this insect select certain trees, for instance, the Taylor tree that you saw yesterday is infected with this particular bud larva. The base of a petiole becomes enlarged two or three times, and you will find one white worm at the bottom. This colony is confined to this one tree, and the very next tree adjoining the Taylor has its branches interwining, but is not bothered at all, so far as I can determine.
