May 31,1924 
The Cambium Curculio 
385 
LIFE CYCLE AND NUMBER OF GENERATIONS 
Snapp found that in Georgia there are two generations of beetles annually; 
in West Virginia, on the other hand, there is but one. 
Jenne recorded for 78 individuals the entire life cycle from the deposition 
of the eggs to the emergence of the adults from the ground. These records are 
given in Table IV. 
Table IV.— Time required by the cambium curculio for completing its life cycle 
at Gainesville , Ga ., 1910 
Number 
of days 
Number 
of 
insects 
Number 
of days 
i 
! Number 
1 Of 
j insects 
Number 
of days 
Number 
of 
insects 
35 
1 
43 
9 
51 
1 
36 
1 
44 
5 
52 
1 
37 
3 
45 
4 
53 
1 
38 
6 
46 
3 
56 
1 
39 
10 
47 
3 
40 
3 
48 
5 
41 
10 
49 
4 
42 
7 
NATURAL ENEMIES 
At French Creek, W. Va., the adult of a small hymenopterous parasite was 
found hovering around a larva of the cambium curculio under the bark of a tree. 
It was believed to be ovipositing in the body of the curculio larva. The specimen 
was captured and determined later by R. A. Cushman of the Bureau of Ento¬ 
mology as Thersilochus conotracheli Riley. Thomas H. Jones reports that he 
has reared from cotton bolls infested by larvae of this curculio from New Roads, 
La., specimens of a tachinid fly determined by Dr. J. M. Aldrich as Myiophasia 
globosa Townsend. Since both the species mentioned are known to parasitize 
Conotrachelus larvae, it is probable that they were attacking the larvae of 
anaglypticus. 
METHODS OF CONTROL 
Where this curculio attacks peaches there is little doubt that it will yield to 
jarring, spraying, and other control methods used against the plum curculio. 
In attacking the fruit the habits of the two species are so similar that separate 
treatments will not be called for. As a precaution against enlargement of bark 
wounds in fruit and other valuable trees by the larvae, the edges of fresh wounds 
made in the bark should be pared smooth and a heavy coat of white-lead paint, 
or some reliable tree paint, applied to all the injured parts. Such a coat of paint 
has been found effective in preventing the beetles from laying their eggs about 
the wounds. 
SUMMARY 
Conotrachelus anaglypticus is a rather common species from Massachusetts to 
Florida and its range extends as far west as Iowa, Kansas, and Texas. 
The species feeds in a great variety of situations. The beetles frequently 
occur on peach trees in company with those of the plum curculio, and the larvae 
have been found attacking peaches, cotton bolls, and the cambium and inner 
bark of many kinds of fruit, shade, and forest trees. In attacking the cambium 
of trees they work around the edges of wounds, retarding the healing process 
and enlarging the injured areas. 
94527—24t-7 
