va eed 
; : k 
through foresters and forest entomologists and the necessity for babes 
to correlate silvicultural and management principles with insect con 4 
{ 
W. D. Edmonston reports, in connection with the Kaibab control io 
in Arizona, that 64 experimental trees have been cut, --seven groups whic a a 
in size from seven to thirty inches D. B. H.; the bark varies from one-ha 
inch to three inches in thickness. On June 12 broods of the Black Hills beetle 
were in all stages--larvae, smail to full grown, prepupal larvae and pupae, as 
well as a few immature young adults; these latter were rare. Parent adults in 
many cases are found alive and working so far as grooving the wood is concerned. 
fll eggs have hatched and some very small larvae are found. Control by suncur- 
ing is working very well; the mortality of the broods will be very heavy, and 
perhaps complete. Some of the logs and trees have been turned and show heavy 
mortality, on half, and in some cases tiro-thirds, of the bark surface. In some 
cases every living thing was dead, even under 2-1/2 inches of bark; parent 
adults, larvae, pupae, Dipterous larvae and small cerambycid larvae all died 
under twelve days exposure in the trees cut where the exposure was favorable. 
Most of the group cuttings would be considered as growing in mixture with other 
species, but in some cases the groups are surrounded by pines and not in mix- 
ture. 
Dr. H. E, Burke reports on June 17 that a preliminary examination of the 
piled slash in the Stanislaus Slash Disposal Area in California indicates that 
very few insects of primary importance breed in slash which is small enough to 
pile. The slash piled in the Stanislaus area is mostly sugar pine and white 
fir under four inches in diameter. There are some piles of yellow pine and 
incense cedar of about the same diameter. Over 90 per cent of the insects © 
breeding in the slash of the area belong to species of Chrysobothris which are 
not considered at all dangerous. However, this is only one case; in another 
area under other conditions the results might be vastly different. 
Dr. Burke also reports that the European poplar and willow borer 
(Cryptorhynchus lapathi L.) is now in California, where it is doing extensive 
damage this season to a block of Carolina poplar trees in a nursery at San 
Mateo. So far as can be determined it was introduced in a shipment of nursery 
stock from one of the Eastern States. 
S..A. Rohwer has just returned from a trip to Nebraska, Colorado, New 
Mexico,and Arizona for the purpose of investigating the tip-moth injury to 
pines. He has been seeking information which would make it possible to con- 
trol the heavy infestation in the Bessey Nurseries of the Nebraska National 
Fforest at Halsey. The tip-moth (Rhyacionia bushnelli Busck) is doing very ex- 
tensive damage at Halsey, rendering it practically impossible for Western yel- 
low and Norway pines to make any apprecieble growth. The Jack and Scotch pines 
érow more rapidly and have an opportunity to make some headway each year. This 
reforesting project in the sand hills of western Nebraska seems to offer a good 
opportunity to undertake the control by hymenopterous parasites. After visit- 
ing the Nebraska National forest, Mr. Rohwer spent some time in the Colorado 
National Forest and then visited some of the National Forests in New Mexico 
and Arizona. In all of these places there was some evidence of tip-moth injury, 
but it is not nearly as bad as in Nebraska. The injury done in the parts of 
New Mexico and Arizona visited is caused by another species of tip-moth (prob- 
ably Rhyacionia neomexicana Dyar). | 

