li)07.] PUBLIC DOCUMENT — No. 33. 203 



invested, and the annual value of the product is over a million 

 dollars. The cranberry plant has a number of serious insect 

 enemies, and fifteen years ago the subject of cranberry insects 

 was given much attention at this station, and the results 

 obtained at that time were published. Farther study on the 

 subject has been greatly needed, but it was impossible to 

 make these anywhere except on the bogs themselves, and 

 until the present year arrangements for this could not be 

 made. Last spring, however, it was found possible to again 

 take up the study of cranberry insects under the local condi- 

 tions found on the bogs, and an investigator spent five months 

 in continuous study of these insects on the bogs around Ware- 

 ham. Many of the problems connected with the control of 

 cranberry pests have been solved, as a result of this investiga- 

 tion ; but many new problems have appeared in the course of 

 the Avork, which make it desirable to continue the study 

 farther, and it is the present intention to have an investigator 

 spend six months at least during the coming year in con- 

 tinuing the observations begun last summer. That the results 

 thus far have been so satisfactory is due in a great measure 

 to the hearty co-operation in the work given by the Cape Cod 

 Cranberry Growers' Association, and of many individuals 

 connected therewith. 



During the latter part of last winter some very remarkable 

 cocoons found in Dorchester were sent to this division by the 

 Gypsy Moth Commission, and were found to be the cocoons 

 of some foreign insect. Subsequently the moths which 

 emerged from them were identified as being native in China 

 and Japan, and concerning which very little appears to be 

 known. The possibility that this insect may become a pest 

 in this country is so great that it has seemed wise to thoroughly 

 investigate its present distribution, abundance, probable means 

 by which it reached this country, and all that is already 

 known of it, and this work has taken much of the time during 

 the last two months of this year. Apparently this insect, 

 which may for convenience be designated the Oriental moth, 

 has been in this country for six or seven years, and it is at 

 least possible that it was introduced on nursery stock imported 

 from Japan. It has now spread over a considerable territory 



