32 MASS. EXPERIMENT STATION BULLETIN 449 



Chlorinated camphene, used both as a dust and as a spray, proved to be a fairly 

 effective control for gypsy moth caterpillars. 



Prevalence of Cranberry Insects in the Season of 1947; 



1. Black-headed fireworm clearly more troublesome than usual in both 

 broods. 



2. Gypsy moth caterpillars practically absent on the bogs in the eastern part 

 of Barnstable County, as in 1945 and 1946. As this area was very heavily in- 

 fested with this pest every year for a good many years before 1945, it is believed 

 by some that the egg masses of the insect were killed by the penetrating salty 

 spray driven by the 1944 hurricane. 



The 1947 gypsy moth infestation in Plymouth County and the western part of 

 Barnstable Cou-nty considerable, probably about average. 



3. False armyworm, spotted fireworm (Cacoecia), and firebeetle {Cryptoce- 

 phalus) infestations light or absent. 



4. Cranberry sawfly caterpillars much more generally abundant than usual. 



5. Fruitworm infestations spotty, but about normal on the average; much 

 more troublesome than in 1945 and 1946. 



6. Cranberry' weevil and spittle insect much more abundant than usual on 

 the Outer Cape, causing much concern there. 



7. Red mites {Paratetranychus) more harmful on cranberry bogs than for 

 many years. 



8. Black cutworms on some bogs after removal of grub-control flood, but 

 did less harm than usual. 



9. Honeybees and especially bumblebees abundant on the bogs everj'where, 

 though rather less so than in 1946. 



Weather Studies. (H. J. Franklin and C. E. Cross.) Continuing interest in 

 cranberry weather relations prompted further study, the results of which were 

 prepared for publication as a supplement to Bulletin 433 of this Station. Im- 

 portant new information was obtained, that relating to the effects of the weather 

 on the condition of the fruit having special value. 



Frost Forecasts. (H. J. Franklin.) This special service was continued. Over 

 8000 acres of bog in the hands of 213 subscribers were covered by the telephone 

 warnings, this being nearly four-fifths of the cranberry acreage with fair to full 

 flowage protection. An accessor}- warning service by radio, in cooperation as 

 heretofore with the United States Weather Bureau office at Logan Airport, was 

 handled through Station WEEI at Boston. 



Bibliography of Cranberry Literature. (H. J. Franklin.) From time to time, 

 work has been done on a bibliography of cranberry literature. Cranberry litera- 

 ture has been carefully checked up to 1935, and about 1500 references have been 

 made on 3 x 5 cards. The first reference found was in 1808. References were not 

 numerous until about 1915, but since then there have been 25 or more a year. 

 The literature from 1935 on is now being checked. When brought up to date, the 

 bibliography' will probably have over 2000 references, which it is planned to 

 arrange by subjects. Any information on references to cranberries occurring in 

 scientific journals where cranberry literature is not regularly published would be 

 appreciated. 



