42 MASS. EXPERINfENT STATION BULLETIN 378 



THE CRANBERRY STATION 



East Wareham, Massachusetts 



H. J. Franklin in Charge 



Injurious and Beneficial Insects Affecting the Cranberry. (H. J. Frank- 

 lin.) 



Hill Flrczvorm (Tlascala finitella [Walker)). In the last annual report of 

 the cranberry station/ some pupae of this species were mentioned as 

 remaining on November 27, 1939. These pupae lived through the winter 

 and spring and their moths emerged June 9 to 15. These moths were all 

 somewhat larger than those that had come out in late August and early 

 September, their wing expanse being about fifteen-sixteenths of an inch and 

 their length to their wing tips about seven-sixteenths of an inch. 



A severe infestation by this insect occurred this season on a bog at 

 Onset, Mass., over an acre replanted in May 1940 being badly damaged. 



Cranberry Weevil (Anthonomns musculus) . The following treatments were 

 tried on this pest: 



1. Six pounds of tartar emetic and 24 pounds of brown sugar in 100 

 gallons of water, 400 gallons to an acre, applied on June 8, 1940, reduced 

 the count in a week from 52 to 20 weevils to 50 sweeps of the net, and 

 only a very light infestation of the new brood was found on the treated 

 area on August 6. 



2. Basic copper arsenate, a new product of the Sherwin-Williams Co., 

 applied on August 6 at the rate of 6 pounds in 100 gallons of water, 400 

 gallons to an acre, killed 94 percent of the weevils of an infestation of 134 

 to 50 sweeps of the net. 



3. A broadcast of 200 pounds to an acre of Go West weevil bait on 

 June 6 reduced an infestation of 210 weevils to 50 sweeps of the net 68 

 percent in 8 days. 



4. Barium fluosilicate, applied on August 6 at the rate of 6 pounds in 

 100 gallons of water, 400 gallons to an acre, killed 90 percent of the weevils 

 of an infestation of 86 to 50 sweeps of the net. 



5. Cryolite used as a spray, 6 pounds in 100 gallons of water, 400 

 gallons to an acre, or as a dust, 30 pounds to an acre, was very effective 

 in many cases but only moderately so in others. This variation in re- 

 sults may have been due to different timing of the treatments relative to 

 the main feeding periods of the weevils. 



In the experience with this insect so far, the Bordeaux mixture-calcium 

 arsenate-soap spray, basic copper arsenate spray, cryolite spray and dust, 

 and very high grade (Kenia) pyrethrum dust have been the more effec- 

 tive insecticide treatments. 



Cranberry Aphid (Mysus scammeUi Mason). This species, lately described 

 as new,^ has been under the writer's observation for thirty years. It is 

 found only on bogs which are not reflowcd during the growing season. It 

 is sometimes quite abundant and would be an important pest were it not 

 well checked by its natural enemies, the larvae and adults of the follow- 

 ing lady beetles, named in the order of their importance in this, being very 

 effective"; Coccinclla transTersoguttata F., Coccinella g-notata Herbst., Hip- 

 podamia parenthesis Say, Coccinella II- punctata L. 



'Mass. AgT. Expt. Sta. Bui. 369:34. 1940. 



=Ma8on, Preston W. A revision of the North American aphids of the genus Myzug. 

 U. S. Dept. AgT. Misc. Pub. 371, pp. 2, 5, 18. 1940. 



