CAPE COD CRANBERRY INSECTS 



By Henry J. Franklin 

 Research Professor in Charge of the Cranberry Station at East Wareham. 



Two general bulletins on cranberrj' insects have l)een pulilislied by the 

 United States Department of Agriculture.' Both were based on work done 

 mainly in New Jersey. Cranberry insect problems in Massachusetts vary 

 widely from those in New Jersey, for several of our important pests are 

 nearly or quite unknown in that state and differences in metliods of culture 

 and in climate affect the situation greatly in many ways. 



Tiie possil)le value of a paper of tliis kind nuiy be judged if it is recalled 

 that there are about 14,000 acres under cranlierry cultivation in Massachu- 

 setts," tliat tills fruit is tlie leading export crop of the State, witii a gross 

 annual value of from $2,600,000 to nearly .$.5,000,000,'' and that insects have 

 destroyed on an average fully a fifth of the crop yearly. 



It is hoped that this treatise will meet a need that long lias been voiced, 

 and it is with the apologies of tlie Commonwealth that the first paper cover- 

 ing this important feature of cranberry culture is presented only after a lapse 

 of nearly tliree-quarters of a century since the industry began in this, the 

 state of its origin. 



Every effort has been made to arrange this pajier so clearly and simjily 

 that cranberry growers may fhid it not only informing Init thoroughly usable. 

 It is amply illustrated, and the color plates and tables for the identification 

 of the various species should be particularly helpful. It is divided into six 

 parts, as follows: 



Part I. — Worms or zcormlike forms <tffiirki)i(i the foliaije. hiuls, 



flowers or fruit. 

 Part II. — Forms not wormlike attackinij the folinf/e or fruit. 

 Part III. — Insects attacking the stem. 

 Part. IV. — Insects attacking the roots. 

 These four parts briefly describe the various pests, their life liistories, and 

 the injuries they do, and give the controls found most effective. 



Part F. — Insects and other animals henefiria! to rranherr;/ 

 growing. 

 Cranberry flower pollination is treated here, and the predatory enemies and 

 insect parasites of cranberry pests are discussed. 



Part F7. — Insecticides and paraphernalia used in fighting cran- 

 berry pests. 

 Spraying ap])aratu.s, the insect net, and insecticides are discussed here. 

 This bulletin presents Part I, the other five parts being held for another 

 bulletin. 



1. U. S. Dept. Agr. Farmers' Bui. 178, by T. B. Smith (1903): and 

 U. S. Dept. Agr. Farmers' Bui. 860, by H. B. Scammell (1917). 



2. Mainlv in Plymouth. Barnstable and Bristol counties, but also in five others. 



.3. This averaging for the last six years as great as tnat of the State's potato crop and con- 

 siderably over half as great as that of the commercial apple crop of all New England. 



