150 MASS. EXPERIMENT STATION BULLETIN 206. 



Field Meetings. 

 In earl}^ June, 1920, five field meetings were held (in Rochester, Carver, 

 Plymouth, Wareham and Sandwich) with cranberry growers to demon- 

 strate the use of the insect net in discovering and gauging certain insect 

 infestations in their early stages. These meetings were planned as a 

 special effort in the control of the gypsy moth, but the other open-feeding 

 caterpillars often harmful to bogs, such as spanworms and false army 

 worms, were also discussed. A supply of nets had been prepared and 

 sixty were sold to growers. 



Frost Predictions. 

 In both 1919 and 1920 much progress was made in perfecting methods 

 of frost predicting. Most of the results of this study and of the frost in- 

 vestigations of previous years are given in a paper lately pubUshed. ^ 

 In 1920 arrangements were made with the New England Telephone and 

 Telegraph Company for distributing frost predictions to be sent out by 

 the station in the early afternoon and early evening. This service began 

 in the fall. 



Study of Cranberry Varieties. 

 The study of the characteristics of the Cape cranberry varieties was 

 continued, special attention being given to seed counts. Small plantings 

 of the Pride and Wales Henry varieties were made at the station in the 

 spring of 1920. 



Additions to Station Equipment. 



In 1919 a lean-to shed, 41 by 20 feet, with a concrete floor, corrugated 

 iron sides, and board and paper roof, was added to the station building. 

 In one end of this, a part 11^ by 20 feet was made into a garage, the 

 larger room being for box and barrel storage. This addition had long 

 been needed, for when the bog produced a large crop the building was too 

 crowded for storage tests. 



A screening belt and a Ford runabout truck also were added to the 

 station equipment in 1919. The latter, presented by the Cape Cod Cran- 

 berry Growers' Association, was especially helpful, making it possible to 

 visit bogs in distant towns more freely. This extension of the field of opera- 

 tions not only made the station more serviceable to the growers, but also 

 yielded valuable results in the way of new observations. 



Yields in 1919 and 1920. 

 The station bog yielded scantily in 1919 for reasons given below, only 

 about 80 barrels of berries being sold, and this fruit of poor quaUty. On 

 this account, keeping tests were mostly omitted that year. In 1920 the bog 



1 Monthly Weather Review Supplement No. 16: 20-30, 1920. 



