114 GYPSY AND BBOWN-TAIL MOTHS. [Jan. 



egg clusters on the trees and grounds were carefully painted with 

 creosote, but a large number of caterpillars appeared in the spring 

 from off the ground, due, probably, to broken egg clusters acci- 

 dentally scraped from the trees which were cut down during the 

 winter. Tanglefoot was applied to each tree as soon as the new 

 caterpillars were discovered, but not soon enough to prevent 

 thousands from getting into the trees. From May 12 to July 21 

 the trees were sprayed with Disparene, the plant used for the 

 work being a ten horse-power portable steam boiler; a single 

 acting steam pump ; two 300-gallon tanks, in which the Dispareue 

 was mixed in the proportion of 10 pounds to 100 gallons of water; 

 and 1,000 feet of one-inch and three-quarter-inch wrought-iron 

 pipe, to which was connected seven lines of oue-half-inch rubber 

 hose, fitted with double spraying nozzles. At several points 

 windrows of hay sprinkled with gas oil were used, to prevent the 

 caterpillars from entering our property from the surrounding land 

 which had not been protected. 



As a result of these measures, the foliage on the trees on the 

 laud of the Board was injured but very little, and showed a very 

 marked contrast from that on adjoining property. The number 

 of gypsy moth egg clusters to be destroyed on this area during the 

 coming season is comparatively small, and by a prompt applica- 

 tion of Tanglefoot it is expected that but little spraying with 

 Disparene will be required during the coming season. 



The land west of the pond is now badly infested with both 

 gypsy and brown-tail moths, and a force is at present employed 

 in painting the egg clusters with a mixture of equal parts of 

 creosote and gas oil, and cutting off and burning the nests of the 

 brown-tail moths. This work was commenced November 20, and 

 up to January 1 about $1,300 had been expended. 



The total cost of work on the Spot Pond property, exclusive of 

 the work of cutting trees, was $6,300 for the year. Work of a 

 similar character at Mystic Lake pumping station and reservoir 

 has cost about $700, and at Chestnut Hill reservoir $500, making 

 a total of $7,500 expended during the year in protecting trees on 

 the property in charge of the Board. 



Some of the land of the Board in Marlborough, Southborough 

 and Framingham is infested with brown-tail moths, and a few 

 clusters of eggs of the gypsy moth have been found in Westou, 

 Way land and Framingham. 



Yours very truly, 



(Signed) DEXTER BHACKETT, 

 Engineer Sudbury and Distribution Departments. 



