. Annual report. ad been reported at Aniherst, and wasknown to occur at Fitchbun>- and Worcester. It extended cr south to Cape Cod and north throughout southern New Hamp-shire and along the Maine coast to Eastport, thus having amuch wider distribution than the gypsy moth. Since thefunds available were wholly insufficient to cope with bothpests, it was decided to adopt the policy of suppressing thegypsy moth so far as possible wherever it occurred, and toconfine work against the brown-tail moth to clearing streettrees and trees around or near residences. The followingreasons governed the dec
. Annual report. ad been reported at Aniherst, and wasknown to occur at Fitchbun>- and Worcester. It extended cr south to Cape Cod and north throughout southern New Hamp-shire and along the Maine coast to Eastport, thus having amuch wider distribution than the gypsy moth. Since thefunds available were wholly insufficient to cope with bothpests, it was decided to adopt the policy of suppressing thegypsy moth so far as possible wherever it occurred, and toconfine work against the brown-tail moth to clearing streettrees and trees around or near residences. The followingreasons governed the decision : — 1. The gypsy moth spreads slowly, almost entirely by theagencies of traffic. The female moth does not fly. The brown-tail moth is a strong flyer and is borne by thewind for many miles. 2. The gypsy moth is a serious pest of all trees, bothdeciduous and coniferous, and attacks all shrubs and some-times even crops. The brown-tail moth attacks deciduous trees, and is mainlya pest of fruit trees and 1906.] PUBLIC DOCUMENT—No. 73. 29 3. The gypsy moth is often hard to find, even when abun-dant, and its treatment calls for a high degree of skill as wellas a liberal outlay of money. The brown-tail moth is easily found in winter when itswebs are prominent at the tips of twigs. Its destruction isrelatively inexpensive and calls for no particular skill. 4. But few gypsy moths are likely to reach Massachusettsfrom the small colonies outside the State. A strong northerly wind during the flying season wouldblow into Massachusetts multitudes of brown-tail moths fromthe now badly infested New Hampshire border and fromsouthwestern Maine. The facts being as above stated, it seemed to the superin-tendent unwise to authorize large expenditures of money incombating the brown-tail moth in woodlands, while in thecase of the slow-spreading and more dangerous gypsy mothit was obvious that every possible effort should be made tostamp it out wherever it occurred. It was therefore de
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