. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 120 Bl i i i . \ \ I I i:\l. Dl IP! RSION i i i 0] m>i i From what has been stated concerning the flight and oviposit! habits of the moths, together with their l"iiLr period of life, il dent thai dispersion l>\ flight is an important factor. Ii oaf shown that the moths of both sexes are possessed of strong flight and that they have been observed making single fligl nearly 300 yards. The duration of adult lifi ac shown in Table -t averages approximately between l 1 and -" days for both sexes, t
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 120 Bl i i i . \ \ I I i:\l. Dl IP! RSION i i i 0] m>i i From what has been stated concerning the flight and oviposit! habits of the moths, together with their l"iiLr period of life, il dent thai dispersion l>\ flight is an important factor. Ii oaf shown that the moths of both sexes are possessed of strong flight and that they have been observed making single fligl nearly 300 yards. The duration of adult lifi ac shown in Table -t averages approximately between l 1 and -" days for both sexes, thai giving tlif moths ample opportunity for wide dispersion in a of flights, even it each flight was of short durat ion. In experiments icsis individual moths of both sexes were recovered at a maximuin distance of 5 miles ii land and 20 miles by water from the point f. Fig. 49. M;i)> of Lake Erie, showing direction of prevailing ports, from Weather Bureau records, during June and July, the wind liberation in the direction of the prevailing wind, indicating that they are able to disperse to at least \\\\> distance and probably for greater distances under favorable conditions. The duration f the oviposition period of the females in New England as shown in Table 24 averages approximately between 1 and 1 I days, and by reference to Table 38 and (lie discussion concerning the daily rate of oviposi- tion it is seen thai the egg clusters are well distributed throughout the oviposition period. This affords an opportunity for the females to deposit eggs at practically any point to which they may disperse. In New England, and to a more limited extent in the eastern and western New York areas of infestation, the dispersion has been great- est in a general northerly direction. It appears that this direction of dispersion may have been influenced by the fact that during the flight period of the moths the prevailing winds are from the southwest. The transportation of infested plant pro
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