TNBBCTB INJURIOUS TO AGRICULTURE 



nates principally under the shelter of rani. 

 the more heavily timbered pi of the South, ai 



laying 1 100 to 500 in number) on the ratooi 



when tins i- only an inch or two high. The loca 

 where it hibernates, and where consequently the 

 worms appear, seem to he more common in the western 

 of the cotton bell (Texas) than in the Atlantic cotton 

 Matt-. It is inferred thai from this region tin- moths emi- 

 grate eastand north, laying their eggs later than the original 



mi brood, as in Alabama, I r< orgia, and northward. 

 recently hatched worms of different sizes were found late in 

 March on ratoon cotton in southern Georgia ami Florida, 

 and in late seasons from the middle of April to the middle 

 of May, though they do not attract the attention of planters 

 until the middle or lasl of dune. In midsummer the pcri.nl 

 from hatching to the time when the moth lays hei 



i han three weeks, while in spring ami late autumn twice 

 tiiat tunc may he required. There are thus in the northern 

 cotton States at least three "crops" or br< iter- 



pillara in a n, while in Texas tin 



annual generations. The fn-t generation is only local, but 

 in Texas, Bays Riley, "The third generation of worms may 

 become, under Eavoring conditions, not only widespread hut 

 disastrous, and the moth- produced from them so numerous 

 that the\ acquire the migrating habit. This generation 

 appears in south Texas during the latter part of dune, and 

 in south Alaliama and Georgia somewhat later," and this 

 is the first brood which attracts general attention. When 

 the worms are very abundant and the cotton well "r 

 the moths, driven by need i<( food for their pn 

 with Eavoring winds migrate to distant poi thus 



spread late in summer northward, and they havi 

 as far north as Boston, Buffalo, and Racine, V\ the 



same time these northern specimens arc so they 



are supposed to have been bred on some unkm 11 northern 

 food-plant. This point is not yet settled. 

 The earliest worms are confined tu the . . ds and I 



