542 



NEW JERSEY AGRICULTURAL COLLEGE 



were nearly full grown, but quite a number of small specimens 

 remained, capable of considerable mischief. A number of the 

 caterpillars were brought back to the lalwratorj, and more than 

 half of these developed normally into moths a short time afterward. 

 When the ofhce was notiiied of the occurrence of the insects, 

 ditching and spraying were recommended, and tliis recommenda- 

 tion was followed. Mr. Dickerson found that ditches nearly a foot 

 wide and one and one-half feet deep had been dug around the 



Corn [ntld 



eaten arni t^rat^eci wtf^t ho.ri% oreeri 



German >T,i//et; com/sletel,^ 



deitroueU A 



ued fDu ctrrnu iMOry 



ti 



cJa^a-n mntlUt coynhUfe/u 



Corr>-f,eU^ f,r.f t^o or flree \ 

 rou/s shrauec/ u/i/i haris oreen.* 



.///,/./■ of G^ 



\ let. c/estrouec/ oy armij urorrn. 



naffir coTfi H CO 

 iJfesfed //f fc-r 

 hadlu miurect^ //le /aiier uniyi lured 



= aifche 



Fig. 5. 



Plan of area invaded by Army Worm at Woodbine. Original. 



infested areas to prevent further migration. Tliousands of cater- 

 pillars were already in" them, unable to crawl out, but they were 

 sprinkled, nevertheless, with kerosene to prevent the development 

 of those that were already mature and ready to pupate. The rows 

 of corn to which the larvte had penetrated before the ditches were 

 dug were thoroughly sprayed with kerosene. 



Quite unusually the caterpillars were free from parasitic or dis- 

 ease attack. While in previous invasions which I had observed the 



