(.KnihlU^ss I'omiHMisaU" tully iov llu^se sin;»ll injuries by I'oivliuii on the 

 ourn lo;it"-aphis<, ol" whii'li tliey :iit^ \ iM'v I\mu1. 



The sole measure oi [uvvenlion surliest eil by thi^se lads riMates lo 

 tlu> so-called meadow maji'ii'otvS. (he tipulid lar\:\' menlioned above. 

 rhesi> instM'ts are i'ound in injurious nmubers cndy in meadow-lands 

 where ihey ha\e hatehiHl front eu'jis laid in lirass or I'lover, and corn 

 ishould not be plantt\l on sod which was badly infestoil by these the \n-o- 

 oedinii; year. 



I.cpidoplcra: Ihittcrlb'ix. Mollis, and (\ifcrpill(irs. C\Herpillai"s ot' 

 about tit"ty-si\ species have been eolleeted or reported from the I'orn 

 plant, feeding on [\\c stalk, tlu^ leaf, and the t\ir. or in some I'ases ilovour- 

 iuii' the ytumii: plant entire. The principal injurious uroups are the eut- 

 wonns. the j2;r:\ss-worms. the army-worm, the web-wt>rms, the stalk- 

 borers, and the S(i-c;\lled coi'ii-worm, which penetrates the husks and 

 mines in the grain beneath. Of tlu^se. the cutworms, the army-worn\, 

 and the eorn-worm are by far the ntost destruetive. .\ few other eater- 

 piila.i's {Hadcna and rrothnia), allieil to the cutworms but having- a 

 ditYoront habit, are mueh loss injurious. 



St>me seventeen speeies oi eutworn\s ha\e been takeit ii\ iMrn. all oi 

 similar habit with rt^spect [o corn, but very considerably ditYerent in 

 lite history- a fact which has an important beariuii' on measures tor 

 their eontri^l. 



The stalk-borers, which penetrate the stalk and burrow within it. are 

 the eomuuMi speeies oi that name {rapnipcina iiitchi). the spindle-wiM'm 

 lAchatodt's :i'a), the' siuithern eorn-stalk-worm ov suiiar-eano borer 

 {Diatfira saccharalifi^. the smaller corn-stalk-borer {Klasmopiilpus //<//»(>- 

 .s'(7/«.s') ■ — also essentially a southern speeies - and a eaterpillar {Ihlo- 

 tropha irnif'orniis) a northern speeies whieh iloes not injure ee>rn in 

 Illinois, but which has Ihhmi known to destroy it in Michigan by burrow- 

 ing along the center oi the \oiu\g stalk. In tai't. only the I'ommou stalk- 

 borer is eomuionly abundant eni>ugii in Illinois to rivse to eeonomie 

 importai\eo. 



The grass-wiMMU {l.aplnmina fniijipcrda) is a post oi i'onwwon oeeur- 

 ix>nce. biu is ordinarily oeonon\ically insiguitieant. Oeeasioually it uuil- 

 tiplies in here and there a place in a way to cause serious mischief, al- 

 though it has biu oiu'O been t"oun(l by us t^in ISSO"! ni>tably destruetive 

 to eorn. 



The army-wt>rm dv>es not breed in corn lields.and is rarely I'ound there 

 except when its numbers fm-eo it to migrate, but thou it i^fteu lays the 

 tield absi^lutoly bare by devmu-ing every plant \o tlie ground. The turf 

 web-wiH-ms ((^nunbii.^) are siuuotinies very destructive Un-ally in Illinois 

 to yoiutg corn after grass, and the garden web-worms {l.o.vosU(jc^ aiv 

 oven moiv injurious in the west-central states. The eorn-worm {Ihlio- 



