92 



yy'"^^ 



Miiryl.'iinl oil tlic cast niid K:iiis;is on I lie wcsl , niid il is coiisccinciil ly 

 )')()ssil>l<' lli.'il it iiiMV !it. sonic lime Uc nolicc'iM y injurious in sonllicrn 

 Illinois. Tlicncc it cxlcnds soul.liv\af(l lo I he ( lull , ami tln'ouj^li Mexico 

 to the noiilicin coasl of South America. 



It injures corn Wy liorin;;- the younj;' stalks (l^'if;. 72), and latei' in 

 the Heuson hy entei-in^ the old stalks and workinj^ down into t,li(! iap- 



I'oot, where it passes tlu! 

 winter. I n t he younj;- plant 

 it tunnels the center of th(! 

 stalk and often hores out,, 

 re- e n Ic r i n <;• el se w h e I'e . 

 ^'ouni;' corn is t hiis distorted 

 and Uadiy stunted. It in- 

 juries older plants hy weak- 

 enin<^ the stalks so that tlicy 

 ar'c easily Mown down. 

 "Most of the corn (ields 

 from Alaliama to Virf^inia 

 suffer to some extent almost 

 e\('r\' \'ear from t he work of 

 this species. In seasons of 

 ahimdance t liei'c is fre(|uent- 

 ly a loss of t wenty-liv(> to 

 lift \ per ceid . of t he ci"op." 

 In IS'. If) a \ irtiinia coi-n- 

 plantei' estimateil his loss 

 from this insect at oxer 

 nine huiidi'<'d dollars, and 

 sexeie injur\' to coimi was 

 Fid. 72. Tlio iwiiKor c.n. S(.illt-l...tcr, ;>/»<nn, N,„- a,t;ain reported in Maryland 



charaliH: «, kcmkmhI iii)p(Miniiic«i of Hliilk iiifdsh-d )>>• (hr • i ^( ,v ,,,.,,,i (i,.|,l< lif.inir 



.vMilv K<M.<M-Mtiun nf Iwrors; /., MMtMc, nil .M..M1 Ic, nI,„w '" ''^•''^' "'''"> '"'''■^ \>(]U<^ 



aXuMu'o,)'''''' '""■'■'"'• '"""""'• "• ^' '"■'"■ "' practi.'ally abandoned be- 

 cause of its woi'k. it was 

 also destriiclixc in (leor<iia in IS<,)!». Althoutd' it apparently prefei'S 

 coi'ii as a food plant, it is nioie \\idel\ known for its injmies to siif^'ar- 

 cane. It has, in fact, recei\-ed its fullest treatment as a su-iar-cane 

 Worerin the British West. Indies. (West Indian I'.ulletin, \ol. I., No. 4.) 

 I(, also infests various spcM'ies and \arieties of sori;huin, includiiifj; cojii- 

 moii sorghum {S. sdcclnirdlinii) . .lolmsoii jj;rass, Indian millet, and 

 f>;uiiH'il-('orn, and a closely related species, ^ama-.a.i'ass (Trii>s(icinii ddch/- 

 loidcff) : 



Winlerint;- as ;i full .t;rown lai'\'a in the tap-root of the plant, the adult 

 insect appears in s|)riii^, and soon after the younj;- coi-n comes U|) it lays 

 its eggs oM the leaves in clusters of four to moie than fifty, usually about 



