91 



and has been observed active in Illinois July 13 and 14. Adults of 

 tliis brood liavo been taken by us abundantly in late July and in August. 

 Larvui found August 11 in Kansas probably represented the third brood 

 of the season. Larva; of this brood, taken l>y us on soy-beans August 

 27, harj nearly all pufrnted by September 4, and gave adults Septem- 

 ber 10-1 ;j. (Jn September 2, full-grown larva; and moths were very 

 common, also some very young larva;, the latter probably represent- 

 ing tlu; fourth generation. 



"J Jeep plowing or thorough harrowing in the fall after the larva; 

 have ent(;red the cocoons in the; earth will destroy large numbers of them. 

 When the; worms appear in d(;structive numbers upon the foliage, thf;y 

 may be controlled by a spray of Paris green or other arsenite, using 

 one i)ound to 125 gallons of water, providing, of course, that the tops 

 are not to be fed to stock. An under-spray nozzle should be used, so as 

 to reach all parts of tht; plafit in an effective manner. Wh(;n present in 

 larg(; mmibers and doing serious injury, the worms can be more quickly 

 killed by sjn-aying with strong kerosene emulsion, but this will only kill 



those hit, and an arsenite should also ]>(' applied without delay." 



Sand(;rson. 



Since th(;y breed especially (jn the j>igweed or "careless weeds" 

 (Amarantun), the destnu-tirm rtf these weeds will usually pr(;vent serious 

 injury. 



Till-: bAR(;i:R corn stalk vaaier. 



Dmtrwa saccharalis F'abr. 



This is a large dirty-white caterjjillar (l'"ig. 71;, from thn-e fourths of an 

 inch to one inch in length, with transverse rows of large brown or black shin- 

 ing sp(jts on each seg- 



ment. It becomes 

 almost [)ure white 

 aftef the last molt 

 and as s(;en during 

 the winter. I'Ik; 

 head and neck- 

 -liicld vary from 

 hon(;y-yel low to 

 black. 



This is essentially 

 a Southern species, 

 and is unknown as 

 a corn insect in Illi- 

 nois. I'he northern 

 limit of its range is, 

 however, fixed at 



■^ 



e 



■-0^' 





'y'~ - y^ j-^--^^^ 



fcyy^v^-Vvtt-u^ 



The 



Larger (>)rri Stalk-borer, IHiilrma saccharalin: 

 a, 0, c, varietieH of larva, enlarged aH imiicateil; d, .3d thoracic ntK- 

 merit; e, 8th abflomiiial; /, i/, a niidille «eKmerit, side and top viewH, 

 (Howard, U. S. Dept. gf Agriculture.) 



