04 



(losciiptioii, hut tlu* actual (>\|)Oii(litui(> of labor and uioney is practically 

 iusiiiiiiticaiit as (H)iu]>arc(l Avilh tlio loss of crops which nia}- thus be pre- 

 vented. Such a coal-tar bari'ier kejit uj) for a foiiniiiht will conunonly 

 pi'otect a field coni|)letely, and th(> aNcrage cost fo'' tar at three dollars 

 and a cjuarter a barrel (the current pi'ice in southern Illinois) -will be 

 twenty-tive cents a day for a line of a luuidred rods in leniitli. 



If, as a consetiuenc t> of niisniana^iiiMuent or accident, chincli-l)U>is 

 succeed in crossiufi' this barrier or enter the corn before it is made, they 

 will accunuilate upon the nearest rows, where tliey may be k'lled at 

 slight expense by spray iui; or sjirinkliiiii' the ]ilants with a mixture of 

 kerosene and soap-suds known as the kerosene enuilsion. This is made 

 and a})plied as follows: 



Dissolve a half-pound of soa{) (hartl or soft) in a .gallon of water by 

 Iwiliuii;. TU^nove from the stove and add two ga'lons of ct)a!-oil and 

 mix thorouiihly by pumping- this fluid back into itself by means of an 

 ordinai-y spray ])unip. A\"lien the enuilsion is foi-med it will look like 

 buttermilk. To each (piart of this mixture add tifteen quarts of water 

 and sprinkle or s)>ray upon the corn. ]M-eferably before H) o'clock a. m. 

 or after l> o'clock v. m. The l)Uii;s should be washed off so that they will 

 float 'n the emulsion at the base of the plant. A teacupful to a hill is 

 oenerally suflicienl but the quantity must vary with tlie munber of 

 bugs infesting the corn. 



The cost of material per acre of com treated, will be about seventy 

 cents where the plants are ]iractically covered with chinch-bugs, and 

 about thirty cents per acre where it is moderately infested. 



By the use of these various measures corn can be etTectively pro- 

 tected against chinch-bug injury, and if so handled, will become infested 

 only by flying bugs which, having been allowed to mature, are scattering 

 over the country in search of food antl a place of deposit for their eggs. 

 l']ven this 'njury, if serious enough to demantl treatment, may be ai-rested 

 bv the us(^ of the kerosene mixtui-e just described. 



(ilJASSllOPPERS. 



AcKinm.K. 



Injuries to corn by giasshoi)i.ers are rarely suflicient in Illinois to 

 recpiire special attention. These insects tlo not bixvd in corn, but come 



into it, if at all, from grass-lands near 

 by. They first injure the outer rows 

 by eating away the silks and kernels 

 from the tip of the ears and by eating 

 up tiie blades of the leaves, somefmes 

 devouring the husks of the young ear. 

 The efTect of the first inj\u-y is to prevent the f(M-lili/ation of the kernel, 



V\c.. 35. The Red-lessed Grasshop 

 per (Meldiioplus ffmur-rubrum). Nsit- 

 ural size. 



