230 



CORN 



beetle." The mating then begins and eggs are laid in June, completing 

 the life cycle. 



The fact that the life history extends over almost three seasons 

 makes its eradication that much more difificult. Sod is sometimes 

 very seriously injured by these grubs. When the number of plants 

 per acre is materially reduced, as when corn is planted on sod ground, 

 the damage of the grubs is noticed to a greater extent. One grub 

 attacking each hill of corn will show damage where the same number 

 of grubs per acre on sod could not be noticed. Where the corn is 

 killed outright, or has a dwarfed appearance, having a yellowish tinge 

 throughout, the indications point toward the presence of the grub. 

 When grubs are present the roots of the corn plant will be found to 

 be very short and stubby. The plant may be slightly bent, due to the 

 fact that the disabled roots are unable to hold stalk in an upright posi- 

 tion. If indications point to the presence 

 ::s^^^ of the grubs and they are not readily 

 fdund, they may be discovered by digging 

 tlown a foot or two from the plant. Corn 

 of different sizes is often attacked by the 

 grub. There are several other species of 

 Lachuostcriia besides the genera cyclocc- 

 phala, which do damage to the corn plant. 



> 



The common Sod Web-Worm. 



Adult. Slightly enlarged. 



f ij'amhus irisecttis) 



Prevention and Remedy. Fall plowing is a very desirable and 

 effective means of destroying many pupae and lar\'ae. Sod that is 

 fiadly infested, having been plowed in the fall, may be almost freed 

 from grubs by turning in hogs. The first crop of corn should be kept 

 as free from weeds as possil)le in rirder to prevent the adults from 

 depositing eggs for a future brood. Clo\'er is seldom injured by the 

 white grub; neither is the grass growing in the clover field. Pota- 

 toes, strawberries and lieets are often attacked; also young larches, 

 evergreens and tender rooted shrubs and fruit and forest trees. One 

 or two seasons of clover will eliminate the grub sufficiently to allow 

 the planting of corn in comparati^-e safety. 



CORN BILL BUG (Several species of the genus SpIiciioplionisJ 

 Unlike the other pests of corn, the bill-bug represents the adult stage. 

 That is, his activities are disastrous during the imago rather than 

 larval stage. The damage done is measured bv the number and size 

 of beetles. Corn on snd land is most frequently affected. 



Tlic corn bill-bugs A-ary ui size and color, but most of them are a 

 dull black. Their surfaces arc pitted. They are snout beetles, having 



