THIRD ANNUAL REPORT OF STATE ENTOMOLOGIST. 223 



extent. Their presence may be detected by places eaten nito the 

 leaves and it is even desirable to open the ears of corn sufficiently 

 to remove the caterpillars where they may be detected. from exterior 

 signs. 



Excellent results have been obtained v^^here the insect occurs 

 abundantly by attracting the moths when they are just from the 

 pupae and before they deposit their eggs, to a mixture of molosses 

 and vinegar. The odor attracts them for a considerable distance 

 and alighting upon the sweet mixture, become entangled and are 

 drowned. The vinegar and molasses are mixed in a proportion of 

 four parts of the former to one of the latter. This may be placed 

 in a corn field in tin plates on flat ended stakes. This melhod has 

 been employed in controlling the pests on cotton. 



Similarly the moths have been attracted to lamps so arranged 

 that in flying against them they fall to a reservoir below the lamp 

 in which is placed a mixture of kerosene and water. One of the 

 simplest forms is that in which a torch is used, the oil reservoir 

 being soldered to the center of a broad tin dish, containing water 

 with a small quantity of kerosine floating on top. The whole ar- 

 rangement is fastened to a stake driven into the ground. 



We should emphasize the importance of the destruction of the 

 first brood in order that the second brood, which has been shown 

 to be more injurious, may be greatly reduced in numbers. 



It seems probable that flooding the garden with water about the 

 first of September or a little later but before the ground freezes, 

 would result in the destruction of many of the pupae in the ground. 

 Late disking of the field after the pupae have been formed in the 

 soil about the first of September will probably have the result of 

 exposing many of them to the attack of insects and to destruction by 

 severe weather. 



