182 



VEGETABLE INSECTS 



all the hibernating places of the flies and puparia. If it is 

 feasible, the field should be plowed in the fall or early winter, 

 in order to destroy as many of the over-wintering forms as 

 is possible. 



A Member: Last year on part of my field, when setting 

 my plants, I left a little depression near each plant. Then 

 I took some air slaked lime and wet it with water to the con- 

 sistency of cream, then added coal tar to scent it. That 

 formed a little cake. I thought I did the work much more 

 quickly than when I have used the papers. 



Question: Where do you get these papers? 



Professor Herrick: They used to be manufactured by 

 a company in New York City, but my letters have been re- 

 turned to me from there the last few years. It was W. H. 

 Gassert of New York City. The pads could be bought for 

 a fourth of a cent apiece. 



A Member: The Joseph Harris Company of Coldwater, 

 New York, carries them at a dollar and a half a thousand. 



Professor Herrick : You can make them at home. You 

 need a band of iron forming half of a hexagonal outline, 

 with a little die in the middle for cutting the slits in the 

 middle of the card. The tarred paper is run on a roll. (Such 

 a tool was exhibited). 



Question: What is the object of cutting them hexagon 

 shape? How about square? 



Professor Herrick : I think they could not be put around 

 the plant so easily. 



Question: H/ow about round? 



Professor Herrick: If you use a round one, you will 

 waste a lot of paper. This seems to be the most economical 

 machine for cutting the paper and wastes the least of it, 

 while the pads seem to fit around the cabbage plants and con- 

 form to the surface of the soil. 



Question: Does this insect come from the top and start 

 down towards the bottom? 



