COLORADO POTATO BEETLE 



227 



whenever the beetles are observed to be destructive. The old-time 

 remedy of knocking the beetles into a pan in which there is a little 

 kerosene is practicable for a few hills. In treating potatoes for 

 fungous diseases and potato beetles at the same time, it is recom- 

 mended that arsenate of lead be combined with commercial lime- 

 sulfur diluted in volume to one part lime-sulfur hi eighty parts of 



t*TWi-' 



f.-M,- 



FIG. 236. The Colorado potato beetle, different stages ; also two blister beetles. (Lugger.) 



water, at the rate of two pounds of arsenate of lead to fifty gallons 

 of the lime-sulfur solution. Or use one pound Paris green in 

 twenty-five gallons of the Bordeaux mixture. 



Potato beetles are subject to Tachinid parasites, and one 

 or more bugs feed upon the larvse. The quail and the rose- 

 breasted grosbeak appear to be fond of this unpleasant insect, 



