410 Report of the Entomologists of the 



the plants have about a dozen leaves, the second being made just 

 before the plants commence to head, even though but few or no 

 worms are to be seen at the time. 



Usually for lettuce only one application of the resin lime mix- 

 ture will be required, at least if combined with hand picking. 

 For lettuce the following proportions must be used: 



Resin mixture 1 gallon. 



"Water (?4 gallons. 



Milk of lime 8 gallons. 



Paris green -J pound. 



This is not recommended as one of the best measures to be used 

 for the protection of lettuce. We still believe that the proper use 

 of mosquito netting would prove the most satisfactory even if a 

 trifle the most expensive. The use of resin lime mixture is sim- 

 ply offered as a substitute that has been tried; a substitute to be 

 used after a house has become infested. 



When the fact is taken into consideration that with one appli- 

 cation of resin lime mixture on cabbage and cauliflower two pests 

 are disposed of, the expense of using it even as a preventive 

 measure is slight. Probably the cost of spraying cannot be 

 reduced much below the estimated amount, viz., about $1 per 

 acre for each application even with added improvements, for the 

 following reasons : First, a knapsack, or a barrel sprayer must 

 be used. No power sprayer will do the work thoroughly on 

 either cabbage or cauliflower. Furthermore, cauliflower heads so 

 unevenly it would not only be impossible but unsafe to spray it 

 with a power sprayer. Second, only intelligent and skillful labor 

 should be employed to do the work. It is essential, for both the 

 cabbage worm and for the looper, to get the mixture on the outer 

 and under surface of the leaves, as well as on the upper surface. 

 Furthermore, the workman must be familiar with the habits of 

 cauliflower, able to tell at glance whether the whorl of leaves 

 at the center is opening so as to expose the flower. Such plants 

 must not be sprayed. t 



