iOO INJUMOUS INSECTS. 



quickly desert feeding places which show traces of 

 poison or other foreign substances. 



Requisites for Successful Treatment. — Plants 

 of the cabbage character are specially difficult to treat 

 with insecticides because of the crowding together 

 of their leaves and the smoothness of the surfaces. 

 These features of cabbage make it difficult to reach 

 all portions of the plants and to make the insecticide 

 adhere when applied. Any dry powder will adhere 

 only in occasional spots upon the leaves, will gen- 

 erally collect along veins and midrib, which are not 

 usually eaten by the worms, and will be washed off 

 by the first light rain. This characteristic of the 

 cabbage and cauliflower foliage, with the overlap- 

 ping broods of both cabbage worm and cabbage 

 looper and the retiring habit, activity and careful 

 feeding of the latter, make it necessary in working 

 against them to select an insecticide that will "stay 

 where it is put" and that will carry sufficient poison 

 to kill the loopers, even though they eat but a small 

 quantity. The applications must be made so thor- 

 oughly that every spot of surface will be protected 

 and the treatment repeated, at least once, to insure 

 destruction of the newly hatched worms. 



The Best Poison Carrier. — After repeated tests 

 an excellent material for securing uniform distribu- 

 tion and perfect adhesion has been found in a resin- 

 lime mixture. In preparing this mixture it is neces- 

 sary to make a stock solution from the following 

 formula : 



Pulverized resin 5 lbs. 



Concentrated lye I lb. 



Fish oil, or any cheap animal oil except tallow i pt. 



Water » S gals. 



