4° 



tomato plant badly spotted by the emulsion, Salvia leaves uninjured ; 

 practically all of larvae and about 95 per cent of pupae killed ; about 

 two-thirds of adults killed ; eggs unaffected. 



2. One part in 3 of water. Plants treated : Arbutilon and 

 tomato (sprayed). The first was afterward syringed with clear water. 

 Results : Tomato leaves badly spotted ; practically all of larvae and 

 pupae and about two-thirds of adults killed ; eggs unaffected. 



3. One part in 9 of water. Plants treated : Salvia and to- 

 mato (sprayed), also a single leaf of Salvia (dipped), afterward 

 washed in clear water one-half hour later. Results : On single leaf 

 every larva and pupa, of which there were hundreds, were killed, 

 and leaf showed no injury, being kept for several days in a tightly 

 stoppered bottle with damp cotton ; on the Salvia and tomato plants 

 practically all of larvae and pupae were killed, but the foliage was 

 slightly spotted ; two-thirds of adults killed ; eggs unaffected. 



4. One part in 1 1 of water. Plants treated : Salvia, Lantana 

 and tomato (sprayed) ; all three syringed with clear water one-half 

 hour later. Results : Plants uninjured except for a few spots where 

 emulsion was not washed off ; practically all larvae and about 75 per 

 cent of pupae killed ; about two-thirds of adults killed ; eggs un- 

 affected. 



Permbl Kerosene Soap, mnfg. by Poole & Bailey, New York 

 City. Cost 14 to 25 cents per lb., according to amount purchased. 



1. One ounce in 1 gallon of water. The soap did not entirely 

 dissolve in a quart of boiling water, and the insoluble scum clogged 

 the nozzle somewhat. In later experiments with this material, this 

 difficulty was obviated by straining through cheese cloth. Plants 

 treated: Geraniums, heliotropes and callas. Results: Plants un- 

 injured ; on heliotrope practically all of larvae and pupae killed, on 

 geraniums results not quite as good, while on callas, where all of the 

 immature insects happened to be in pupal stage, only a very few 

 were killed. This difference in results on the different plants ap- 

 pears to be due to the character of the under surface of the leaves in 

 regard to leaf hairs ; the heliotrope, being best provided with these, 

 retained the liquid the longest and gave the best results ; about two- 

 thirds of the adults killed ; eggs unaffected. 



2. Three ounces in 1 gallon of water. Plants treated : Ger- 



