39 



injured; practically all of larvae and pupae and two-thirds of adults 

 killed. Eggs unaffected. * 



5. One-half pint in 4 quarts of water. Plants treated : To- 

 mato leaf nearly dead from effect of insects' attack, and another 

 slightly infested healthy leaf, dipped 10-12 sec. Results: Leaves 

 uninjured ; for some reason much more effective than in Expr. 1 ; 95 

 per cent of larvae and pupae killed ; eggs unaffected. 



Laundry Soap (Welcome). Cost 6f to 5! cents per lb, accord- 

 ing to amount purchased. Strength recommended by Britton, 2 

 ounces to 1 gallon of water. 



1. 2 ounces to 1 gallon of water. Plants treated: Salvia, 

 Lantana and Geranium. Results: Plants, as a whole, uninjured (a 

 few leaves slightly) ; about 95 per cent of larvae and young pupae 

 killed, and about 25 per cent of old, nearly mature pupae; about two- 

 thirds of adults killed ; eggs unaffected. 



Stotfs Fir Tree Oil Soap. Cost 30 to 50 cents per lb., accord- 

 ing to amount purchased. Strength recommended : One table- 

 spoonful to a gallon of water. 



. 1. One tablespoonful to a gallon of water. Plants treated : 

 Various greenhouse plants. Results : Plants uninjured ; only a few 

 larvae and- apparently no pupae killed; about one-half of adults killed; 

 eggs unaffected. 



2. One ounce to a gallon of water. Plants treated : Tomato, 

 geranium, Petunia and Salvia. All except a geranium and Petunia 

 plant were syringed about one-half hour later with clear water. Re- 

 sults : Plants not afterward syringed with clear water were slightly 

 injured; about 95 per cent of larvae and young pupae, and about 25 

 per cent of old, nearly mature pupae killed ; a smaller proportion 

 killed on those plants afterward syringed with clear water. About 

 two-thirds of adults killed ; eggs unaffected. 



Kerosene Emulsion. One-half lb. soap, 1 gallon water and 2 

 gallons kerosene. Usually recommended for soft bodied insects : 

 one part of emulsion in 9 of water. 



1. One part in 6 parts of water. Plants treated : Salvia and 

 tomato (sprayed) ; Salvia syringed with clear water about one-half 

 hour later, tomato syringed the following day. Results ; Leaves of 



