4i 



anium, Arbutelon and tomato. Results : Plants slightly injured ; 

 practically all of larva? and pupae and about two-thirds of adults 

 killed ; eggs unaffected. Plant lice on calla and red spider on 

 tomato apparently all killed. 



3. Two ounces in 1 gallon of water. Plants treated : Salvia, 

 Arbutelon and tomato (sprayed). Results : Plants uninjured ; prac- 

 tically all of larvae and young pupae, 50 per cent of old, nearly ma- 

 ture pupae, and about 50 per cent of adults killed ; eggs unaffected. 



Bowker's Tree Soap, mnfg. by Bowker Insecticide Co., Boston, 

 Mass. Cost, 6 to 8 cents per lb., according to amount purchased. 



1. One ounce in 1 gallon of water. Plant treated : Tomato. 

 Results : Practically all of larvae and young pupae and at least 90 

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

 adults killed ; eggs unaffected. While the plant was practically un- 

 injured, on a few leaves little areas surrounding the dead larvae and 

 pupae were slightly affected by the application, showing that the 

 limit had been reached at which the solution could be used with 

 safety to the plant. 



Good's Potash Whale Oil Soap, mnfg. by James Good, Philadel- 

 phia, Penn. Cost, 3^ to 5 cents per lb., according to amount pur- 

 chased. 



1. One ounce in a gallon of water. Plant treated : Tomato- 

 Results : Plant uninjured ; practically all larvae and young pupae 

 killed ; old, nearly mature pupae apparently unaffected ; about two- 

 thirds of adults killed ; eggs unaffected. 



2. 1 y\ ounces in 1 gallon of water. Plants treated : Tomato 

 (dipped and left in shade), and a badly infested leaf on another to- 

 mato plant (dipped 10-12 sec. and left in bright sunlight). Results : 

 Plant and single leaf uninjured ; practically all larvae and young 

 pupae and two-thirds of adults killed; about 75 per cent of nearly 

 mature pupae killed ; eggs unaffected. 



Fumigants.* 



Nicoticide, mnfg. by The Tobacco Warehousing and Trading 

 Co., Louisville, Kentucky. Cost, $2.50 per lb. Strength recom- 

 mended, one ounce to 2000 cu. ft. of space. 



* Unless otherwise stated, these experiments were made in a fumigating box contain- 

 ing 15 cu. ft. of space, and estimated to be of about the same tightness in proportion to its 

 size as an ordinary well built greenhouse. 



