588 



STATE BOARD OF AGRICULTURE. 



kept in nitrogen for eighteen hours almost all were dead. Several 

 were alive at the end of fourteen or fifteen hour periods. 



For a comparative study, Aspidiotu.s ficus on the orange tree was 

 treated as follows: One portion of the tree was treated with lime- 

 sulphur diluted to the strength of a winter spray for San Jose scale. 

 Part of the portion so treated was examined at the end of fourteen hours 

 and the remainder at the end of seven days. Another portion of the tree 

 was treated with white-wash made of slaked lime. A third portion was 

 treated with a wash made of calcium thiosulphate paste. Enough of this 

 paste was used to leave a white coating on the tree. 



Table XI gives the results of all these treatments. 



T.\BLE XI. 

 Aspidiotus {Cyrysomphalus) ficus on orange',: 1. Treated with lime-sulphur, Beaume 21°, diluted with 4h P<"^ of water. 



(Examined 14 hours after treatment.) 



(Examined 7 days after treatment.) 



Dead. 



15 adults. 



30 less than half grown. 



Show Ufe. 



5 adults with no eggs or young. 

 5 less than half grown. 



Alive, sealed in with young under the 

 scales. 



11 adults found 



(140 dead young. 

 104 li\ing joung. 

 33 eggs. 



r 9 limg young. 

 One specimen had \ 22 dead young. 

 4 eggs. 



2. Treated with whitewash. 

 (Examined 10 days after treatment.) 



Dead. 



4 young. 



2 adults scaled off. 



Alive. 



8 adults. 

 15 about half grown. 



Alive with young. 



10 adults 



with {^?LT^^"'''- 



[ 31 eggs. 

 One of the adults 

 had / 8 young alive. 



16 eggs. 



3. Treated with calcium thiosulphate. 

 (Examined 6 days after treatment.) 



8 adults. 

 31 less than half grown. 

 4 other adults were doubtful. 



7 adults. 

 18 half grown. 

 6 less than half grown. 



11 adults. 



33 dead young, 

 with -I 48 living young. 



38 eggs. 



