524 Appendix. 



PYRETHRUM. 



This is only used as a fumigaiit for plants under glass, and has not 

 been applied to fruit ; but for peach aphis it might well be tried, as it is 

 very deadly to these insects. 



TOBACCO. 



This is also an excellent fumigant, and is used in connection with 

 fruit under glass. There are various preparations of tobacco for fumiga- 

 ting on the market which may be obtained from nurserymen and dealers. 



