6? 



In a greenhouse, so far, we can recommend no 

 better plan than painting the pipes with flowers of 

 sulphur mixed up into a paint. The heat, however, must 

 not be great, or the fumes may come off too strong and 

 do damage. A small amount of heat and the treatment 

 carried on for three or four times will soon clean a house 

 of this pest, but we must remember the fumes will not 

 harm the eggs, and thus we must repeat it to kill those 

 that hatch out some days (4 8) later. 



WASHES USED FOR ROSE TREES. 



Amongst the various methods of coping with insect 

 attacks, the spraying or washing of the plants with some 

 insecticide or fungicide has year by year become more 

 popular. When we have to deal with a delicate plant 

 like the Rose we must proceed with great caution, as any 

 caustic substance is very likely to do more harm than the 

 pests themselves. 



For this reason we wish to discourage the use, in 

 any form, of paraffin as an insecticide, and it is only 

 advised as such in very exceptional circumstances. 



The washes of greatest benefit for Rose pests are 

 (i) Soft soap and quassia ; (2) Tobacco wash ; (3) Helle- 

 bore wash ; (4) Arsenate of lead ; and (5) Liver of 

 sulphur. 



(i) Soft-soap and Quassia Wash. This is by far 

 the best for Aphis or Green Fly, and young Scale Insects. 



The quantities to use for Roses are as follows : 



Soft soap \ r-lb. 



Quassia i-lb. 



Water 10 gallons. 



