io8 FRUIT TREES AND THEIR ENEMIES 



emulsion with potassium sulphide in the case of the 

 mealy plum aphis. 



Treat gooseberries and currants with weak emulsion 

 or arsenate (see p. 83) for sawfly and magpie moth, 

 using an emulsion containing potassium sulphide if 

 there is any mildew. 



May or June. — Spray cherries and currants with 

 weak emulsion for aphis, and pears with the same for 

 the leaf-blister mite : also apples and pears with 

 Bordeaux mixture (9^ or 9<;), or with an emulsion 

 containing copper sulphate or potassium sulphide, for 

 scab. 



Jicne. — Spray apples towards the middle of the 

 month with weak emulsion for mussel scale and 

 aphis : band the trees to trap the codling moth. 



Spray cherries and pears with arsenate for the 

 sawfly slugworm. 



Spray apples and plums with weak emulsion con- 

 taining potassium sulphide for the mealy aphis, which 

 will also check fungus attacks. 



Trap strawberry beetles and nut weevils, or, in the 

 latter case, spray the bushes with arsenate in the 

 beginning of the month. 



June or July. — Treat apples for woolly aphis as 

 described on p. 63. 



September. — Spray gooseberries and currants with 

 arsenate or weak emulsion for magpie moth. 



October, etc. — Early in the month grease-band apple 

 trees for the winter moth and mottled umber moth. 

 In autumn spray apples with a 6 to 10 per cent, 

 emulsion for aphis, psylla and leaf-hoppers. 



In autumn or early spring spray pears with lime- 



