INSECTICIDE FORMULA. 21 



nor is it advisable for them to be allowed in orchards 

 until a few weeks after application. These washes must 

 not be applied to trees having an undercrop of currants, 

 gooseberries, or strawberries later than a month before 

 gathering the fruit. 



London Purple 1 oz. 



Lime loz. 



Water 10 gal. 



Mix as advised for Formula No. 11. 



Uses. — Same as Nos. 10 and 11. 



Time to Apply. — Same as Nos. 10 and 11. 



MISCELLANEOUS INSECTICIDES. 



13. Tobacco Water — Boil 4oz. of shag tobacco in 

 a gallon of water for half an hour; strain off the liquor, 

 and use when cold. 



Uses. — As a remedy for Greenfly on greenhouse and 

 window plants or roses. 



Time to Apply. — When insects infest the foliage. 



14. Quassia and Soft Soap. — The bestdmown of 

 the home-made sprays for garden and greenhouse use : 



Quassia lib. 



Soft soap lib. 



Water lOgal. 



The quassia should be boiled with half the soap and 

 half the water for about one hour, and then the liquid 

 poured off and the boiling continued with the remainder 

 of the soap and water for another hour, the two solutions 

 being added together for spraying. Soft soap by itself, 

 2Ub. to .10 gallons water, is often used. 



Uses. — For ridding plants, roses, etc., of Aphides. 

 Time to Apply. — In summer. 



15. Hellebore Wash. — A cheap and easily-made 

 insecticide for destroying caterpillais on gooseberry and 

 currant bushes. 



