APPENDIX. 191 



persisted in no trace of the living borer can now be found. In 

 treating weevil-infected grains, etc., furniture, furs, hides, etc., 

 attacked by insects of many kinds, the carbon bi-sulphide will be 

 found invaluable. It may be hardly necessary to explain that 

 carbon bi-sulphide, being explosive, should be used away from close 

 proximity to any artificial light, such as candles, lamps, etc., and 

 should be used in an outhouse or in some building detached from 

 the dwelling-house. 



7. OIL OF TAK EMULSION. A valuable material for spraying 

 against leaf-feeding insects, and has been successfully used by 

 Inspectors Farrell and Wallis against the pumpkin beetle, etc. 

 Formula: Crude oil of tar, 1 pint; soft soap, 1 lb.; caustic soda, 

 1 oz.; water, 10 gallons. Boil one pint of water, and in it dissolve 

 the soap and soda; add the oil of tar and agitate well with a garden 

 syringe till thoroughly emulsified. Then add the remainder of the 

 water (hot), mix well, and use as hot as possible. 



8. SULPHIDE OF LIME. Inspector Davey reports having used 

 this material very successfully against red spider and acarids (mites) 

 generally. Formula : Boil together 1 lb. flour of sulphur and 1 lb. 

 of lump lime in 2 gallons of water until dissolved; then add 18 

 gallons of water. This material should be useful against thrips and 

 insects of this class. 



9. MURIATE OR CHLORIDE OF POTASH. This material has 

 been proved by us to be, so far, the most effective agent in destroying 

 peach aphis of both kinds at the roots. Trees badly affected with 

 green aphis for some years have been completely cleaned by placing 

 from 1 to li Ibs. around the stem of the tree early in June. The 

 potash should be dug into the soil, a few inches below the surface. 



10. GYPSUM. This material being cheap has been used very 

 successfully against pasture grubs and similar underground pests. 

 Use at the rate of from 5 to 6 cwt. per acre. We have had good 

 results from the use of the so-called colonial gypsum. Inspector 

 Pescott is of the opinion that gypsum has proved only fairly 

 successful in heavy clay soils, where, by chemical action, it has 

 released the potash in the soil. Gypsum has been used successfully 

 by Inspector Meeking against the dark-green pasture grub. 



There are many other materials on the market which are highly 

 recommended as being of value in spraying; but many of them 

 have not the merit of cheapness combined with effectiveness two 

 conditions which must be insisted upon if spraying is to be as 

 popular and remunerative as it deserves to be. 



NOTE, On pages 29 and 37, read the word "Order" before " Dipt era" at head of chapters. 



