CALIFORNIA CITRUS CULTURE. 67 
Commercial Lime-Sulphur. 
The commercial spray is a perfectly clear liquid, easy to handle and 
needing only to be properly diluted for use. It is usually sold in barrel 
lots. There are two common brands upon the market in California, 
sold under the trade names, ‘‘Rex’’ and ‘‘Ortho,’’ though there are 
other sprays equally as good manufactured elsewhere. 
For red spider on citrus trees this spray is applied as a two or three 
per cent solution. 
Carbolic Acid Emulsion. 
SW bial] @O es Oa ee ee ee Se 40 pounds 
@wruade ea bolic sci ts he eee Cee 5 gallons 
Wialtels tonite oe 2S ee 5 te Bee a ee pe ee 40 gallons 
Dissolve the soap in hot-water (the soap must be entirely dissolved) ; 
add the carbolic acid and heat to the boiling point for twenty minutes 
(reserve some water to add in case the mixture begins to boil over). 
For use add twenty gallons of water to every gallon of the above stock 
solution. The emulsion needs little or no agitation. 
This spray is especially recommended for mealy bugs, but is also 
suitable for plant lice and soft brown scale. It is also a good contact 
insecticide for ants. 
Resin Wash. 
Though not a true emulsion and fast losing prominence as a spray, 
this wash is included here because of its value as a spray and dip for 
plants with tender foliage. 
Resin), cesses see Sa a Sees Se ee 10 pounds 
Caustie-soda (76 per cent) 2-222 oa ee eee 3 pounds 
Wish: Oil) 2.222202 sSe eee bese s hoe ee 13 pounds 
Water 2225623 ees sce ce ese eo cass sess sas sececss= 50 gallons 
Put oil, resin and a gallon of water in an iron kettle and heat until 
the resin is softened ; add the lye (dissolved in a small amount of water) 
and stir thoroughly, after which add enough water to make fifty gallons 
of spraying material. 
This wash is only effective for young scale insects, plant lice, or other 
soft-bodied insects. 
Lead Arsenate. 
No. 1. Commercially prepared. 
Lead arsenate (paste) -------------_--------------- 6 to 8 pounds 
Water 2022022. So Be ee See ee ee 100 gallons 
No. 2. 
Arsenate of lead (powder) —~------------------------- 2 to 8 pounds 
Walter 2. 28222 ee ee tee eee eee 100 gallons 
Preparation—Simply dissolve the paste cr powder in the required 
amount of water or in a small amount and add the remainder for use. 
A poison spray for leaf-eating insects. 
