258 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



THOSE SPRAYED WITH THE CARBOLIC ACID EMULSION. 



"Washed very clean and easy, requiring no hand brushing, although 

 almost completely covered with smut and mealy bugs, the latter seemingly 

 all dead. No spots from spray." 



The significance of this report can only be appreciated when one knows 

 the real conditions of the fruit referred to. It was taken from a section which 

 was as badly infested with mealy bug as any, and the fruit was thickly 

 coated with black smut and honey-dew. 



It was estimated that the benefits derived from the spray in cleaning 

 the fruit alone, paid for the cost of spraying. The carbolic acid emulsion 

 gave the best results in this work. 



Fruit which was very dirty from smut of black scale was washed in a 

 weak solution of the carbolic acid emulsion in the packing house washer with 

 very good results. The kerosene, which had been used, benefited only the 

 lemons floating on the top of the water, while the emulsion benefited all alike. 

 The mixture was as follows : 



Five gallons of the stock solution was added to 200 gallons in the washer. 

 This amount ran one-half a day — steady washing. Only in cases of very dirty 

 fruit has this given any very great advantages over other washing materials. 



CARBOLIC ACID EMULSION AND BLACK SCALE. 



Many fruit growers here believe that any spray which will kill the 

 mealy bug will certainly slaughter the black scale, but such is not the case. 

 The black scale, even when quite young, is not so susceptible to this spray 

 as is the mealy bug, due to its hard coating. The black scale is protected 

 by its hard shell which is not much damaged by this spray, while the mealy 

 bug is protected by a cottony wax, which is readily dissolved by it. There- 

 fore this spray is not recommended for black scale, although it may kill 

 a great many of the young insects. 



PRACTICAL SUCCESTIONS. 



1. Use ei'cry means to get rid of the citrus meal\ hug at any COST. 



2. Spray as soon as you can. and as often as necessary. 



3. Use fresh and good materia!. It can be had at about the above quoted 

 prices. Write for quotations to any reputable chemical supply house. 



4. Do n>ot think that because you do not kill all the fests at one spraying 

 that the spray is not good. Reincnther that tliis is a -c'cry difficult 

 pest to combat. 



5. Use a power ptiiiip. 



6. Write to this office for any information desired regarding this pest. 



PRESENT STATUS OE MEALY BUO SPRAYING AT SANTA PAULA. 



Since writing the article on spraying for the citrus mealy bug. we 

 have sprayed at vSanta Paula some twenty acres. During this work many 

 of the practical and unpractical phases of the work was brought out, which 

 shall be taken up tnidcr various heads. 



