442 THE MONTHLY BULLETIN. 



N 



CALENDAR OF INSECT PESTS AND PLANT 



DISEASES. 



By E. J. VOSLER. 



[Under the above heading the author alms to give brief, popular descriptions and 

 metliods of controlling insect pests and plant diseases as nearly as possible just prior 

 to or at the time when the suggestions given should be carried into effect by the 

 growers.] 



DECIDUOUS FRUIT INSECTS. 



The Brown Apricot Scale. 



The adult brown apricot scale is oval in form, about one fourth of an 

 inch in length and of a reddish brown color. About this time of the 

 year the young scales, which hitherto have been feeding on the leaves, 

 migrate to the twigs and settle there. The scales excrete large quantities 

 of honeydew, the injury resulting therefrom being well known. They 

 also suck out the juices of the trees. The prune and apricot are the 

 principal favorites, but the plum, cherry, peach, pear and grapes are 

 also attacked. 



Spray with caustic soda, distillate or other mechanical mixtures, 

 distillate emulsion or crude oil emulsion, when the trees are dormant. 

 Sometimes it is advisable to spray before all the leaves fall. The 

 formulae* for the different sprays are given below: 



Caustic Soda, Distillate Mixture. 



Water 200 gallons 



Caustic soda, 95 per cent 7 pounds 



Distillate, 28° Baume 10 gallons 



Fill the spray tank with the required amount of water, add the 

 caustic soda, which has been dissolved in a small amount of water, then 

 add the distillate. Keep the agitator going rapidly while applying 

 the spray. 



Crude Oil Emulsion. 



Water ' 175 gallons 



Liquid soap 8 gallons 



Crude oil direct from the wells 25 gallons 



Fill the spray tank with 175 gallons of water, add the liquid soap, 

 agitate thoroughly for one minute, after which add the crude oil. Con- 

 tinue to agitate while the spray is being applied. 



Distillate Emulsion. 



Distillate, 28° Baume 20 gallons 



Whale oil soap 30 pounds 



Water to mix 12 gallons 



Dissolve the whale oil soap in the water, heating it to the boiling point, 

 add the distillate and agitate thoroughly while the solution is heating. 

 For use add 20 gallons of water to each gallon of the above mixture. 



Both the prepared crude oil and distillate oil emulsions can be secured 

 from several of our insecticide dealers. 



The Fall Canker Worm. 



The wingless females of the fall canker worm emerge from the middle 

 of October to about the middle of December, and lay their eggs on the 



♦From Injurious and Beneficial Insects of California, by E. O. Essig. 



