24 CROP PEST COMMISSION OF 



Ever since the appearance of the San Jose scale east of the- 

 Rocky Mountains the Experiment Stations and entomologists of 

 nearly every State have continuously and carefully conducted 

 experiments with various remedies for this pest. Fumigation of 

 infested trees under large tents or boxes was early attempted, but 

 this process, though remarkably successful in its effects upon the 

 scale, was not found practical, owing to its comparatively enor- 

 mous expense and the necessity of having a somewhat compli- 

 cated a.nd expensive equipment for the work. 



It is not necessary for us to review the various compounds 

 and sprays, including oils of various kinds, caustic soda, emul- 

 sions of carbolic acid, "patent" preparations, etc., that have 

 been at one time and another tested and advocated as remedies 

 for this scale. 



THE LIME-SULPHUR WASH. 



After tests of many different preparations the one known as 

 the "lime-sulphur-salt" wash, or "lime-sulphur" wash, has been 

 found universally more effective than any other preparation. As 

 this is a preparation that can be made by any fruit-grower or 

 farmer with very little expense for apparatus, and as he has no 

 profits to pay to anyone, except such profits as are made upon the' 

 raw materials (sulphur and lime), it is a remedy all the more de- 

 sirable. As to the exact proportions of lime, sulphur and water 

 necessary to insure the best results, both entomologists and fruit- 

 growers differ considerably. The proportions given below are 

 those which gave the best results, at a minimum of cost, in a long 

 series of experiments made by the Georgia State Board of Ento- 

 mology, in which the writer participated. Although we have 

 not thus far experimented with this remedy in Louisiana, the 

 conditions, so far as the culture of deciduous fruit trees is con- 

 cerned, do not appear to differ materially from those obtaining- 

 in Georgia, and there is no conceivable reason why these prep- 

 arations will not be fully as effective in Louisiana as in Georgia 

 or any other State. 



In preparing the lime-sulphur wash the best quality of stone 

 lime should be used ; lime which contains pebbles or flinty matter- 

 is undesirable. Ordinary ground sulphur, or "flour of sulphur''' 



