318 STATE BOARD OF AGRICULTURE. 



Plot 7: — Scalecide 1 gallon, water 25 gallons. July IStli very few 

 scales found. November 28th many live scales found. Only fairly satis- 

 factory. 



Plot 8 : — Scalecide 1 gallon, water 20 gallons. July 15, very few live 

 scales found. November 28, many live scales found. Only fairly satis- 

 factory. 



Plot 9: — Con-Sol 1 gallon; water 50 gallons. July 15, very few live 

 scales found. November 28, many live scales found. Only fairly satis- 

 factory. 



Plot 10 : — Con-Sol 1 gallon ; water 40 gallons. July 15, very few live 

 scales. Nov. 28, many live scales. Only fairly satisfactory. 



Plot 11: — Kilo-Scale 1 gallon; water 25 gallons. July 15, very few 

 live scales. Nov. 28, many live scale. Fairly satisfactory. 



Plot 12: — Kilo-Scale 1 gallon; water 25 gallons. July 15, very few 

 live scales. Nov. 28, many live scale. Fairly satisfactory. 



On July 15, unsprayed trees were fairly alive with the yellow larvae, 

 and in November had become nearly encrusted. In summing up the re- 

 sults it must be borne in mind that the trees were badly infested and 

 the first conclusion arrived at is, that with the results as noted on 

 July 15, all of the mixtures used are scale destroyers, to a more or less 

 degree, and the results on Nov. 28 simply show to what extent this in- 

 sect will breed and spread during the period from July 15 to November 

 1st, at which time the breeding will probably have stopped in this sec- 

 tion. It should be noted that it was practically impossible to find a 

 live scale upon Plots 1 and 2 upon which lime, sulphur and salt, and 

 lime and sulphur were used respectively, and the number upon most of 

 the other sprayed trees when examined in June was relatively small ; 

 but at the end of the season, such had been their reproduction that many 

 of the trees in Plots 6 to 12 were badly encrusted. From this the im- 

 portance of using the most effectual remedies only can be seen. 



Second: — The lime (25 lbs.) and sulphur (15 lbs.) mixtures, either 

 with or without salt, boiled 35 minutes as in Plots 1 and 2 were the 

 most efficient remedies tried. These mixtures only cost about one cent 

 per gallon and hence were much cheaper than any of the prepared reme- 

 dies which cost $1.00 to |1.25 per gallon, making the diluted mixture 

 cost from two to five cents per gallon. When the time of boiling was 

 cut dov/n, as in Plot 3, and the amount of material reduced, as in Plot 

 4, the results were less satisfactory although they were as good as with 

 the manufactured remedies. 



Third: — Aside from the regular lime and sulpliur mixtures, the lime 

 and kerosene used in Plot 5 was the most efficient and is the most 

 promising of the new mixtures recommended for San Jose scale. Un- 

 less the work was not so thorough, the great difference in results shown 

 between Plots 5 and 6, cannot be accounted for, as Plot G was the only 

 one in which the trees were as badly infested at the end of the season 

 as when sprayed. 



Fourth : — Although the prepared mixtures, Scalecide, Kil-o-Scale and 

 Con-Sol have proven efficient in killing large numbers of the scale, their 

 effectiveness cannot be compared with that of the regular mixtures of 

 lime and sulphur, or lime, sulphur and salt, and as they were more ex- 

 pensive they cannot be recommended in the place of this well-tried rem- 



