EXPERIMENT STATION REPORT. 599 



dirty white appearance with a sHght orange tinge. A very shght 

 burning was noted on some fohage July 5th, 



The report on July i6th was good on the whole, indicating a 

 wholesale killing of scale, with a decided remnant of black sets 

 of the first brood. A very slight scalding of the foliage was 

 noted ; but not enough to be regarded as an injury to the trees. 

 July 31st matters were not much worse, although an abundance 

 of nearly mature sets was noted. These began reproducing in 

 early August and, on the 13th of that month, the trees were in 

 worse condition than any others in the orchard. It was there- 

 fore decided to respray the group, which was done on August 

 i6th with the ''Con. Sol.", i part, to water 40 parts. 



This closed the series in which Sulphite of soda was used as a 

 base; that material having failed to produce any good results in 

 any used combination. 



Experiment 12 — The "Dreer Mixtures" were both used July 

 2nd at the rate of i part in 25 parts of water. No. i mixture 

 dissolved easily, but had some sediment which it was necessary 

 to strain out before using. Sprayed trees 28 and 29, which, when 

 dried, had a slightly bluish appearance. Examined July 5th, 

 there w^re no moving larvje on either tree ; but beyond that no 

 effect could be noticed on the scales. The foliage seemed unin- 

 jured. July 1 6th, there were not so many recent sets, but plenty 

 of the older forms. The leaves Had turned a reddish brown color 

 and many had dropped off. July 30th, quite a marked difference 

 was recorded as between the trees ; on No. 28 there were only a 

 few scales in any stage ; on No. 29 there were a great many in all 

 stages. On both, the foliage was very ragged. The same differ- 

 ence in scale conditions was noted August 13th, but afterward 

 both rapidly became worse and were sprayed, September 7th, 

 with the "Con. Sol.", i part, to water 40 parts. 



Mixture No. 2, dissolved w-ith difficulty and, indeed, was left 

 in soak for 12 hours before it was deemed fit to use. There was 

 some coarser sediment W'hich it w^as necessary to strain out before 

 using. One tree only, No. 27 was sprayed and this could not he 

 distinguished when dry from those treated with the first mixture. 

 July 5th, there had been no apparent effects on the scales, nor had 

 the foliage been injured. July i.6thiheTe were plenty of living 

 scales of all stages and the foliage had become mottled, discolored 

 and' lifeless. July 30th, the recent infestation was very obvious 

 and the earlier sets were, in general, nearly ready to reproduce. 

 August i6th, matters were still worse and on September 7th, 

 sprayed with the "Con. Sol.", i part, to water 40 parts, closing 

 the experiment. 



