38 N. H. EXPERIMENT STATION [Bulletin 319 



Apple Spraying 



A considerable number of mild sulphurs were used in comparison 

 with each other and with lime sulphur as a means of controlling 

 scab. Where these mild sulphurs were of sufficient fineness and pur- 

 ity, they gave nearly as good control as did lime sulphur, and the 

 yield from the trees sprayed with mild sulphurs was larger than that 

 from those sprayed with lime suli)hur solution. Where one or two 

 sprays of lime sulphur were substituted for the mild sulphur, when 

 il appeared there might be excessive damage due to scab, the lime 

 sulphur did reduce the scab infection. The detailed data is given 

 ])v A. F. Yeager in the Xew Hampshire Horticultural societv report 

 for 1939. (Hatch Fund) 



Strawberry Studies 



Howard 17 plants from a Delaware nursery, a Xew Hampshire 

 nursery and the L'niversity of Xew Ham])shire were used to com- 

 pare the effect of i^lant source on the productivity of this variety, re- 

 ports L. P. Latimer. The commercial plants from outside sources 

 both showed "gold leaf" in varying amounts averaging 15 per cent. 

 The Xew Hampshire university plants showed none since particular 

 care had been taken to eliminate this disease by selection in past 

 years. The Delaware ])lants were less vigorous. The yields in 1939 

 showed no significant differences attributable to "gold leaf." 1)ut the 

 smaller production of runners by the Delaware plants did reduce 

 their crop in proportion. 



Borax ap])lication as low as five pounds per acre caused a trace of 

 leaf scorch on strawberries. This was light u]^ to 20 lbs., became 

 markedly heavier at 40 lbs., and at 80 lbs. was quite severe. The 

 yield was not reduced except by the 80 lb. application. The iniur\' 

 was evident as brown spots in the center of the leaves and brown 

 leaf margins, but no bleaching of mid-ribs was evident. 



.\ variety test of strawberries showed their productivity beginning 

 with the highest, to rank in the following order: Cato. Howard 17. 

 Culver. Catskill. Dorsett. and Fairfax, with 7 others ranging down- 

 ward to Jupiter with one-sixth the yield of Cato. (Hatch Fund) 



Apple Drop 



Boron-sprayed trees dropiicd their fruit k-ss than the unspra^ed. 

 reports L. P. Latimer. The a])ples from the treated trees were no 

 larger and ha<l no more seeds than from the untreated but were sig- 

 nificantly better colored. The yield was not increased. Boron did 

 pot increase the firmness of the fruit as indicated by a jiressure test. 

 Cork s])ot was satisfactorily controlled by boron either as a sj^^ay 

 or as a fertili;:er. (Pumcll Fvnd) 



Blueberry Improvement and Propagation 



Cuttings which were diiijicd in .^emesan before planting showc<I 

 little evidence of damping off and it was fouufl that the treated cut- 

 lings rooted much better than those which were untreated, even 

 though the untreated ones did produce some roots. A comparison 



