-6- 



That the deliv'--ry of spray material throuj^h a spray nozzle 

 with disc opening 4/64 in, in diameter is xaore thaji doubled as the pressure 

 is incr'sasod from 200 to 800 lbs. Gallons por min. amount to 1,2 ejid 2,6, 

 respectively. At 500 lbs, the delivery is 1,9, v.'hereas a sli£;,htly larger 

 disc opening (6/64 in.) actually delivers at that pressure, twice as much, 

 or 3,8 gals, por min. 



That the amount of russet ing and poor finish on apples is in- 

 fluenced by the spray material :md by the w-,ather, or a combination of 

 both? Exp-vriiiients in llicliigan show that Bordeaux llixture and other copper 

 materials produced fruit v;ith poorer finish than where various forms of 

 sulfur vrere used. Varieties vi-ivc found to vary in th^^ir susceptibility 

 to spray injury, Mcintosh shaving more copper russeting than Delicious. 

 In Massachusetts, Formate has proven better than sulfur on Delicious from 

 a finish standpoint. 



That the worst insect pest of quinces in Ilassachusetts is probably 

 the Oriental fruit moth? DDT in the First Cover and in throe later sprays 

 at 3-vAoek intervals is recommended. Other posts of quinces include quince 

 curculio, codling moth, quince rust, black rot, bitter rot, leaf blight 

 and Brooks' spot. Now that two highly proir.ising materials, DDT and Fermate, 

 are available, quince post control is on a jnuch firmer basis. 



DO STRAV.^ERKI ES RUN OUT ? 



On a recent trip to Cape Cod, Comity Ai^ent Tomlinson called my 

 attention to a more or less general opinion aiiiong the Falmouth growers 

 that strawberries maintained on the saine farm for several yjars are inclined 

 to "run out", showing a gradual decline in plant vigor, plant size, and 

 yield. On the other hand, ho pointed out hca-; vigorous and productive 

 plants appeared to remain vhcn grovm year after year for plant production 

 on the County Farm under a heavy fertilization program. 



Farms v,'';re visited wherei there \":as evidence that County farm- 

 grovm plants produced much more vigorous beds than plants grown by local 

 grov/ors or plants shipped in from south'. rn nurseries. 



The follov.-ing article v\ras Vifritten by R. J. Haskell, Federal 

 Extension Pathologist at i;Vashington, D. C. follov/ing an inspection of 

 the U.3.D.A. strav«'bcrrv trial plots at Boltsvillc, Maryland. It indicates 

 the possibility that obscure virus diseases may bo concerned iu a so-called 

 "running out" of strawberry varieties, 



"V/hy do strawberries 'r\.m out'?" Vihy is it that plants of many 

 eastern varieties from some sources do not do well — are stunted and die? 

 l'*hy does Catskill, for instance, from one source, do so much better than 

 Catskill from some other source? Mr, Domaroo is beginning to find the 

 answer to some of these questions. By grafting eastern varieties from 

 many different sources on to the western variety Marshall, v/hioh shows 

 leaf symptoms of yellows or crimps i/ell, he is able to prove that many of 



