not recognizing the trouble, have believed that weak, hard-to-grow plants were 

 the result of varieties "running out." The effect in all varieties is reduced 

 yield, 



ivir. Demaree suggests attacking the problem in two ways in order to 

 eliminate yellows from strawberry stocks. One is for the growers themselves 

 to use only vigorous plants taken from fields knorm to be productive. He 

 recommends plants that are making runners freely and with large green smooth 

 leaves on upright stems. 



The other is for research workers to index the more desirable varieties 

 to find stocks of each that are virus free. This is done by grafting a plant 

 of the variety under test to a virus-free indicator plant of the Liarshall or 

 Marshall- like varieties. Plants proved free of virus must be carefully 

 propagated in an aphid-free area and used to replace present infected stock, 



1/Ir, Demaree believes this indexing can best be done by State experiment 

 station workers. Since each State groivs comparatively few varieties, he says 

 it will be a relatively small task to index those best adapted for that 

 particular State, V.lien enough have been propagated, a portion can be distri- 

 buted to plant growers for mass production under State regulations that 

 assure maintenance of clean stock. 



More about Lime Sulfur , The increase in yield from using 

 elemental sulfur instead of lime sulfur over a 10-year 

 fruiting period in a Maine orchard was 32/o^or over 5 

 bushels per tree. The additional annual cost of the 

 elemental sulfur v/as only about 5 cents per tree, Vilien 

 some of the trees, after the lO-j'-ear period were shifted 

 from elemental sulfur to lime sulfur or vice versa, there 

 was a delay of one year before the change affected bloom 

 or yield. 



Note on Apple Scal d Control . Vhen a single variety was stored in a 

 roomj'consi'stently good scald control was obtained in Mew York State 

 through air purificating with activated cocoanut-shell carbon. Control 

 of scald was obtained with mi::ed variety storage in som.e instances 

 but in 9 out of 16 tests commercial control of scald vms not obtained 

 on Rhode Island Greening apples. Air purificationvri-tii activated 

 cocoanut-shell carbon added, on the average, about 3 weeks to the 

 storage life of apples, "k'.'ith iioLitoJh and Cortland about a month v/t.s 

 added from the standpoint of fruit firmness. 



Using an Oil S pray This Sp ring ? Then you should be sure to get 

 a "superior'' type oil. "(See Note 3 on your 1949 ^ple Spray 

 Chart) 



