-4- 



Dr. Hill reports further that both dolomite and magnesium sulfate 

 were applied in 1941 at the rate of 9 pounds per tree to a depth of 18 inches 

 in numerous crowbar holes without controlling the disorder during the season. 

 Also, a 2^5 solution of magnesium sulfate was injected into the soil by a pov;er 

 sprayer, but again no control was evident in the season of application. In 

 England 400 pounds per acre of magnesium sulfate in 3 successive seasons failed 

 to give control. In New Zealand, soil applications of 2 pounds of magnesium 

 carbonate per tree have given best results, although partial control was ob- 

 tained with 7 pounds of magnesium sulfate per tree. There is also some evidence 

 that spraying the foliage with a 1 or 2 percent magnesium sulfate spray early 

 in the season gives temporary benefit. 



V/e hope to have more inforjTiation on this problem following our ov/n 

 experiments. In the meantime, growers might well find out if their own orchards 

 nay be affected by a shortage of magnesium. The symptoms, were outlined in a 

 previous issue of "Fruit Notes," aad mentioned briefly i_n/article above. A 

 further chock can be had by sending loaves to us at the College for "quick 

 tests." See your county agent about it. -l-Lawrence Southwick 



SOIvE STRAY/BERRY OBSERVATIONS 



A recent bulletin from Iowa stresses the relation betv,feen time of 

 runner formation and production capacity of the runner. As compared with 

 runners rooted in July and August, those rooted in September produced only 

 about 2/3 as much, while October rooted runners produced less than l/S as much. 

 To insure plenty of July and August runners, plants must be set early and given 

 good care, September and October runners should usually be treated as v;eed 

 plants. 



The sai.ie bulletin presents one more piece of evidence to show that 

 manure is by far the best fertilizer for strav/berries and that oomiiercial fer- 

 tilizers usually are not worth v/hat they cost on soils of average fertility in 



the northern states. 4 u r. v, 



"•"■•A* * • r roll Oil 



FERIvIATE, A SUBSTITUTE FOR SULFUR 



Back in 1909 apple growers were looking for a substitute for Bordeauj 

 Mixture, The results of many experiments at that time indicated that lime- 

 sulfur solution properly used had advantages over Bordeaux. Lime-sulfur, con- 

 sequently, replaced Bordeaux although injury associated with its use in orchard 

 spraying has alv/ays been recognized in the years which followed. Condemnatior 

 of the lime- sulfur program has been most severe and general in the past 15 yeart 

 and wettable sulfurs have appeared as substitutes. 



Now substitutes for wettable sulfurs are being considered in view of 

 the limitations of sulfur, particularly (1) the incompatibility of sulfur and 

 summer oil on apples, (2) the unsatisfactory control with sulfur of cedar apple 

 rusts, and (3) the russetting of the apples in certain seasons, which in a 

 large measure is due to sulfur. 



I 



