glycerine, or formalin. Some of the 



holes were plugged with wood, and 



the others were left open. The holes 



which were treated with alcohol 



showed less staining than the others, clusively identified 



Plugged holes showed more staining C. L. Stevens 



than unplugged holes. The staining 

 is apparently caused by a fungus. 

 Numerous cultures of wood were 

 made but the organism was not con- 



Fruits 



An Outstanding New Strawberry 

 Variety is Named Great Bay. For 

 a number of years a strawberry seed- 

 ling resulting from a cross between 

 Simcoe and Catskill has been out- 

 standing in certain qualities. It had 

 been designated as number 62. 

 Again, in 1947, it was the outstand- 

 ing variety among 109 selections 

 from 1,350 seedlings of crosses made 

 in 1946. It has now been released 

 to the trade under the name of Great 

 Bay. 



The plants are vigorous, and 

 drought-resistant, and produce large 

 crowns and root systems. Individ- 

 ual plants may produce 10 or more 

 trusses of fruit held well above the 

 ground. Runner production is mod- 

 erate so that plants become well 

 spaced in the row. 



Great Bay berries are medium to 

 large in size, and of medium flavor, 

 being less tart than Howard 17. In 

 season they are three to four days 

 later than Howard 17, and produce 

 berries of good size to the end of the 

 fruiting period. 



Great Bay is recommended for the 

 home garden and the local market. 

 L. P. Latimer 



Hay Mulch Reduces Magnesium 

 Leaf Scorch on Apple Trees. A leaf 

 scorch of apple tree leaves caused 

 by magnesium deficiency is preva- 

 lent in numerous orchards in New 

 Hampshire. Because it also exists 

 in the University orchard, methods 

 of control have been conveniently 

 studied. Six years ago a block of 



trees which showed considerable leaf 

 scorch were tested in various ways. 

 Although it has been shown that the 

 scorch can be prevented by spraying 

 the leaves with a solution containing 

 magnesium, the most practical meth- 

 od resulting from these studies ap- 

 pears to be that of applying a hay 

 mulch. When the experiment started, 

 the trees that were designated to re- 

 ceive a hay mulch had about 20 per 

 cent of their leaves affected with leaf 

 scorch and the trees in the unmulch- 

 ed sod plots had about the same 

 amount of scorch. During the past 

 season, the trees in the sod plots had 

 23 per cent of their leaves affected 

 by leaf scorch while only 2.5 per 

 cent of the leaves on the hay-mulched 

 trees were scorched. It should be 

 stressed, however, that the effect of 

 the hay mulch is not immediate; it 

 may require four to six years to re- 

 duce the severity of the leaf scorch. 



Greenhouse studies have indicated 

 that organic salts of magnesium, 

 such as magnesium acetate and mag- 

 nesium ammonium phosphate, are 

 better sources of magnesium than is 

 magnesium sulfate. This conclusion 

 is based on the better growth that 

 resulted from the organic salts when 

 supplied to apple trees grown in sand 

 and water cultures. More detailed 

 studies are necessary to determine 

 the causal factors involved. 



Non-scorched leaves of Mcintosh 

 apple trees had a higher magnesium 

 content throughout the season than 

 did apparently normal leaves from 

 trees known to be susceptible to leaf 



17 



