WEATHER IN CRANBERRY CULTURE 67 



Date of Frost Range of 



Year ■ Minimum Bog Remarks 



Spring Fall Temperatures 



1934 April 28-29 15°-19° F. Estimated injury 8 per cent. 



1935 Little frost injury. 



1936 May 14-15 18°-27° F. Estimated loss 15 per cent. Loss 



on New Jersey bogs 17 per cent. 

 Cultivated blueberry crop of 

 New Jersey' reduced 40 per cent. 



Little frost injury. 



14°-26° F. Estimated loss 1 per cent. 



23°-30° F. Estimated loss 7 per cent. Loss on 

 New Jersey bogs 25 per cent. 



27°-36° F. Loss half of 1 per cent. 

 23°-29° F. Loss half of 1 per cent. 



25°-35° F. Estimated loss 3 per cent. Con- 

 siderable loss on Nantucket and 

 the outer Cape. 



25°-39° F. Little injury. Loss on bogs in New 

 Jersey 10 per cent. 



25°-34° F. 5,000 barrels frozen. 



17°-21° F. Estimated loss 2 per cent. 



22°-28° F. 5,000 barrels frozen. 



18°-25° F. 2,000 barrels frozen. 



20°-28° F. Estimated loss 2 per cent, mostly 

 in Carver, Du.xbury, and Roches- 

 ter. 



This record covers thirty-three years. The estimates of loss in most cases 

 were made from information secured from cranberry growers at the time of oc- 

 currence. Injury to cranberry bogs occurred in the spring as early as April 22 

 and as late as July 4, frosts doing harm 4 nights in April, 19 nights in May, 11 

 nights in June, and 2 nights in July, most of the loss occurring from the middle 

 of May to the twentieth of June. The cranberry vines are usually considerably 

 resistant to frost injury till nearly the middle of May, and frost seldom comes on 

 Cape Cod after June 20. Damaging fall frosts occurred twice late in August, 15 

 times in September, and 4 times in October, most of the injury being done from 

 September 10 to 18. Severe frost rarely comes on the Cape before September 

 10, and by late September the berries are ripe enough to resist frost a good deal. 

 Also much of the crop is gathered by late September and most of what remains 

 on the bogs can usually be protected easily. 



Inspection of the above record shows that loss by frost was much greater in the 

 first half of the period covered than in the last half. The difference is probably 

 due to improvement in flowage facilities and to better attention of the growers 

 to the matter of frost protection. 



