. Cranberries; : the national cranberry magazine. Cranberries. "1- 1 :. • • .j. v„^ .xesearc. Professor, Cranberry Station East Wareham, Mass. Insecticides, fungicides, herbicides, and the equipment used to apply them, were summarized in the last issue of Cranberries under the above title. The frost, harvesting, labor and marketing phases of cranberry production will be presented in this issue. Frost Frost was mentioned in some of I the surveys but not in all of them. The Massachusetts surveys give the minimum temperature and the percentage of damage from the I frost. However
. Cranberries; : the national cranberry magazine. Cranberries. "1- 1 :. • • .j. v„^ .xesearc. Professor, Cranberry Station East Wareham, Mass. Insecticides, fungicides, herbicides, and the equipment used to apply them, were summarized in the last issue of Cranberries under the above title. The frost, harvesting, labor and marketing phases of cranberry production will be presented in this issue. Frost Frost was mentioned in some of I the surveys but not in all of them. The Massachusetts surveys give the minimum temperature and the percentage of damage from the I frost. However, when the early i rei>orts are studied, it becomes evi- ident that Dr. Franklin studied frost from the first at the State Bog. These reports stated or- i chard heaters were not satisfac- tory and were dangerous, the skin- ner type of irrigation was expen- sive and the nozzles plugged easily, and tobacco cloth raised the temperature at the vines 4^° F. at a cost of $200 per acre. The formulae used to figure the mini- mum temperature were published in 1920 and the fall of that year the telephone frost warning sys- tem was started. The new Jersey survey did not mention frost, but up until re- cently they used one of Dr. Franklin's formulas and a tele- phone system to warn the cran- berry growers of the expected minimum temperature. In Wisconsin, the frost problem is greater than any other problem and is probably greater than that of any other growing section. In Massachusetts and New Jersey, there are a few dry bogs, but it would be impossible to get a crop on a dry bog in Wsconsin. Cox, of the Chicago Weather Bureau, made studies of frost in Wiscon- sin and found that sanded marshes had higher minimum temperatures than marshes which were not sanded. In forecasting for Wiscon- sin, some of their formulas were used and some of Dr. Franklin's. The Stevens Point Radio Station WLBL broadcast the warnings as early as 1928, and possibly earlier In the 40's, the cranberry grow
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