Fumigation investigations in California . C. , ofSoutli Africa, andW. J. Allen, ofNew South careful studyhas been made ofthe dosage sched-ules proposed bythese different in-vestigators with a result most surprising. In the first place, wemust consider that uniform dosage will not be given to treesunless based directly on their cubic contents when covered witha tent. Secondly, dosage taides prepared for trees merely withregard to their cubic contents and without regard to the varying pro-portions of leakage surface present in trees of different sizes arefaulty to a large degr
Fumigation investigations in California . C. , ofSoutli Africa, andW. J. Allen, ofNew South careful studyhas been made ofthe dosage sched-ules proposed bythese different in-vestigators with a result most surprising. In the first place, wemust consider that uniform dosage will not be given to treesunless based directly on their cubic contents when covered witha tent. Secondly, dosage taides prepared for trees merely withregard to their cubic contents and without regard to the varying pro-portions of leakage surface present in trees of different sizes arefaulty to a large degree. Of all the dosage tables which have cometo the writers attention only those by Lounsbury, in South Africa,by Morrill, in Florida, and a recent one by Wood worth in California,have been based on the proper assumptions. The other tables wereeither based directly on the cubic contents without regard to leakagesurface, or were4 prepared without any knowledge whatever of thecubic contents represented by trees of given dimensions. Several. FIG. .i.—Man carrying tray and water bucket. (Original.) 20 FUMIGATION INVESTIGATIONS IN CALIFORNIA. belong to the latter class. The following statement and comparativetable have been prepared which indicate the wide range of variationin these schedules: Dosage schedules.—For the information of those who may be inclined to doubtthe writers contentions in this bulletin with relation to the generally chaotic con-dition of fumigation schedules published in the interests of California citrus growers,a table has been prepared which includes nearly all of the more important sched-ules, together with a comparative analysis of the same. The dosages for trees ofgiven dimensions were duly computed. Having this data at hand and utilizingthe dosage allotted to each individual tree, it was possible to work out the rate of
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfumigation, bookyear1
