. Dosage tables. Pesticides; Trees. b UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. have been compared with the tables given below with the following results: .40 per cent none .35 per cent 3 .30 per cent 5 .25 per cent 7 .20 per cent 8 .15 per cent 3 .10 per cent none In the above table each fumigator is placed in the class corresponding most closely with the record we have of his actual work. Classifying, again, the same 26 fumigators according to the size of dose, which is quite a different thing from the rate of increase of size shown in the table above, we have Above 5 Purple scale dose 1
. Dosage tables. Pesticides; Trees. b UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. have been compared with the tables given below with the following results: .40 per cent none .35 per cent 3 .30 per cent 5 .25 per cent 7 .20 per cent 8 .15 per cent 3 .10 per cent none In the above table each fumigator is placed in the class corresponding most closely with the record we have of his actual work. Classifying, again, the same 26 fumigators according to the size of dose, which is quite a different thing from the rate of increase of size shown in the table above, we have Above 5 Purple scale dose 1 Red scale dose 10 Black scale dose 5 Below . 5 In both these particulars the leakage basis is thus seen to be in remarkable agreement with the practice of fumigators, simply supplying the means of determining when the system of one fumigator is to be fol- lowed and when that of another. SCHEDULING CHARTS. The study upon which this bul- letin is based was undertaken largely in fulfilment of a promise made in Circular 50, where it was pointed out that while differences of leakage required the use of different bases of calculation it was impossible to specify what chart to use in any par- ticular case. We are now able to give this very necessary information, and we, therefore, reproduce the two charts which give approximately cor- rect dosage for the average tent and for those better than the average. The directions accompanying the charts are revised to include these determinations, as follows:. Fig. 2.—Method of scheduling with a chart. DIRECTIONS FOR USING THE SCHEDULING CHARTS. To use these charts one should first determine the dose for the average sized tree in the orchard to be scheduled by means of the fumigator's rule, after determining the leakage with a leakage Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttrees, bookyear1911
