Publisher's Synopsis
Excerpt from Observations and Experiments on the San Jose Scale
Sulphur shows gain for Orchard I in 1907, on a plot the original infestation of which was degrees, and a gain of percent in Orchard II in 1911 on a plot the original infestation of which was degrees. It is true that the Rex plots in Orchard II agree less closely in the two years, the percent of 1911 being matched by a gain of 49 percent in 1907 but a glance at the grades of infesta tion explains the discrepancy, the 1907 plot having an average grade before treatment of degrees, and the 1911 plot a grade of degrees. We get a more obvious improvement, as a general rule, where the average infestation is the less.
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