Of other genuine naturalists I have read, but he is the only one I ever knew." This is hardly too strong a statement of the loyalty entertained toward this eminent man by those who had the privilege of being his pupils in Natural History. In him there lived for us the very spirit of Linnaeus, or whatever name best represents the simplest and purest type of the naturalist. The personal attachment thus won, the healthy influence thus exerted, and the slow and gradual recognition of the merit of his methods, are a form of success more congenial to the temperament of Dr.Harris than would have been any more immediate and superficial applauses.Xll MEMOIR.

No abstract

A highly refined horticultural petroleum oil, Sunspray Ultra Fine, was evaluated in laboratory and field tests for efficacy against summer eggs and larvae of European red mite, Panonychus ulmi (Koch). Oil had significant ovicidal and residual larvicidal activity in dip treatments at rates as low as 0.00005%, but treatments using the same rates in a Potter spray tower caused less mortality. High-contact mortality of mite larvae sprayed in laboratory tests was obtained at rates of 0.25-1.00%. Field applications of oil by airblast sprayer were tested during the summer for their ability to suppress mite populations throughout the growing season. Effective control was achieved with three applications of oil at 3 and 2%, starting at the petal-fall stage and continuing on a 2-3-wk schedule. A rate of 1% provided control under conditions of moderate population pressure but required an additional spray in late July under severe population pressure. Rates of 0.25 and 0.05% resulted in unacceptable mite numbers by midsummer. Phytotoxicity caused by the oil was most severe at the higher rates, but oil caused no leaf drop even when trees were moisture-stressed. No effects of oil were seen on fruit finish or color, except for an increase in scarf skin of 'Law Rome' at the highest rates. High-pressure handgun oil sprays against a mixed population of mite eggs, immatures, and adults reduced motile forms by 79-95% at rates of 2:0.25%.

No abstract

Of other genuine naturahsts I have read, but he is the only one I ever knew." This is hardly too strong a statement of the loyalty entertained toward this eminent man by those who had the privilege of being his pupils in Natural History. In him there lived for us the very spirit of Linn^us, or whatever name best represents the simplest and purest type of the naturalist. The personal attachment thus won, the healthy influence thus exerted, and the slow and gradual recognition of the merit of his methods, are a form of success more congenial to the temperament of Dr. Harris than would have been any more immediate and superficial applauses. XU MEMOIR.