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This is the first article in a series of brief progress reports on the application of the science of genetics to commercial agriculture.

One of the principal problems confronting California olive growers in certain years is the lack of sufficient set of fruit to assure a profitable yield at harvest time.

Damage to citrus trees by the January freeze now appears to be slight—when the State is considered as a whole.

Investigations on the control of the walnut aphid in northern California were expanded in 1948.

Yield and quality of prunes will vary with the harvesting date according to results obtained from studies made during the 1947 and 1948 seasons in the Sacramento Valley.

Studies by the Division of Pomology at Davis, to determine the value of blackberry varieties for commercial planting— their promise as parental material in a breeding program—includes the new shiny type of the Boysen variety here described for the first time.

The 60 to 100 hours a year spent by the average farmer in keeping financial records is apt to be the most profitable time he spends.

The use of DMC— di-(p-chlorophenyl) methyl carbinol—cannot be recommended, particularly with regard to control of the cyclamen mite, until further experience is gained concerning its effectiveness and the tolerance of plants.