Calag Archive

Sprinkler irrigation has many advantages in deciduous orchards, but also presents problems not found with surface irrigation.

Raking alfalfa hay at the wrong time increases leaf shatter—loss of leaves— and may reduce yield by 20% to 30% which means $8.00 to $12.00 of every $40.00 worth of hay may be left in the field.

Field tests and experiences of many Tulare County grape growers in 1952 showed that a 4% malathon dust gave excellent kill of leafhopper adults and nymphs—in both spring and summer treatments.

Season to season variance in the effectiveness of new chemicals—used as acaricides for spider mite control on apples and pears in northern California—makes it necessary that only tentative toxicity ratings of the acaricides be listed following each season's field investigations.

The predatory mite—Typhlodromus reticulatus or T. cucumeris—which feeds on the cyclamen mite brought and held the pest under fairly good control in strawberry fields during tests in 1952.

Soil fumigation enables a grower to plant' cotton on land infested with root-knot nematode, Meloidogyne incognita var. acrita,—and to obtain yields that give profit above cost of fumigation.

Systemic Insecticides such as Systox— when applied to a plant surface—are absorbed and translocated through the plant tissue.

A single application of systox was sufficient to control the walnut aphid for the entire season in an experimental orchard at Linden.

Control of the two-spotted mite and the valley leaf miner—by a single application of an insecticide-acaracide combination—increased yields of red kidney beans in experiments conducted at Linden in 1952.

Part IX of a series of reports on the effects of packing-house equipment, plant layout, and work methods on efficiency and costs. These studies were made co-operatively by the University of California Giannini Foundation of Agricultural Economics and the United States Department of Agriculture under the authority of the Research and Marketing Act of 1946