Whitewash found harmless in applications on walnut leaves
AuthorsJ. H. Foott
D. R. Heinicke
Authors AffiliationsJ. H. Foott is Farm Advisor, Salt Luis Obispo County, University of California, Agricultural Extension Service; D. R. Heinicke is Pomologist, Canada Department of Agriculture (developer of the CO airstreams measuring device used in these tests).
Hilgardia 21(3):2-3. DOI:10.3733/ca.v021n03p2b. March 1967.
Whitewash applied to the leaves of Persian walnut trees of the Payne variety showed no injury to the leaf and did not interfere with photosynthesis. There was no significant effect on total yield in the whitewash tests, but the percentage of larger, sound nuts increased. These studies also indicated that temperatures above 90°F were very detrimental to photosynthesis and temperatures of 95°F or above stopped it completely.
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Precision planting for cannery tomatoes
A progress report… olive yield decline study in Tehama County
Herbicides for control of annual weeds in California apples and pears
Control of powdery mildew on cantaloupe
Control of aphids on barley • economic treatment levels • analysis of yield increases
Lumber grade recovery in a circular-saw mill in California