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Page 3 of 3
Aphid Control With Benefits
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Aphid Control Trials
The chart below indicates prune aphid control using different rates of materials
applied in University of California trials in fall 2003 and winter 2004.
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Material
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Timing
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Application type, spray volume (gallons per acre)
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Rate
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Aphid control rating
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Asana
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Oct. 30
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Handgun, 400
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2 oz/acre*
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Excellent
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Asana
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Nov. 14
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Speed sprayer, 100 g
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3 oz/acre
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Excellent
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Asana
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March 9
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Handgun, 400
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2 oz/acre*
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Good
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Diazinon 4E
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Oct. 30
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Handgun, 400 g
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2 pints/acre*
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Good
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Diazinon 4E
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Nov. 14
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Speed sprayer, 100 g
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1 pint/acre
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Excellent
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Diazinon 4E
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March 9
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Handgun, 400 g
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2 pints/acre*
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Excellent
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Imidan 70WP (phosmet)
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Oct. 30
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Handgun, 400 g
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4.25 pounds/acre*
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Excellent
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Imidan 70WP
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Nov. 14
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Speed Sprayer, 100 g
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4.25 pounds/acre
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Excellent
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Imidan 70WP
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March 9
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Handgun, 400 g
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4.25 pounds/acre*
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Good
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Imidan 70WP
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Oct. 30
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Handgun, 400 g
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2.12 pounds/acre*
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Good
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Imidan 70WP
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Nov. 14
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Speed Sprayer, 100 g
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2.12 pounds/acre
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Excellent
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Imidan 70WP
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March 9
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Handgun, 400 g
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2.12 pounds/acre*
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Good
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*Applied with 4 gallons of spray oil/acre.
Spray water was buffered to below 6.0 pH prior to addition of pesticide in all Imidan70WP treatments.
Aphid control ratings: EXCELLENT = no additional treatment needed, GOOD = some aphids, grower's choice if additional control needed, POOR = Additional treatment required.
Trials were conducted by Carolyn Pickel, Bill Olson, Sean Miller, Gurminder Sandher, and Franz Niederholzer, UC Cooperative Extension; Butte, Sutter, and Yuba Counties.
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Back to Aphid Control With Benefits - Page 1
If you have questions about any of the research results presented in this article, please contact University of California Cooperative Extension. Contact information is on the Web at
fruitsandnuts.ucdavis.edu/crops/prune.shtml
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