Prune Pest Management Guidelines
UC agricultural management guidelines for control of prune pests. Relative Toxicities of Insecticides and Miticides Used in Prunes to Natural Enemies and Honey Bees (6/06) Prune Weed Photo Gallery, with Common and Scientific Names ... [... more]
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HOW TO MONITOR (View photos of aphids for identification.)
Information about Spring/Summer Monitoring for Aphids in Prunes. Stop the search and treat. See the mealy plum or leaf curl plum aphid sections for treatment choices. Monitor mealy plum aphid and leaf curl plum aphid in spring if a dormant or ... [... more]
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Scientific name: Synanthedon exitiosa
Gum exuding from around the base of the trunk is evidence of a peachtree borer infestation. Larvae of the peachtree borer are white with brown heads. Adults are clear-winged moths with blue-black bodies that have yellow or orange bands across the ... [... more]
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Scientific Name: Archips argyrospila
Adult fruittree leafroller moths are about 0.5 inch long, with rusty brown wings marked with areas of white and gold. When at rest, the adults show the typical bell-shaped pattern common to the family Tortricidae. The eggs are laid in masses on ... [... more]
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WHEN TO PUT OUT TRAPS
Use the information obtained from trap catches can be used to schedule control actions when used in conjunction with degree-day calculations. The traps are used to establish a biofix-an identifiable point in the life cycle of the pest at which ... [... more]
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Phytophthora Root and Crown Rot
The most effective ways to manage Phytophthora root and crown rot are to select a good planting site, select an appropriate rootstock, and properly manage irrigation water. Fungicides are also available to treat soil around newly planted trees. ... [... more]
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HOW TO SAMPLE (View photos of pests for identification.)
Information about Dormant Spur Sample and Treatment Guidelines. Dormant spur sampling is used primarily to determine the need for a dormant treatment to control San Jose scale and European fruit lecanium. If mealy plum aphid and leaf curl plum ... [... more]
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Leaf Curl Plum Aphid
The leaf curl plum aphid is often found inside curled leaves. It is shiny and varies considerably in color from green brownish to green or brownish yellow. This aphid overwinters in the egg stage near the base of buds. In spring it rapidly builds ... [... more]
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Scientific name: Diaspidiotus (=Quadraspidiotus) perniciosus
San Jose scale, a major pest of fruit trees, is inconspicuous and usually not noticed until it builds up to large numbers on limbs. If trees have received repeated aerial dormant applications, they can build up on the undersurface of branches. ... [... more]
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Scientific name: Epidiaspis leperii
Italian pear scale covering is circular, shiny light gray, and has a brown exuvia slightly off center. The body under the scale covering is dark reddish purple. The scale is often found under moss and lichen on old prune trees. This scale ... [... more]
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Fall cankerworm: Alsophila pometaria
Cankerworm larvae have three pairs of prolegs. They are greenish above, with three narrow, whitish stripes and one yellow stripe along the side of the body; underparts are light green. Cankerworms frequently stand on the posterior pair of prolegs ... [... more]
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Relative Impact of the Timing of Pesticide Applications ...
Information about Relative Impact of the Timing of Pesticide Applications on Natural Enemies in Prune. 3 IGR = insect growth regulator (Dimilin, Intrepid, Esteem, Seize) 5 Inseason use of some IGRs (e.g., methoxyfenozide-Intrepid) has a ... [... more]
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