The life stages of Euphyllura olivina include an egg, five nymphal instars, and adults (both sexes). Olive psyllids are very small insects ranging. AGRICULTURAL COMMISSIONER/WEIGHTS AND MEASURES DEPARTMENT. Olive Psyllid (Euphyllura olivina). Distribution: Olive growing regions from. Adult olive psyllid, Euphyllura olivina. Olive. Olive Psyllid. Scientific Name: Euphyllura olivina. (Reviewed 3/14, updated 3/14). In this Guideline.
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In California, psyllid populations decline after June due to the rise in temperature and populations do not recover until the following spring Zalom et al.
When temperatures become optimal again, usually in September, the eupbyllura psyllid nymphs return to an active state Alford Adult males live between 24 and 44 days and females live between 26 and 50 days Meftah et al. Agro technical measures to reduce the pest populations and damage to the olives include quality pruning, suckers and watersprouts removal during summer and autumn-winter period, dense planting avoidance, optimum fertilization by nitrogen fertilizers and selection of an appropriate olive pruning system.
The rate of mortality increases at temperatures above In a study comparing Haouzia, Arbequina, Manzanilla, and Picholine Marocaine varieties and published in the Official Journal of the International Olive Council, scientists discovered olive psyllids performed differently on different olive tree varieties.
EPPO Global Database
University of California Riverside. Feeding may cause flowers to drop prematurely. One infested site in Carmel Valley Monterey County has been recorded. If this is possible, olive production areas in the Central Valley may be threatened by this pest. Pests of fruit crops: The eggs, which take one to two weeks to hatch Alfordare oval in shape, light yellow, and about 0.
Olive psyllid populations may be reduced by pruning. The World Psylloidea Database. The first generation feeds as nymphs beginning in March Alford The third generation of nymphs appears in September and October Zalom et al. There are typically three generations of olive psyllid euphylluura year.
UC Management Guidelines for Olive Psyllid on Olive
Females may lay more than 1, eggs. Some general predators e. When nymphs and adults feed, they rupture plant cells and suck sap from the host plant, reducing levels of nutrients reaching certain parts of the host. Please consider a year-end gift to BugGuide! Euphyllura olivina can be confused with Euphyllura straminea because they are similar in appearance.
Biological activity of a number of parasitic and predatory insects that attack the olive psyllid is basically sufficient to maintain pest populations below economic threshold. These types of losses have not been reported in California. Since in Croatia olive psyllid generally causes little damage to the olive, chemical control, except in rare cases, is not recommended.
How to Manage Pests
Currently, the olive psyllid is not found in Florida, but it does have the potential to spread to new locations via olive tree importation.
Plant suckers shoots at the base of the tree, if they have not been removed, should be inspected for olive psyllids M.
Presently, most infestations of Euphyllura olivina are found in urban and residential areas ilivina San Diego and Orange Counties, where they are confined to ornamental trees around homes, in shopping areas, and parks. The second generation begins feeding in May but becomes inactive going through aestivation once temperatures reach Ferguson, Pomology, UC Davis. Light tan adults are 2. Of special importance is evaluating the ability of Euphyllura olivina to survive summer temperatures in the inland valleys.
General monitoring guidelines for psyllids are:. If Euphyllura olivine is able to establish in the Central Valley, it may be a significant problem for commercial olive producers as well. Females start egg laying when new shoots appear on olive trees. oilvina
The olive psyllid goes through five nymphal stages that range from 0. Additionally the accumulation of waxy secretions from olive psyllids may reduce yield by causing premature flower drop Johnson et al.
Infestations have been seen in olives near vineyards in the Temecula area and in wooded areas near Fallbrook. Description of the pest Damage Management. Euphyllura olivina Costa, The accumulation of honeydew on foliage provides a substrate for development of sooty mold Figure 3which can potentially block sunlight and inhibit photosynthesis, or lead to premature aging of leaves that causes the leaves to drop Laemmlen Females can lay up to 1, eggs during their lifespan Johnson Appraising the threat of olive psyllid to California table olives.
RiversideCA Tel: Large populations may retard the growth of young trees. Infestations were found in and near Temecula Riverside County during the spring and summer of Psyllids generally are monophagous feeding on one plant species or oligophagous feeding on plants within a single family Kabashima et al. The psyllid has been found as far east as Temecula and Escondido.
Most of this was on the higher leaves, just out of reach. The waxy secretion completely covers the nymphs, most likely to hide them from predators or to prevent desiccation M.