Avocado Pest Management Guidelines
UC agricultural management guidelines for control of avocado pests. Manipulating Cultural Practices and Growing Conditions (1/07) Relative Toxicities of Insecticides, Miticides, and Molluscicides Used in Avocados to Natural Enemies and Honey Bees ... [... more]
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Dictyospermum scale: Chrysomphalus dictyospermi
Armored scales are rarely a problem on avocados in California. Armored scales (family Diaspididae) have a flattened, slightly convex cover that at maturity is about 0.06 inch (3 mm) in diameter. This platelike cover usually can be removed to ... [... more]
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Scientific name: Pantomorus cervinus
Adult Fuller rose beetles are brown to grayish snout beetles (weevils, family Curculionidae), about 0.36 inch (9 mm) long. Adults are all females, which lay eggs in clusters of several dozen in crevices on the tree or under loose bark. Larvae ... [... more]
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Pathogen: Avocado Sunblotch Viroid (ASBVD)
Sunblotch causes a wide variety of symptoms or may exhibit no symptoms in some hosts. Symptoms of sunblotch include necrotic, red, yellow, or white discolorations on fruit, often in depressions or scars in the fruit surface. Twigs can develop ... [... more]
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Pathogen: Xanthomonas campestris
Bacterial cankers appear as slightly sunken, dark areas on the bark and vary in size from about 1 to 4 inches in diameter. Bark around cankers may crack. Fluid often oozes and dries, leaving a white powder around or over the lesion. Usually ... [... more]
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Armillaria Root Rot (Oak Root Fungus)
Armillaria is a soil-borne fungus that causes a root and trunk rot of avocado. The fungus can become well established in roots and the root crown before any symptoms become visible above ground. Infected trees usually die prematurely, and young ... [... more]
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Dothiorella Canker
Dothiorella cankers exude reddish sap that dries to a brown and white powder. Bark may be cracked, darkly discolored, or slightly sunken. With older cankers, bark may shed or can be easily removed from the damaged area. Under the canker, inner ... [... more]
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Pathogen: Colletotrichum gloeosporioides
Anthracnose symptoms can develop on flowers, fruit, leaves, or twigs. Infected fruit is the most serious concern, but most fruit damage does not develop until after harvest. External symptoms are difficult to see on ripe 'Haas' fruit because of ... [... more]
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Scientific name: Amorbia cuneana
Western avocado leafroller (family Tortricidae), is primarily a pest of avocado. It occurs in most California groves and occasionally increases dramatically, causing severe fruit damage. This caterpillar also damages citrus, where it is called ... [... more]
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Avocado Root Rot (Phytophthora Root Rot)
UC Management Guidelines for Avocado Root Rot (Phytophthora Root Rot) on Avocado. Foliar symptoms of avocado root rot include small, pale green or yellowish leaves. Leaves often wilt and have brown, necrotic tips. Foliage is sparse and new growth ... [... more]
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Omnivorous Looper
The omnivorous looper (family Geometridae), also called looper or avocado looper, feeds on several dozen plant species. Omnivorous looper occurs in most avocado groves, generally in low numbers, unless natural enemies are disrupted by application ... [... more]
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Avocado Thrips
Avocado thrips (order Thysanoptera) is a key pest that scars fruit. Adults lay eggs hidden inside the underside of leaves, in young fruit, and in fruit petioles. The thrips then develop through two larval and two pupal stages. The first instar is ... [... more]
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