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Cercospora leaf spot, Freckle of oil palm

General Information Disease of nursery seedlings, which sometimes start in prenursery and is frequently carried to field plantings, where it can survive for many years. The youngest leaves of nursery seedlings become infected and small translucent spots surrounded by yellowish- green haloes enlarge and become dark brown (≤ 0.5 mm in diameter). Conidiophores emerging through […]

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Marchitez letal / Lethal Wilt of oil palm

General Information Symptoms of lethal wilt usually first appear as vascular discolouration and leaf yellowing when the palm is mature (i.e., flowering and fruiting) at seven years old. These symptoms are followed by leaf drying, wilt, and necrosis of infected tissues, and eventual plant collapse. Root necrosis often accompanies leaf discolouration. Internal discolouration of trunk

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Lethal yellowing, lethal yellowing-type disease

General Information The main host of the lethal yellowing (LY) disease is Cocos nucifera. At least 30 other species of palms are susceptible to lethal yellowing and/or lethal yellowing-type disease. LY disease on African oil palm (pure E. guineensis stands, nonhybrids) has been reported from Colombia in 1963. The disease incidence on commercial oil palms

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American palm cixiid (Planthopper)

General Information Myndus crudus is a vector of the lethal yellowing (LY) phytoplasmas (Candidatus Phytoplasma palmae). Lethal yellowing is highly destructive palm disease affecting at least 30 palm species (including Elaeis guineensis and Cocos nucifera). LY involves a prolonged a symptomless phase. External symptoms (e.g. premature nutfall and inflourescence necrosis) begin to show only after

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Leaf miner

General information Hispoleptis subfasciata is a pest of Elaeis guineensis in Colombia and in Brazil. The female beetle forms small depressions in the undersurface of leaves, where it lays eggs in pairs. The larvae mine leaves during feeding, and the pupae remain in the mine. Recently emerged imagoes remain in the tunnel for a few

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Leaf miner

General information Hispoleptis elaeidis is a pest of Elaeis guineensis in Colombia and in Ecuador. The female beetle forms small depressions in the undersurface of leaves, where it lays eggs in pairs. The larvae mine leaves during feeding, and the pupae remain in the mine. Recently emerged imagoes remain in the tunnel for a few

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