Biology Reference
In-Depth Information
Pigeon Pea Golden Mosaic
Begomovirus
Poplar Decline Potyvirus
Pinwheel structures are induced in infected cells.
Main disease symptoms are chlorotic and
necrotic leafspots, necrosis of leaves and death
of branches and even whole trees.
On pigeon pea.
Pineapple Wilt - Associated
Closterovirus
Poplar Mosaic Carlavirus
Occurs in the Hawaiian pineapples causing
yellowing and flecks on leaves, leaf tip necrosis
and plant wilt.
Many cultivars are symptomless or they develop
mosaics or necrosis. Virus usually occurs alone in
infected poplar trees.
Plantago Mottle Tymovirus
Potato A Potyvirus
Related to Andean Potato Latent, Dulcamara
Mottle, Belladonna Mottle, Onion Yellow
Mosaic and Turnip Yellow Mosaic Viruses.
KnownasPotatoMildMosaic,PotatoVirusPand
Solanum Virus 3. Transmitted by aphids in non-
persistent manner. Virus caused no symptoms.
Plum Line Pattern
¼
Plum American
Line Pattern Ilarvirus
Potato Acropetal Necrosis
On plum, oriental cherry, widespread. Some
plum varieties have yellow vein banding, brilliant
green and yellow patterns of the oakleaf type,
formed by single or multiple irregular lines or
bands; in early summer the yellow fades to
creamy white. In other varieties patterns are
faint or absent. On flowering cherries discolored
areas are bounded by a chlorotic band. Transmis-
sion is by budding or grafting.
Caused by potato viruses Y and X.
Potato Aucuba Mosaic Potexvirus
Bright yellow mottle in most varieties, some-
times necrosis of tubers.
Potato Bouquet Disease
Caused by Tobacco Ring Spot Nepovirus.
Plum White Spot
Potato Calico
Small pale yellow to white spots, mostly aggre-
gated near leaf tips on Santa Rosa plum.
Caused by strain of Alfalfa/Mosaic Alfamovirus.
Potato Crinkle
Poinsettia Mosaic Tymovirus
Mild Mosaic. Due to Potato Virus X plus A. Leaf
mottling and crinkling are often inconspicuous,
but plants die prematurely. Plant healthy tubers;
Caused systemic leaf mosaic and malformation
and discoloration of bracts.
