X-disease in peaches, plums and nectarines causes yellow leaves, shot hole and small deformed fruit.
Text Transcript with Description of Visuals
| Audio | Visual |
|---|---|
| X-disease in peaches, plums and nectarines causes yellow leaves, | Wide shot of nectarine tree with yellow leaves present on several limbs. Text on screen reads “Honey Haven nectarines with X-disease phytoplasma”. |
| shot hole, | Close up of nectarine leaves displaying the shot hole symptom. Holes are present throughout the leaves, which also display yellowing and brown patches. |
| and small deformed fruit. | Close up of nectarine fruit that is small, misshapen, and slightly shriveled. |
| Symptoms start as leaf yellowing that progressively gets worse over the course of the season. | Scanning shot over peach tree limbs showing significant leaf yellowing. Text on screen reads “Country Sweet peaches with X-disease phytoplasma”. |
| Premature or early leaf drop may occur in infected trees. | Close up on peach tree limbs with very few leaves. The leaves that are present are yellow and shriveled. |
| Leaves of infected trees may also have interveinal chlorosis and enlargement of the leaf midrib | Close up of leaves displaying interveinal chlorosis. The leaf tissue shows yellowing while the veins of the leaf are green making the veins very apparent. The midrib of the leaf is large and dark green in color. |
| As the season progresses leaves develop lesions. | Zoom in on yellow leaves with brown lesions scattered throughout the leaves. Text on screen reads “Honey Haven nectarines with X-disease phytoplasma”. |
| Lesions fall out creating shot hole and a tattered appearance. | Close up of nectarine tree limb with numerous holes scattered throughout the leaves. |
| Close to harvest, fruit may appear smaller and sometimes deformed. | Close up of a peach that appears small and misshapen. Text on screen reads “”Country Sweet peaches with X-disease phytoplasma”.” |
| Infected trees sometimes also have pear decline or other phytoplasmas as well. | Scan over a plum tree with yellowing and browning of leaves as well as curling of leaves. Text on screen reads ” Friar plums with pear decline”. |
Authors: Scott Harper, WSU Plant Pathology; Tianna DuPont, Cody Molnar, WSU Extension; Garrett Bishop, GS Long. Videography and production: Ricardo Naranjo, WSU Extension
Funded in part by a grant from the Washington State Tree Fruit Research Commission.
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Contacts
Tianna Dupont, WSU Extension (509) 293-8758 tianna.dupont@wsu.edu
Bernardita Sallato, WSU Extension (509) 439-8542 b.sallato@wsu.edu
Ashley Thomson, OSU Extension (541) 296-5494 Ashley.Thompson@oregonstate.edu
Karen Lewis, WSU Extension (509) 760-2263 kmlewis@wsu.edu
