Gymnosporangium juniperi-virginianae is a plant pathogen that causes cedar-apple rust. In virtually any location where apples or crabapples Malus and Eastern red-cedar Juniperus virginiana coexist, cedar apple rust can be a destructive or disfiguring disease on both the apples and cedars. On juniper or eastern red cedar, small 3/8 to 1 and 3/16 inches in diameter galls develop throughout the tree on needles and small twigs. When mature, these galls swell considerably and repeatedly produce orange, gelatinous telial horns during rainy spring weather. As spring rains subside, the galls die, which may cause death of the twig from the gall to the tip.
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217298695
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JustAmanda
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進階授權 | PEL | 9248 x 6936 | JPG | 88 | |
進階授權 | UEL | 9248 x 6936 | JPG | 88 |
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標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 600 px | JPG | 15 點 |
標準授權 | 2000 x 1500 px | JPG | 18 點 |
標準授權 | 2581 x 1936 px | JPG | 20 點 |
標準授權 | 3265 x 2449 px | JPG | 22 點 |
標準授權 | 9248 x 6936 px | JPG | 23 點 |
標準授權 | 13079 x 9809 px | TIF | 39 點 |
進階授權 | 9248 x 6936 px | JPG | 88 點 |
進階授權 | 9248 x 6936 px | JPG | 88 點 |
進階授權 | 9248 x 6936 px | JPG | 88 點 |