File:Conyza sumatrensis leaf1 Rylestone (15006775522).jpg
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DescriptionConyza sumatrensis leaf1 Rylestone (15006775522).jpg | Introduced, warm-season, annual, erect, yellowish green herb. Stems are covered in long spreading hairs and grow to 2 m tall. Leaves are bristly and form a rosette when young. Lower leaves are toothed and upper leaves are entire. Flowerheads are panicles with numerous creamy heads (4-6 mm long) that have pale and densely hairy bracts. Heads become white puff balls at maturity. Flowering is mostly from summer to late autumn. A native of North America, it is a common weed of disturbed pastures, roadsides, cultivation and wasteland. A minor weed in pasture situations; it is an indicator of disturbance, low ground cover and/or weak pastures. Primary control is by maintenance of good ground cover, especially from autumn to late spring. Can be hand-pulled, but plants need to be removed to prevent seed drop. Slashing at the beginning of flower emergence will reduce seed set. If it needs to be sprayed, apply registered herbicides at the seedling to early rosette stage. |
Date | |
Source | Conyza sumatrensis leaf1 Rylestone |
Author | Harry Rose from South West Rocks, Australia |
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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/15006775522. It was reviewed on 26 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 May 2015
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current | 14:30, 26 May 2015 | 3,000 × 4,000 (5.84 MB) | Amada44 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/160 sec (0.00625) |
F-number | f/2.8 |
ISO speed rating | 80 |
Date and time of data generation | 13:48, 17 July 2014 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Microsoft Windows Photo Viewer 6.1.7600.16385 |
File change date and time | 19:44, 23 August 2014 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 13:48, 17 July 2014 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 7.3125 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Unique image ID | dc669f231498e1a52e32a240ca802e8d |
Keywords |
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IIM version | 4 |