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News
27 Jan
Emerging silvicultural tech…
14 Jan
New plant disease reported …
14 Jan
New plant pathogen species …
17 Nov
New article about black pep…
17 Nov
New article about kava (Pip…
Emerging silvicultural tech…
14 Jan
New plant disease reported …
14 Jan
New plant pathogen species …
17 Nov
New article about black pep…
17 Nov
New article about kava (Pip…
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CEDI page: Koa
More than 100 digital photos of pests and diseases of koa (Acacia koa Gray) in Hawaii are provided here to help koa growers diagnose their pest or disease problems. For most images, the resolution and size is set at 150 DPI and (500 x 375) pixels, respectively, to provide sufficient clarity and size to enable the recognition of the more subtle disease characteristics with confidence. Users of this site may request or submit high-resolution images of koa problems by email.
Photo credits: J. B. Friday, Scot Nelson, Wayne Nishijima, Mark Wright, Thom McEvoy Will Haines and Paul Scowcroft.
Photo credits: J. B. Friday, Scot Nelson, Wayne Nishijima, Mark Wright, Thom McEvoy Will Haines and Paul Scowcroft.
Child pages:
- Basal stem damage and decay
- Black twig borer (Xylosandrus compactus)
- Cattle browsing injury
- Coccinellids (lady beetles; beneficial insects)
- Conks (fungal fruiting bodies)
- Fallen tree
- Hardpan
- Hawaiian geometrid caterpillar (insect; Scotorythra paludicola)
- Large koa specimens
- Leafhoppers (probably a cicadellid)
- Lichens
- Mistletoe (Korthlalsella complanata)
- Powdery mildew (Oidium sp.)
- Pruning wound
- Psyllids [the Acacia psyllid (Psylla uncatoides)]
- Root-knot nematodes (Meloidogyne sp.)
- Rust (Atelocauda digitata)
- Rust (Atelocauda koae)
- Scale (cottony-cushiony scale; Icerya purchasi)
- Seedworms (the koa seedworm; Crytophlebia illepida)
- Self girdling (roots)
- Sheep grazing injury
- Stem-boring beetles (Xyloborus spp. and Xylosandrus compactus)
- Vog injury (abiotic; sulfur dioxide gas)
- Whiteflies (spiraling whitefly; Aleurodicus dispersus)
- Wilt (Acacia koaia; Fusarium oxysporum f. sp. koae)
- Wilt (Acacia koa; Fusarium oxysporum f. sp. koae)
- Wood decay (general)
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Copyright © (Scot C. Nelson) 2009 - If you wish to produce a website similar to this site, please contact snelson@hawaii.edu