| 1265069 |
head smut |
Sphacelotheca reiliana |
Systemic infection of a corn plant with head smut. All ears on the plant are infected. |
| 1400128 |
Tomentosus root disease |
Onnia tomentosus |
Windthrown spruce in Inonotus pocket, in Quebec, Canada. |
| 1400127 |
Tomentosus root disease |
Onnia tomentosus |
Decay in cross section of wood from butt of infected spruce. Quebec, Canada. |
| 0176072 |
spruce broom rust |
Chrysomyxa arctostaphyli |
Witches' broom of spruce taken in early summer, when the aecia are still immature. |
| 1265067 |
head smut |
Sphacelotheca reiliana |
Corn ear infected with head smut: late stage of infection when all that remains of the ear is a dry mass of spores surrounded by fibrous strands of tissues. |
| 0177061 |
spruce broom rust |
Chrysomyxa arctostaphyli |
|
| 0454012 |
Common bacterial blight of beans, fuscous blight |
Xanthomonas axonopodis pv. phaseoli |
Leaf infection of Phaseolus vulgaris by Xanthomonas campestris pv. phaseoli |
| 0177060 |
spruce broom rust |
Chrysomyxa arctostaphyli |
Young Chrysomyxa arctostaphyli broom on spruce |
| 1265068 |
head smut |
Sphacelotheca reiliana |
Corn tassel infected with head smut exhibited 'wire-brush' symptom. |
| 0177062 |
spruce broom rust |
Chrysomyxa arctostaphyli |
|
| 0162081 |
Peach Rosette Mosaic Virus |
Nepovirus PRMV |
|
| 0162080 |
Peach Rosette Mosaic Virus |
Nepovirus PRMV |
on American grape (Vitis labrusca cv. Concord) |
| 0454013 |
Common bacterial blight of beans, fuscous blight |
Xanthomonas axonopodis pv. phaseoli |
Symptoms of Xanthomonas campestris pv. phaseoli infection on Phaseolus vulgaris; note yellow halo around lesions. |
| 0454067 |
Potato Spindle Tuber Viroid |
Pospiviroid PSTVd |
Typical aerial symptoms of potato spindle tuber viroid on potato; cv. Kennebec (in centre); healthy plants (left and right). |
| 5424491 |
comandra blister rust |
Cronartium comandrae |
|
| 1949026 |
laminated root disease |
Phellinus weirii |
Inonotus weirii infection of Pseudotsuga menziesii, showing dead tree and trees with thinned crowns and yellowing. |
| 1949027 |
laminated root disease |
Phellinus weirii |
Wind-thrown 60-year-old Pseudotsuga menziesii, showing advanced Inonotus weirii decay in the roots and root collar; note how the roots break close to the root collar, creating "root balls". |
| 1949028 |
laminated root disease |
Phellinus weirii |
Reddish brown stain typical of infection by Inonotus weirii in a 60-year-old Pseudotsuga menziesii tree; infection does not usually extend much above 2-4 m up the bole in a living tree. |
| 1949010 |
Atropellis canker |
Atropellis pinicola |
Atropellis pinicola on Pinus monticola, showing dead needles on distal portion of a cankered stem. |
| 1949008 |
Atropellis canker |
Atropellis piniphila |
Atropellis piniphila: section through cankered stem, showing characteristic blue-black staining of the wood beneath the canker. |
| 1949009 |
Atropellis canker |
Atropellis pinicola |
Atropellis pinicola on Pinus monticola, showing cankered stem. |
| 0656088 |
Common bacterial blight of beans, fuscous blight |
Xanthomonas axonopodis pv. phaseoli |
Discoloration of Phaseolus vulgaris seeds caused by Xanthomonas campestris pv. phaseoli infection; healthy seeds on left. |
| 0656052 |
western gall rust |
Endocronartium harknessii |
Typical branch gall of Endocronartium harknessii in Pinus with peridia in spring. |
| 0656053 |
western gall rust |
Endocronartium harknessii |
Multiple infection of Pinus contorta by Endocronartium harknessii, showing the typical oblong or pyriform galls. |
| 0656049 |
stalactiform blister rust |
Cronartium coleosporioides |
Typical elongate canker caused by Cronartium coleosporioides, showing white spore blisters containing yellow spore masses. |
| 0656050 |
comandra blister rust |
Cronartium comandrae |
Typical spindle-shaped canker caused by Cronartium comandrae on the mains stem of a Pinus ponderosa seedling; the cracking and pitting of the bark on the swollen areas is caused by erupting aecia. |
| 0656047 |
spruce broom rust |
Chrysomyxa arctostaphyli |
Twigs of a witches' broom on spruce caused by Chrysomyxa arctostaphyli. Living current-year needles covered with aecia (centre) and dead previous year needles still attached. |
| 0656048 |
spruce broom rust |
Chrysomyxa arctostaphyli |
Chrysomyxa arctostaphyli on Picea glauca, showing witches' brooms in late summer, when covered with spermogonia and mature aecia. |
| 5177077 |
edema |
|
|
| 5177078 |
edema |
|
|
| 5177079 |
edema |
|
|
| 5177080 |
edema |
|
|
| 5177081 |
edema |
|
|
| 5177082 |
edema |
|
|
| 5177083 |
edema |
|
|
| 5177084 |
edema |
|
|
| 5177085 |
edema |
|
|
| 0454014 |
Common bacterial blight of beans, fuscous blight |
Xanthomonas axonopodis pv. phaseoli |
Xanthomonas campestris pv. phaseoli infection of green and mature French bean pods (Phaseolus vulgaris). |
| 1265065 |
eye spot |
Kabatiella zeae |
Symptoms on leaves consist of round-to-oval lesions (2-5 mm in diameter) with a tan-to-cream coloured centre and a brown margin surrounded by a yellowish halo, giving the characteristic 'eyespot' appearance. |
| 1265066 |
eye spot |
Kabatiella zeae |
Symptoms on leaves consist of round-to-oval lesions (2-5 mm in diameter) with a tan-to-cream coloured centre and a purple margin surrounded by a yellowish halo, giving the characteristic 'eyespot' appearance. |
