Dawn Dailey O'Brien's Images
Title: Extension Support SpecialistOrganization: Cornell University
Unit: Plant Pathology
Country: United States
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Dawn has been the editor of Branching Out, an IPM newsletter for trees and shrubs produced at the Department Plant Pathology and Plant-Microbe Biology at Cornell University since 1996. In addition to her role as editor, Dawn works for the department as webmaster where she designed and maintains the department web site as well as the Vegetable Disease website, Veg MD Online. |
| 39 Images of 32 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5458599 | Ploioderma needle cast of pine | Ploioderma lethale | Ploioderma needlecast fruiting structure in mid-June in upstate New York. |
| 5458622 | blade spruce Gall adelgid | Adelges laricis | Eggs are laid at the base of needles. The newly hatched black colored nymphs can be seen on the needles in this photo. |
| 5458623 | blade spruce Gall adelgid | Adelges laricis | Waxy secretion on larch needles. |
| 5458624 | blade spruce Gall adelgid | Adelges laricis | Eggs are laid at the base of needles. |
| 5458638 | cicada killer | Sphecius speciosus | Cicada killer wasp adult. |
| 5458639 | cicada killer | Sphecius speciosus | Cicada killer wasp adult. |
| 5458640 | cicada killer | Sphecius speciosus | Cicada killer wasp adult. |
| 5458352 | cottony camellia scale | Pulvinaria floccifera | Females (brown) with eggs (cottony white). |
| 5458353 | downy spot | Microstroma juglandis | The fungus sporulates on lower leaf surfaces in a dense white mat of fungal tissue. |
| 5458357 | fourlined plant bug | Poecilocapsus lineatus | Fourlined Plantbug Nymph on forsythia. |
| 5458595 | oak bullet gall | Disholcaspis quercusglobulus | Oak bullet galls caused by cynipid wasps. |
| 5458596 | juniper-pear rust | Gymnosporangium sabinae | Orangish lesion on the upperside of a pear leaf. |
| 5458597 | Rimosus decay | Phellinus robiniae | Fruiting body on trunk. |
| 5458598 | pheromone traps | Dogwood borer pheromone trap. | |
| 5458600 | question mark | Polygonia interrogationis | Question Mark Caterpillar Larva. |
| 5458601 | quince rust | Gymnosporangium clavipes | Cedar-quince rust aecia on hawthorn fruit. |
| 5458602 | quince rust | Gymnosporangium clavipes | |
| 5458603 | Rhabdocline needlecast | Rhabdocline weirii | The fruiting bodies rupture the needle epidermis in spring exposing the spore bearing areas. |
| 5458613 | rose rosette disease | Uncharacterised agent RRD | Witches' broom of rose rosette disease with bright red shoots emerging in the spring. |
| 5458636 | Rhabdocline needlecast | Rhabdocline weirii | Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 5458614 | roundheaded apple tree borer | Saperda candida | Roundheaded apple tree borer adult. |
| 5458615 | black horse fly | Tabanus atratus | black horsefly larva |
| 5458617 | viburnum leaf beetle | Pyrrhalta viburni | Viburnum leaf beetle egg masses are laid on terminal twigs of viburnums. |
| 5458618 | western conifer-seed bug | Leptoglossus occidentalis | Western conifer-seed bug adult on Scots pine. |
| 5458338 | ash flower gall mite | Eriophyes fraxiniflora | Ash flower gall mite damage(distorted male flowers which have turned brown) as it appeared in August. |
| 5458336 | bark lice (Family Psocidae) | Barklice are gregarious and cluster together. | |
| 5458337 | tar spot of maple | Rhytisma acerinum | Black tar-like fruiting structures on the upper side of leaves are diagnostic signs of giant tar spot. |
| 5458349 | balsam gall midge | Paradiplosis tumifex | Galled needles on balsam fir. |
| 5458351 | balsam woolly adelgid | Adelges piceae | Damage in the form of swollen, deformed branches. |
| 5458360 | mountain-ash sawfly | Pristiphora geniculata | |
| 5458358 | rust | Puccinia malvacearum | Hollyhock rust pustules on lower surface of hollyhock leaf. |
| 5458359 | Insolibasidium fungus | Insolibasidium deformans | White bloom of basidia and basidiospores on lower leaf surface. |
| 5458354 | emerald ash borer | Agrilus planipennis | The trap is a purple, three-dimensional triangle constructed of thin, corrugated, plastic that has been coated with non-toxic glue and baited with a lure. |
| 5458355 | euonymus caterpillar | Yponomeuta cagnagella | Euonymus caterpillars in web. |
| 5458356 | ocellate gall midge | Acericecis ocellaris | Eyespot gall on a red maple leaf caused by the larvae of a midge. |
| 5458350 | beefsteak fungus | Fistulina hepatica | |
| 5458049 | elm sawfly | Cimbex americana | Elm sawfly larva on a birch tree leaf in September. |
| 5458050 | eyed click beetle | Alaus oculatus | Adult eyed click beetle on firewood. |
| 5458051 | quince rust | Gymnosporangium clavipes | Gelatinous telial mass oozing out of small branch swelling. |
