Undated: Karel [Jacobs] to George Ware (3.44621)
Creator: Jacobs, Karel
Type: Document
Description:Note from Karel [Jacobs] to George Ware asking for information about resistant elm availability so that she is better informed at the Plant Clinic.
Extent: 1 sheet
A new member of the clover proliferation phytoplasma group (16SrVI) associated with elm yellows in Illinois (3.55241)
Date: 2003Creator: Jacobs, Karel, Miller, Fredric D.
Type: Article
Long-Term Changes in an Oak Forest's Woody Understory and Herb Layer with Repeated Burning (3.55270)
Date: 2007Creator: Bowles, Marlin L., Jacobs, Karel, Mengler, Jeff
Type: Article
Control of apple scab and cytospora canker with Paclobutrazol (3.55307)
Date: 2012Creator: Watson, Gary W., Jacobs, Karel
Type: Article
Two decades of low-severity prescribed fire increases soil nutrient availability in a Midwestern, USA oak (Quercus) forest (3.55318)
Date: 2012Creator: Scharenbroch, Bryant C., Jacobs, Karel, Bowles, Marlin L.
Type: Article
The effects of prescribed burning on soil and litter invertebrate diversity and abundance in an Illinois oak woodland (3.55378)
Date: 2015Creator: Jacobs, Karel, Scharenbroch, Bryant C.
Type: Article
Variation in field susceptibility of native and exotic ash species to anthracnose (3.57531)
Date: 2000Creator: Jacobs, Karel, Danielson, Donna
Type: Article
Inhibition of fungal pathogens of woody plants by the plant growth regulator paclobutrazol (3.57532)
Date: 2000Creator: Jacobs, Karel
Type: Article
The effect of Biobarrier on mycorrhizae in oak and sweetgum (3.57533)
Date: 2000Creator: Jacobs, Karel
Type: Article
Dutch Elm Disease in the Chicago Area 1970-1996 (3.57534)
Date: 1999Creator: Jacobs, Karel, Danielson, Donna
Type: Article
Botryosphaeria dothidea breaks endodormancy and reduces cold hardiness in Cercis canadensis (3.57535)
Date: 1999Creator: Jacobs, Karel, Shirazi, Abbas
Type: Article
Current DED outbreaks are caused by the same old fungi, but one has a new name (3.57537)
Date: 1998Creator: Jacobs, Karel
Type: Article
How much did the severe outbreak of scab on crabapple in 1995 influence scab levels in 1996? (3.57538)
Date: 1998Creator: Jacobs, Karel
Type: Article
Comparison of cultural and morphological characters and ITS sequences in anamorphs of Botryosphaeria and related taxa (3.57539)
Date: 1998Creator: Jacobs, Karel
Type: Article
The effect of flooding and Phytophthora root rot on ornamental cherry (3.57541)
Date: 1996Creator: Jacobs, Karel
Type: Article
Differential resistance to Entomosporium leafspot disease and hydrogen cyanide potential in photinia (3.57542)
Date: 1996Creator: Jacobs, Karel, Dirr, Michael
Type: Article
High and low performing crabapples during abnormally high desease pressure (3.57543)
Date: 1996Creator: Jacobs, Karel
Type: Article
U.S. National Arboretum is working toward sustainable production of pathogen free compost and mulch (3.57544)
Date: 1995Creator: Jacobs, Karel
Type: Article
Screening three Cercis species for resistance to Verticillium Wilt (3.57545)
Date: 1994Creator: Jacobs, Karel
Type: Article
The identification of Armillaria species in California (3.57546)
Date: 1994Creator: Jacobs, Karel
Type: Article
First report of Phytophthora cactorum causing root and collar rot of apple in NE Spain (3.57547)
Date: 1994Creator: Jacobs, Karel
Type: Article
The effect of water stress on infection and canker development of Botryosphaeria stevensii, Hypoxylon mediterraneum, and Coryneum sp on cork oak. (3.57548)
Date: 1993Creator: Jacobs, Karel
Type: Article
The effect of low oxygen stress on disease development of Phytophthora cinnamomi in Quercus suber roots (3.57549)
Date: 1992Creator: Jacobs, Karel
Type: Article
Conidial nuclei in three species of Diatrypaceae and Diaporthe vaccinii (3.57550)
Date: 1988Creator: Jacobs, Karel
Type: Article
Evolutionary aspects of ascospore and conidium ontogeny in Scoleconectria cucurbitula (3.57551)
Date: 1988Creator: Jacobs, Karel
Type: Article
Mycorrhizal Fungi and Cold-Assisted Symbiotic Germination of the Federally Threatened Eastern Prairie Fringed Orchid, Platanthera leucophaea (Nuttall) Lindley (3.57661)
Date: 2000Creator: Jacobs, Karel, Bowles, Marlin L., Zettler, Lawrence W.
Type: Article
Rooting Responses of Three Oak Species to Low Oxygen Stress (3.57662)
Date: 1997Creator: Jacobs, Karel
Type: Article
The Effect of Low Oxygen Stress on Phytophthora cinnamomi Infection and Disease of Cork Oak Roots (3.57664)
Date: 1997Creator: Jacobs, Karel
Type: Article
Differential Resistance to Botryosphaeria ribis Among Cercis Taxa (3.57665)
Date: 2002Creator: Jacobs, Karel
Type: Article
Soil Aeration and Tree Health: Correlating Soil Oxygen Measurements With the Decline of Established Oaks (3.57667)
Date: 1991Creator: Jacobs, Karel
Type: Article
Plant Health Care Report: April 21-April 26, 1997 (3.59218)
Date: 1997Creator: Danielson, Donna, Jacobs, Karel
Type: Serial
Plant Health Care Report: April 27-May 2, 1997 (3.59219)
Date: 1997Creator: Danielson, Donna, Jacobs, Karel
Type: Serial
Plant Health Care Report: May 3-May 9, 1997 (3.59220)
Date: 1997Creator: Danielson, Donna, Jacobs, Karel
Type: Serial
Plant Health Care Report: May 10-May 16, 1997 (3.59221)
Date: 1997Creator: Danielson, Donna, Jacobs, Karel
Type: Serial