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Resistance mechanisms against onion pink root (Pyrenochaeta terrestris), bioassay of inoculum potential in soil and chemical control

Creator:: Siemer, Sidney R.
Resource Type:: Dissertation
Full Text:: for Pink Root Resistance 11 Mechanism of Resistance 12 Disease Control 14 MATERIALS AND METHODS 17

Epiphytology and etiology of a Phytophthora-induced root rot disease of Chamaecyparis in Oregon

Creator:: Torgeson, Dewayne Clinton, 1925-
Resource Type:: Dissertation
Full Text:: (40, 41} to be the cause of a root rot disease of Lawson cypress varieties in Oregon nursery and

Poria weirii root rot of Douglas-fir : survival of the pathogen and infection of the host

Creator:: Nelson, E. E.
Resource Type:: Dissertation
Full Text:: pathogen and infection of the host PORIA WEIRII ROOT ROT OF DOUGLAS -FIR: SURVIVAL OF THE PATHOGEN AND

Correlations between horticultural characteristics and Fusarium root-rot resistance in Phaseolus vulgaris L.

Creator:: Wang, Theodora
Abstract:: To study the association between Fusarium root-rot resistance (Fusarium solani f. sp. phaseoli) and economically inportant characteristics of beans, 2259 lines each consisting of 30 plants were used. The lines were randomly selected for root-rot reaction, but were selected for differences in vigor and differences in plant and seed pigments,...
Resource Type:: Dissertation
Full Text:: Maintenance and Inoculum Production 31 for Root-Rot Test Age of Plants at the Time of Disease Classification

Inheritance of resistance to Fusarium root rot in Phaseolus vulgaris L., and Phaseolus coccineus L.

Creator:: Azzam, Hassan Ahmed
Abstract:: Progenies of two bean crosses were studied for inheritance of resistance to dry root rot caused by Fusarium solani f. phaseoli. O.S.C. 22 (P. vulgaris) was used in both crosses as the susceptible parent. A Mexican line (P. vulgaris) and a line 2014 of the runner bean (P. coccineus) were...
Resource Type:: Dissertation
Full Text:: symptom expression of root rot disease has been described by many workers (5» 9» 12, 28, and 29» pp. 3-4

Pink root of onion caused by Pyrenochaeta terrestris

Creator:: Hess, Wilford M., 1934-
Resource Type:: Dissertation
Full Text:: Pyrenochaeta terres tris 48 14. Influence of soil fungicides on incidence of pink root disease and onion

Cultural controls for suppressing Phytophthora cinnamomi root rot of blueberry

Creator:: Yeo, John R.
Abstract:: Phytophthora cinnamomi is a soilborne pathogen that causes root rot disease of highbush blueberry (Vaccinium corymbosum L.). When new installations of susceptible blueberry cultivars are infected with P. cinnamomi, plants often fail to grow significant new tissue, greatly reducing yields over the life of the planting. Chemical fungicides are available...
Resource Type:: Dissertation
Full Text:: -chemical control strategies for blueberry root rot disease, including cultivar selection, soil amendments

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: immunization. The selec- tion and integration of these disease-control procedures, with other agricultural

Effects of nutrient and light limitation on mountain hemlock : susceptibility to laminated root rot

Creator:: Matson, P. A. (Pamela A.)
Abstract:: Mountain hemlock forests in the Oregon Cascades exhibit wave-form dieback resulting from infection by laminated root rot (Phellinus weirii). Although Phellinus remains viable in dead roots after the wave of dieback passes, many regenerating mountain hemlock forests do not become immediately reinfected. We measured at least a doubling of nitrogen...
Resource Type:: Dissertation

Management of variegated cutworm in peppermint

Creator:: Coop, Leonard Bryan
Abstract:: A pest management program for variegated cutworm (VC), Peridroma saucia (Hubner), in Oregon peppermint was developed based on studies of pheromone trapping, sampling methods, and economic thresholds. Pheromone traps effectively trapped VC males and were used to reflect development and oviposition trends. Trap height was linearly correlated to moth catch...
Resource Type:: Dissertation
Full Text:: thresholds (number of larvae/1000 cm2 as a function of peppermint oil price, cost of control, and field class

ScholarsArchive@OSU

Resistance mechanisms against onion pink root (Pyrenochaeta terrestris), bioassay of inoculum potential in soil and chemical control

Epiphytology and etiology of a Phytophthora-induced root rot disease of Chamaecyparis in Oregon

Poria weirii root rot of Douglas-fir : survival of the pathogen and infection of the host

Correlations between horticultural characteristics and Fusarium root-rot resistance in Phaseolus vulgaris L.

Inheritance of resistance to Fusarium root rot in Phaseolus vulgaris L., and Phaseolus coccineus L.

Pink root of onion caused by Pyrenochaeta terrestris

Cultural controls for suppressing Phytophthora cinnamomi root rot of blueberry

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Effects of nutrient and light limitation on mountain hemlock : susceptibility to laminated root rot

Management of variegated cutworm in peppermint

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