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Filtering by: Academic Affiliation Horticulture Remove constraint Academic Affiliation: Horticulture Committee Member Appleby, Arnold P. Remove constraint Committee Member: Appleby, Arnold P. Decade 1990-1999 Remove constraint Decade: 1990-1999 Language English [eng] Remove constraint Language: English [eng]

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Role of surfactants in foliar uptake of plant growth regulators

Creator:

Tan, Siyuan

Abstract:

Penetration of ¹⁴C-labeled plant growth regulators into the surface of apple (Malus pumila M.) leaves pre-soaked in 10 ml I⁻¹ solutions of surfactant was measured by detecting changes in radioactivity of the solution in glass cylinders sealed to the astomatal, adaxial surface of the leaf discs. Penetration of 2,4-D [(2,4-dichlorophenoxy)acetic...

Resource Type:

Dissertation
Modeling purple nutsedge (Cyperus rotundus L.) growth : preliminary evaluation of light intensity, soil moisture and herbicide effects

Creator:

Amerasinghe, A. A. L.

Abstract:

Purple nutsedge [Cyperus rotundas L.) has been recognized as one of the most troublesome perennial weeds of agricultural lands in tropical and some temperate regions. This research sought to determine the effects of timing of herbicides, shading, and soil moisture on plant population growth and tuber production of purple nutsedge...

Resource Type:

Dissertation
Water partitioning and respiration activity of dormant grape buds

Creator:

Gardea, Alfonso A.

Abstract:

Dormancy of 'Pinot Noir' grapevines was characterized. Primary buds required ca 300 cumulative chilling hours (CCH) to initiate the transition from endodormancy to ecodormancy, which occurred in mid November. Additional chilling, up to 1000 CCH, improved budbreak. Changes in bud water content were estimated by gravimetric and spectroscopic methods. Total,...

Resource Type:

Dissertation
Girdling and shading effects on inflorescence necrosis and rachis composition of pinot noir grapevine

Creator:

Ibacache, Antonio E.

Abstract:

There are several grape disorders that reduce fruit set. One, millerandage, is from poor fertilization to produce "hen and chicken" or small seedless berries; while another, Coulure, is the failure of grape flowers to develop into berries. A third one, inflorescence necrosis (INec), is a disorder that should be in...

Resource Type:

Masters Thesis
Enhancement of the weed competitive ability of lowland rice (Oryza sativa L.) cultivars

Creator:

Ranasinghe, Lakshman L.

Abstract:

Most of the presently grown cultivars of rice (Oryza sativa L.) have poor competitive ability against weeds if compared with traditional cultivars. Therefore, effective weed control is an important but often costly and difficult management practice in rice crop production. If weed competitive ability of rice cultivars could be improved...

Resource Type:

Dissertation

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Academic Affiliation

Horticulture[remove]5

Advisor

Crabtree, Garvin D.3
Lombard, Porter B.2

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1991 to 1996

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Committee Member

Appleby, Arnold P.[remove]5
Azarenko, Anita N.2
Radosevich, Steven R.2
Conklin, Frank1
Fuchigami, Leslie H.1
more Committee Members »

Creator

Amerasinghe, A. A. L.1
Gardea, Alfonso A.1
Ibacache, Antonio E.1
Ranasinghe, Lakshman L.1
Tan, Siyuan1

Date

Date range begin – Date range end

Current results range from 1990 to 1995

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Decade

1990-1999[remove]5

Degree Field

Horticulture5

Degree Level

Doctoral4
Master's1

Degree Name

Doctor of Philosophy (Ph.D.)4
Master of Science (M.S.)1

Language

English [eng][remove]5

Non-Academic Affiliation

Oregon State University. Graduate School5

Peer Reviewed

No5

Resource Type

Dissertation4
Masters Thesis1

Rights Statement

Copyright Not Evaluated5

Subject

Apples -- Physiology1
Echinochloa crusgalli -- Control1
Grapes -- Diseases and pests1
Grapes -- Dormancy1
Grapes -- Effect of temperature on1
more Subjects »

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