Charles S. Vavrina

University of Florida

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Document Type

Co-Authors

George Hochmuth

University of Florida

Sharad C. Phatak

University of Georgia

Donald N. Maynard

University of Florida

John A. Cornell

Population Health Research Institute

Thomas A. Obreza

University of Florida

William M. Stall

University of Florida

Nancy Kokalis-Burelle

U.S. Horticultural Research Laboratory

Stephen M. Olson

University of Florida

Sue Webb

Monash University

W.D. Scott

Purdue University Northwest

Cooperative Institutions

University of Florida

Southwest Florida Research

Agricultural Research Service

University of Georgia

Universitario Francisco de Asís

United States Department of Agriculture

U.S. Horticultural Research Laboratory

North Carolina State University

Indian River State College

Florida Department of Citrus

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Chapter 33: Parsley Production in Florida

EDIS (2019)

George Hochmuth Donald N. Maynard Charles S. Vavrina William M. Stall Richard N. Raid

This document is HS731, Horticultural Sciences Department, UF/IFAS Extension. Published December 2005.

10.32473/edis-cv129-2005

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CELLULOSE ACETATE AS A SOILLESS MEDIUM FOR THE PRODUCTION OF VEGETABLE TRANSPLANTS

Acta Horticulturae (1999)

Charles S. Vavrina

Cellulose acetate

Hydroponics

10.17660/actahortic.1999.481.17

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Citations (1)

Production of High-quality Tomato Transplants with a Novel Buffered Fertilizer

HortTechnology (2002)

Charles S. Vavrina Kathleen M. Brown Robert H. Snyder Mike Orzolek Jonathan P. Lynch

`FTE 30' tomato ( Lycopersicon esculentum ) transplants were produced in Florida under standard commercial conditions and supplied with one of six treatments: zero, low (20% of the control rate), or high (control) super-phosphate (SP) fertilizer, or 0.5%, 1%, or 2% buffered-phosphorous fertilizer (Al-P). Growth characteristics were evaluated for four sets of transplants, produced in January, April, May, and August. Two sets of transplants were grown in the field in Florida (started in January and August) and one set was grown in Pennsylvania during the summer (started in May). Phosphorus concentration in leachate was measured weekly from one crop. Plants grown with Al-P showed a 72% to 88% reduction in P released in leachate compared with the high SP control. Transplants produced with 1% or 2% Al-P were of equal size and quality compared with transplants produced with conventional (high SP) fertilization, and had greater total root length and specific root length (length per unit root weight). Transplants grown with 0.5% Al-P were sometimes smaller than other fertilized treatments, while no-P plants were very small and grew slowly after transplanting. There were no significant differences in growth, yield, or fruit quality of plants fromtransplants grown with 1% or 2% Al-P or high SP at either site. Therefore high quality tomato transplants can be produced using buffered-P fertilizer, while reducing P leaching from the containers.

Transplanting

Lycopersicon

10.21273/horttech.12.4.662

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Citations (4)

Chapter 23: Carrot Production in Florida

EDIS (2019)

George Hochmuth Donald N. Maynard Charles S. Vavrina William M. Stall Kenneth L. Pernezny

This document is HS722, Horticultural Sciences Department, UF/IFAS Extension. Published December 2005.

10.32473/edis-cv120-2005

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Transplant Cell Size Affects Early and Total Yield of Muskmelon

HortScience (1995)

E.T. Maynard Charles S. Vavrina W.D. Scott

Muskmelon ( Cucumis melo L. cvs. Superstar and Mission) transplants were grown in seedling flats with individual cells ranging in volume from 7 to 100 cm 3 . The smallest cells were in a 338-cell polystyrene flat 33 cm wide × 66 cm long × 4.75 cm deep; the largest cells were in a 32-cell plastic flat 30.5 × 50.8 × 6.5 cm. The study was conducted in Florida and Indiana during the 1993 and 1994 growing seasons. Seedlings of uniform age were transplanted to the field and grown to maturity using standard cultural practices. Early yield of `Superstar' muskmelon, measured as number of fruit per plot or percentage of total yield, increased as transplant cell volume increased. In one trial, plants from 7-cm 3 cells produced no early yield, while plants from 100-cm 3 cells produced 40% of the total yield in the first three harvests. In three of the four trials, total yield of `Superstar' increased as cell volume increased. Marketable early yield of `Mission' muskmelon, measured as number or weight per plot, increased as cell volume increased in three of four trials. In Florida, total yield of `Mission' also increased as cell volume increased. Size of `Superstar' fruit was not influenced by cell volume. In Florida, size of early `Mission' fruit increased as cell volume increased.

10.21273/hortsci.30.4.868

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Proceedings of the sixth Symposium on Stand Establishment and ISHS Seed Symposium, Roanoke, Virginia, USA, 15-19 May, 1999

International Society for Horticultural Science eBooks (1999)

A. Lipptay Charles S. Vavrina Gregory E. Welbaum

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Chapter 24: Celery Production in Florida

EDIS (2019)

George Hochmuth Donald N. Maynard Charles S. Vavrina William M. Stall Richard N. Raid

This document is HS723, Horticultural Sciences Department, UF/IFAS Extension. Published December 2005.

10.32473/edis-cv121-2005

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Nitrogen Fertilization of Florida-grown Tomato Transplants: Seasonal Variation in Greenhouse and Field Performance

HortScience (1998)

Charles S. Vavrina George Hochmuth John A. Cornell Stephen M. Olson

Fall-grown tomato ( Lycopersicon esculentum Mill.) transplants were larger than spring-grown transplants when fertilized in the greenhouse with NH 3 NO 3 at 0, 15, 30, 45, 60, or 75 mg·L -1 N in a standard 1/4 strength Hoagland's solution. All transplant growth characteristics measured (stem length, leaf area and number, root and shoot dry mass) increased linearly with increasing N in both seasons. However, in the fall, when greenhouse temperatures and light levels were higher, stem length, leaf area, root: shoot ratio, and the ratio of shoot dry weight: leaf area responded quadratically. In the spring, total fruit yield and production of extra-large fruit increased with increasing transplant N fertilization, but the opposite trend occurred in the fall. These differing seasonal responses suggest fundamental differences in tomato transplant growth that must be addressed by modifications in N fertilization between spring and fall.

Lycopersicon

Dry weight

Fructification

10.21273/hortsci.33.2.0251

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Citations (5)

The Effect of Tetcyclasis on Sweet Corn Growth and Water Use

HortScience (1986)

Charles S. Vavrina James E. Hook Sharad C. Phatak

Abstract The plant growth regulator tetcyclasis applied as a seed treatment [75% wettable powder (WP)] had growth-retarding effects on sweet corn ( Zea mays L. ‘Silver Queen’), and modified water use. Tetcyclasis at rates of 0.05, 0.1, and 0.2 g a.i./kg of seed significantly retarded top growth, while having no effect on root length for 28 days after planting. Water use on a per gram of plant tissue basis tended to be lower under cool-season conditions and equal under warm-season conditions among tetcyclasis seed treatments as compared to nontreated controls. Chemical names used: 5- (4-chlorophenyl)-3,4,5,9,10-pentaaza-tetracyclo(5,4,l,0 2,6 ,0 8,11 ) dodeca-3,9-diene (tetcyclasis).

Wettable powder

Growing season

10.21273/hortsci.21.6.1414

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Citations (2)

Estimating The Economic Gains From Larger Tomato Transplant Cell Sizes

2000 Annual meeting, July 30-August 2, Tampa, FL (2000)

Fritz Roka Charles S. Vavrina

This paper examines the costs and economic benefits of utilizing larger seedling transplant in commercial vegetable production. Larger transplants have been shown to mature earlier and yield more premium graded fruit. Offsetting these benefits is the increased cost of producing larger transplants, primarily from reducing the capacity of a transplant house.

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