scholarly journals Botryosphaeria Stem Blight on Southern Highbush Blueberry in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (2) ◽  
Author(s):  
Norma C. Flor ◽  
Douglas A. Phillips ◽  
Philip F. Harmon
Keyword(s):  
United States ◽  
Plant Pathology ◽  
Vascular Disease ◽  
Abiotic Stresses ◽  
Southern United States ◽  
Highbush Blueberry ◽  
Stem Blight ◽  
Pathology Department ◽  
Advanced Stages ◽  
Southern Highbush

Botryosphaeria stem blight is the most common and damaging fungal vascular disease on southern highbush blueberry in the southern United States, causing stem and cane dieback and reductions in yield. Advanced stages of this disease may cause premature plant death, which results in significant replanting costs for growers. Biotic or abiotic stresses from a variety of sources can make plants more susceptible to infection by stem blight pathogens. This new 5-page publication is intended for Florida blueberry growers to use as a guide in the identification and management of Botryosphaeria stem blight on southern highbush blueberry. Written by Norma C. Flor, Douglas A. Phillips, and Philip F. Harmon and published by the UF/IFAS Plant Pathology Department. http://edis.ifas.ufl.edu/pp347

scholarly journals Anthracnose on Southern Highbush Blueberry

EDIS ◽  
2018 ◽  
Vol 2018 (3) ◽  
Author(s):  
Douglas A Phillips ◽  
Maria C. Velez-Climent ◽  
Philip F. Harmon ◽  
Patricio R. Munoz
Keyword(s):  
Plant Pathology ◽  
Fungal Pathogens ◽  
Highbush Blueberry ◽  
Pathology Department ◽  
Wide Range ◽  
Highbush Blueberries ◽  
Southern Highbush

Information contained in this 4-page publication is intended for Florida blueberry growers to use as a guide in the identification of anthracnose, a group of fungal pathogens that affects a wide range of plants, including southern highbush blueberries (SHB). Written by Douglas A. Phillips, Maria C. Velez-Climent, Philip F. Harmon, and Patricio R. Munoz and published by the UF/IFAS Plant Pathology Department, May 2018.https://edis.ifas.ufl.edu/pp337

scholarly journals Florida Blueberry Leaf Disease Guide

EDIS ◽  
2019 ◽  
Vol 2019 (3) ◽  
Author(s):  
Douglas A. Phillips ◽  
Norma C. Flor ◽  
Philip F. Harmon
Keyword(s):  
Plant Pathology ◽  
Environmental Conditions ◽  
Production Systems ◽  
Highbush Blueberry ◽  
Basic Information ◽  
Management Options ◽  
Pathology Department ◽  
Leaf Spots ◽  
Southern Highbush ◽  
Leaf Symptoms

Southern highbush blueberry (SHB) cultivars are commercially grown throughout much of Florida, in both deciduous and evergreen production systems. In both systems, leaves can be damaged by many factors including environmental conditions, chemical applications, insects, and diseases. This new 12-page publication of the UF/IFAS Plant Pathology Department includes basic information to assist growers in determining 1) the likely cause (fungal, viral, algal, or bacterial) of leaf symptoms, 2) when specific leaf spots are likely to occur, 3) characteristic symptoms of common leaf problems, and 4) some of the management options that are available. Written by Douglas A. Phillips, Norma C. Flor, and Philip F. Harmon. http://edis.ifas.ufl.edu/pp348

scholarly journals Identification of Species in the Botryosphaeriaceae Family Causing Stem Blight on Southern Highbush Blueberry in Florida

Plant Disease ◽  
2010 ◽  
Vol 94 (8) ◽  
pp. 966-971 ◽  
Author(s):  
A. F. Wright ◽  
P. F. Harmon
Keyword(s):  
Population Change ◽  
Elongation Factor ◽  
Fungal Species ◽  
Highbush Blueberry ◽  
Internal Transcribed Spacer Region ◽  
Stem Blight ◽  
The Family ◽  
Identification Of Species ◽  
Time Of Year ◽  
Southern Highbush

Stem blight of southern highbush blueberry (SHB) results in premature plant mortality and has been identified by Florida blueberry growers as the economically most important disease for the industry. In 2007, plants with stem blight and dieback symptoms were sampled at 4-month intervals from two farms located in Alachua and Polk Co., FL. In all, 30 cane samples (stem blight) and 30 crown segments (dieback) were collected at each sample date and each location. In total, 360 samples were collected; fungal species in the family Botryosphaeriaceae were isolated from 85% of the samples. Based on morphology and phylogenetic analysis of the internal transcribed spacer region and elongation factor 1-α (EF1-α) sequences, two dominant species recovered from SHB in Florida were identified: Lasiodiplodia theobromae and Neofusicoccum ribis. Species isolation was independent of location, symptom type, and time of year. Additional samplings are needed to investigate population change over multiple years and in the rest of the southeastern United States. Breeding for resistance and management of stem blight and dieback in Florida should focus on these two fungal species.

scholarly journals The Genetic Composition and Tetrasomic Inbreeding Coefficients of Highbush Blueberry Cultivars

HortScience ◽  
1994 ◽  
Vol 29 (11) ◽  
pp. 1342-1345 ◽  
Author(s):  
Mark K. Ehlenfeldt
Keyword(s):  
United States ◽  
Vaccinium Corymbosum ◽  
Southern United States ◽  
Highbush Blueberry ◽  
Genetic Composition ◽  
Tetrasomic Inheritance ◽  
Inbreeding Coefficients ◽  
Inheritance Model ◽  
Recent Trends ◽  
Per Se

Inbreeding coefficients were calculated for highbush blueberry (Vaccinium corymbosum L.) cultivars based on a tetrasomic inheritance model. This model yielded lower inbreeding coefficients than previous calculations based on a disomic tetraploid inheritance model. Recent trends in breeding have resulted in significant use of V. darrowi Camp as a source of low-chilling germplasm for use in the southern United States. There is also a trend toward increased inbreeding in several crosses from which recently released cultivars have been derived. Increased inbreeding coefficients do not represent a detrimental situation in blueberry per se.

scholarly journals Infection of Blueberry Cultivar ‘Emerald’ with a California Pierce’s Disease Strain of Xylella fastidiosa and Acquisition by Glassy-Winged Sharpshooter

Plant Disease ◽  
2020 ◽  
Vol 104 (1) ◽  
pp. 154-160
Author(s):  
Lindsey P. Burbank ◽  
Mark S. Sisterson ◽  
Michael L. O’Leary
Keyword(s):  
United States ◽  
Xylella Fastidiosa ◽  
Southeastern United States ◽  
San Joaquin Valley ◽  
Pierce's Disease ◽  
Highbush Blueberry ◽  
Homalodisca Vitripennis ◽  
Pierce’S Disease ◽  
Fastidiosa Strain ◽  
Southern Highbush

Bacterial leaf scorch disease caused by Xylella fastidiosa occurs in southern highbush blueberry varieties in the southeastern United States. Susceptibility to X. fastidiosa varies by blueberry cultivar, and these interactions are often strain-specific. Xylella fastidiosa subsp. fastidiosa is the causal agent of Pierce’s disease in grapevines, and it has been problematic in the San Joaquin Valley of California since the introduction of the glassy-winged sharpshooter (Homalodisca vitripennis). The glassy-winged sharpshooter is known to feed on blueberry, a crop that is expanding in the San Joaquin Valley. Currently, little is known about the potential for the spread of X. fastidiosa between grape and blueberry in this region. The ability of a Pierce’s disease strain of X. fastidiosa from the San Joaquin Valley to cause disease in southern highbush blueberry and the potential for the glassy-winged sharpshooter to transmit X. fastidiosa between blueberry and grapevine were investigated. Experimental inoculations showed that the X. fastidiosa subsp. fastidiosa strain Bakersfield-1 can cause disease in blueberry cv. Emerald, and that the glassy-winged sharpshooter can acquire X. fastidiosa from artificially inoculated blueberry plants under laboratory conditions. Understanding the possibility for X. fastidiosa strains from the San Joaquin Valley to infect multiple crops grown in proximity is important for area-wide pest and disease management.

scholarly journals Effects of Fertilizer Rate on Growth and Fruiting of Containerized Southern Highbush Blueberry

HortScience ◽  
2008 ◽  
Vol 43 (1) ◽  
pp. 143-145 ◽  
Author(s):  
Wendy L. Wilber ◽  
Jeffrey G. Williamson
Keyword(s):  
Plant Growth ◽  
Pine Bark ◽  
Growth And Yield ◽  
Highbush Blueberry ◽  
Flower Bud ◽  
Soil Culture ◽  
Fertilizer Rate ◽  
Stem Blight ◽  
Southern Highbush ◽  
Fertilizer Rates

The effects of fertilizer rate and composition on growth and fruiting of ‘Misty’ and ‘Star’ southern highbush blueberry were evaluated in a containerized production system using pine bark medium. Two fertilizer analyses (12N–1.8P–46.6K and 12N–5.2P–9.9K) and three fertilizer rates were used. Plant growth and fruiting were unaffected by fertilizer analysis. Growth and fruit yield of ‘Star’ increased linearly with increasing fertilizer rate. For ‘Misty’, plant growth and yield were reduced at the highest fertilizer rate as a result of a high incidence of blueberry stem blight associated with that treatment. Flower bud density was highest for the ‘Misty’ plants receiving the high fertilizer rate and this may have resulted in excessive fruit set leading to stress-induced blueberry stem blight. Optimum fertilizer rates for young southern highbush blueberry plants grown in containerized pine bark systems appear to be cultivar-specific and similar to fertilizer requirements in soil culture.

scholarly journals Botrytis Blossom Blight of Southern Highbush Blueberry

EDIS ◽  
1969 ◽  
Vol 2004 (9) ◽  
Author(s):  
Philip F. Harmon
Keyword(s):  
Plant Pathology ◽  
Information Search ◽  
Cooperative Extension Service ◽  
Extension Service ◽  
Publication Date ◽  
Highbush Blueberry ◽  
Original Publication ◽  
University Of Florida ◽  
Extension Agent ◽  
Southern Highbush

Information contained in this publication is intended to help blueberry growers in Florida identify and manage Botrytis blossom blight. For more information, search the EDIS website (http://edis.ifas.ufl.edu) or contact your local UF/IFAS Extension agent (http://ifas.ufl.edu/extension-offices-rec-maps.shtml). This document is PP198, one of a series of the Plant Pathology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date April 2004.  PP198/PP119: Botrytis Blossom Blight of Southern Highbush Blueberry (ufl.edu)

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