scholarly journals Diaprepes Root Weevil on Southern Highbush Blueberry in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (3) ◽  
Author(s):  
Douglas A. Phillips ◽  
Oscar E. Liburd ◽  
Larry W. Duncan
Keyword(s):  
Highbush Blueberry ◽  
Diaprepes Abbreviatus ◽  
Central Florida ◽  
Fact Sheet ◽  
Citrus Root ◽  
Southern Highbush ◽  
And Control ◽  
Citrus Trees

Citrus root weevil, Diaprepes abbreviatus (Linnaeus) is a destructive pest on citrus trees. It is now becoming a significant pest on blueberry in central Florida, at times causing major damage to blueberry bushes that are more than two years old. This 3-page fact sheet written by Douglas A. Phillips, Oscar E. Liburd, and Larry W. Duncan and published by the UF/IFAS Entomology and Nematology Department will educate blueberry growers on how to monitor, identify, and control citrus root weevil. http://edis.ifas.ufl.edu/in1241

scholarly journals Protected Culture for Vegetable and Small Fruit Crops: Southern Highbush Blueberry Cultivars under High Tunnels

EDIS ◽  
2013 ◽  
Vol 2013 (10) ◽  
Author(s):  
Bielinski M. Santos ◽  
Teresa P. Salame-Donoso
Keyword(s):  
Fruit Weight ◽  
Highbush Blueberry ◽  
Fruit Crops ◽  
North Central ◽  
Central Florida ◽  
Fact Sheet ◽  
Small Fruit ◽  
High Tunnels ◽  
Southern Highbush ◽  
Freeze Protection

High tunnels have been proposed as an alternative for freeze protection and to increase fruit earliness of southern highbush blueberry. But there is no information about the effect of this type of structure on southern highbush blueberry fruit earliness under subtropical Florida conditions. This 3-page fact sheet summarizes the results of 2-year study in a commercial southern highbush blueberry farm in North Central Florida to compare early fruit weight in high tunnels to that of open fields. This 3-page fact sheet was written by Bielinski M. Santos and Teresa P. Salame-Donoso, and published by the UF Department of Horticultural Sciences, July 2013. http://edis.ifas.ufl.edu/hs1226

scholarly journals Blueberry Gall Midge on Southern Highbush Blueberry in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (2) ◽  
Author(s):  
Oscar E. Liburd ◽  
Douglas A. Phillips
Keyword(s):  
United States ◽  
North America ◽  
Gall Midge ◽  
The United States ◽  
Highbush Blueberry ◽  
Feeding Damage ◽  
Fact Sheet ◽  
Southern Highbush ◽  
Blueberry Gall Midge ◽  
And Control

Blueberry gall midge is a small fly native to North America that feeds on blueberries and cranberries. It can be found throughout the United States, including Florida, where its larvae feed on southern highbush blueberry and rabbiteye floral and vegetative buds. Reports of blueberry gall midge damage on southern highbush blueberry in Florida have become more common in recent years, in some cases significantly impacting yield where there was severe feeding damage to floral buds. This 3-page fact sheet written by Oscar Liburd and Doug Phillips and published by the UF/IFAS Department of Entomology and Nematology will inform growers how to scout for, identify, and control blueberry gall midge. http://edis.ifas.ufl.edu/in1239

scholarly journals Potential Impact of Populations Drift on Botrytis Occurrence and Resistance to Multi- and Single-Site Fungicides in Florida Southern Highbush Blueberry Fields

Plant Disease ◽  
2018 ◽  
Vol 102 (11) ◽  
pp. 2142-2148 ◽  
Author(s):  
A. Amiri ◽  
A. I. Zuniga ◽  
N. A. Peres
Keyword(s):  
Germ Tube ◽  
Gray Mold ◽  
Single Site ◽  
Fruit Rot ◽  
Highbush Blueberry ◽  
Thiophanate Methyl ◽  
Central Florida ◽  
Potential Population ◽  
Potential Impact ◽  
Southern Highbush

Incidence of blossom blight and Botrytis fruit rot (BFR), caused by Botrytis cinerea, on two southern highbush blueberry cultivars was evaluated in several blueberry fields grown in the vicinity (BB-Str(+)) or not (BB-Str(−)) of strawberry fields in central Florida. Blossom blight and BFR incidence were higher in BB-Str(+) fields in 2014 and significantly higher in 2015 compared to BB-Str(−) fields. In total, 613 B. cinerea isolates (i.e., 181 and 432 isolates from BB-Str(−) and BB-Str(+) fields, respectively) were collected. The isolates were evaluated for sensitivity to eight single-site and one multisite fungicides using a spore germination and a germ tube elongation assay. Overall, 5, 15, 24, 28, 54, and 93% of isolates collected from BB-Str(−) were resistant to penthiopyrad, cyprodinil, boscalid, fenhexamid, pyraclostrobin, and thiophanate-methyl, respectively. Respective resistance frequencies in BB-Str(+) isolates were 10, 30, 65, 66, 89, and 99%. Resistance frequencies for all fungicides were always higher in BB-Str(+) fields compared to BB-Str(−) fields. Isolates exhibiting resistance to six or five fungicides simultaneously were predominant (50 to 70%) in blueberry fields regardless if they were grown in the vicinity of strawberry fields or not. Among 308 and 305 B. cinerea isolates tested in 2014 and 2015, 41.8 and 47.1%, respectively, showed reduced sensitivity to the multisite fungicide captan. The lower label rate of captan applied preventively did not control isolates with reduced sensitivity on detached blueberry fruit. These findings suggest a potential population flow between strawberry and blueberry fields that may impact blossom blight and gray mold development in blueberry fields. The relatively lower fungicide input applied to blueberry fields compared with strawberry fields seems to be sufficient to select for resistance and multiple-resistant phenotypes in B. cinerea populations in blueberry.

scholarly journals Screening for Susceptibility to Anthracnose Stem Lesions in Southern Highbush Blueberry

HortScience ◽  
2018 ◽  
Vol 53 (7) ◽  
pp. 920-924
Author(s):  
Douglas A. Phillips ◽  
Philip F. Harmon ◽  
James W. Olmstead ◽  
Natalia A. Peres ◽  
Patricio R. Munoz
Keyword(s):  
Vaccinium Corymbosum ◽  
South Florida ◽  
Highbush Blueberry ◽  
University Of Florida ◽  
Central Florida ◽  
Progress Curve ◽  
Spray Inoculation ◽  
Southern Highbush ◽  
Stem Lesions ◽  
The University

‘Flicker’ is a southern highbush blueberry (SHB, Vaccinium corymbosum) cultivar frequently selected by growers in Central and South Florida. In 2014, several growers in Central Florida experienced issues with anthracnose stem lesions and twig dieback on ‘Flicker’, resulting in a reduction in new plantings and the removal of many existing plantings. The objective of this study was to determine the level of anthracnose susceptibility of certain commercially available SHB cultivars, which information can be used to limit further use of susceptible cultivars in the University of Florida blueberry breeding program. The screening was performed using a spray inoculation of a virulent Colletotrichum gloeosporioides isolate onto whole V. corymbosum plants, followed by measurement of incidence and severity of disease over time. In repeated experiments, ‘Flicker’ and two other cultivars had a significantly higher mean number of lesions and area under the disease progress curve (AUDPC) than any other tested cultivar, and in both experiments, the observed lesions were similar in many respects to those previously reported on northern highbush blueberry (also V. corymbosum). Although the results of these experiments may ultimately indicate that Flicker has a unique genetic susceptibility to this form of anthracnose among SHB cultivars commercially grown in Florida, screening of additional cultivars must be performed for confirmation.

Hydrogen Cyanamide Increases Leafing and Reduces Fruit Development Period of Southern Highbush Blueberry

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 529c-529
Author(s):  
J.G. Williamson ◽  
B.E. Maust ◽  
R.L. Darnell
Keyword(s):  
Fruit Development ◽  
Fruit Size ◽  
Highbush Blueberry ◽  
Flower Bud ◽  
North Central ◽  
Hydrogen Cyanamide ◽  
Central Florida ◽  
Fruit Thinning ◽  
Fruit Maturity ◽  
Southern Highbush

Mature, field-grown `Misty' southern highbush blueberry plants were sprayed to drip with 0, 20.4, and 10.2 g·L–1 concentrations of hydrogen cyanamide in north-central Florida on 20 Dec. and 7 Jan. 1996–97. Plants were dormant and leafless, with slightly swollen flower buds, at the time of spray applications. All hydrogen cyanamide sprays increased the extent and earliness of vegetative budbreak and canopy establishment. The number of vegetative budbreaks per centimeter of shoot length increased linearly with increasing spray concentration of hydrogen cyanamide. Hydrogen cyanamide-treated fruit had greater average fresh weights and shorter average fruit development periods than non-treated fruit. On 15 Apr., 40% ti 60% of hydrogen cyanamide-treated fruit were ripe compared to about 10% of control fruit. Some flower bud damage and subsequent fruit thinning was observed from the 20.4 g·L–1 spray, especially at the later spray date. Hydrogen cyanamide shows potential for increasing early fruit maturity and fruit size of some southern highbush blueberry cultivars in Florida.

scholarly journals Limpograss: A Quick Reference

EDIS ◽  
2008 ◽  
Vol 2008 (3) ◽  
Author(s):  
Yoana C. Newman
Keyword(s):  
Weed Control ◽  
Management Practices ◽  
Perennial Grass ◽  
Warm Season ◽  
Central Florida ◽  
Fact Sheet ◽  
Broad Leaf ◽  
And Control

SS-AGR-302, a 3-page fact sheet by Yoana C. Newman, provides key data on this warm-season perennial grass used extensively for forage in south and central Florida, its origin, use, description, adaptation, management practices, fertilization, broad-leaf weed control, and pests and control. Includes references.  Published by the UF Department of Agronomy, March 2008.

scholarly journals ‘Emerald’ Southern Highbush Blueberry

HortScience ◽  
2008 ◽  
Vol 43 (5) ◽  
pp. 1606-1607 ◽  
Author(s):  
Paul M. Lyrene
Keyword(s):  
Large Firm ◽  
Good Survival ◽  
Highbush Blueberry ◽  
Central Florida ◽  
Southern Highbush ◽  
High Yields ◽  
Winter Chilling ◽  
Good Flavor

‘Emerald’ is a low-chill tetraploid southern highbush blueberry hybrid that is well adapted to northeast and central Florida and to other areas receiving similar winter chilling (100 to 400 h below 7 °C). Emerald produces a vigorous bush with stout, semierect canes. It has medium to good survival in the field in north Florida. In northeast Florida, ‘Emerald’ flowers from mid-January to mid-February and ripens from mid-April to mid-May. ‘Emerald’ is capable of producing high yields of berries that are large, firm, and medium-dark in color with a small, dry picking scar and good flavor.

scholarly journals Pollination Best Practices in Southern Highbush Blueberry in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Rachel Mallinger ◽  
Douglas A. Phillips
Keyword(s):  
Best Practices ◽  
Fruit Set ◽  
Highbush Blueberry ◽  
Fact Sheet ◽  
Pollinating Insects ◽  
Southern Highbush

Southern highbush blueberry is the primary blueberry species grown in Florida. It is dependent upon pollinating insects for adequate pollination and fruit. Some Florida growers have reported cases of low fruit set in recent years, in particular on the cultivars Meadowlark and Emerald, which may have been due in part to poor pollination. This 5-page fact sheet written by Rachel E. Mallinger and Douglas A. Phillips and published by the UF/IFAS Department of Entomology and Nematology will discuss blueberry pollinators, some causes of poor pollination, and current best practices to reduce the possibility of poor pollination of southern highbush blueberry. http://edis.ifas.ufl.edu/in1237

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