scholarly journals Disease Susceptibility of Interspecific Cold-Hardy Grape Cultivars in Northeastern U.S.A

Horticulturae ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 216
Author(s):  
Ann L. Hazelrigg ◽  
Terence L. Bradshaw ◽  
Gabriella S. Maia
Keyword(s):  
Powdery Mildew ◽  
Disease Susceptibility ◽  
Production Systems ◽  
Fruit Rot ◽  
Black Rot ◽  
Moderate Disease ◽  
Bunch Rot ◽  
Cold Hardy ◽  
Cultivar Susceptibility ◽  
Grape Cultivars

Susceptibility to diseases of economically important grapes is critical to the evaluation of germplasm recommended for commercial production and for the development of sustainable production systems. In 2018–2019, the cold-hardy grape cultivars including ‘Brianna’, ‘Crimson Pearl’, ‘Itasca’, ‘Louise Swenson’, ‘Marechal Foch’, ‘Marquette’ ‘Petite Pearl’, ‘St. Pepin’, and ‘Verona’ were evaluated on non-treated vines for susceptibility to downy mildew, powdery mildew, black rot, anthracnose, Phomopsis leaf spot and fruit rot, and Botrytis bunch rot. No cultivars were consistently disease-free, and all exhibited some degree of black rot and powdery mildew infection. Relative susceptibility to disease was not consistent across both years, but ‘Brianna’ had greater incidence of black rot and ‘Louise Swenson’ showed lower incidence of powdery mildew in both years. The relatively new cultivars ‘Crimson Pearl’ and ‘Verona’ exhibited comparatively moderate disease susceptibility overall. Growers typically manage diseases with fungicides on commercial farms, so cultivar susceptibility is just one component of a sustainable pest management and production system.

scholarly journals Disease Susceptibility of Interspecific Cold-hardy Grape Cultivars in Northeastern U.S.A.

2021 ◽  
Author(s):  
Ann L Hazelrigg ◽  
Terence L Bradshaw ◽  
Gabriella S. Maia
Keyword(s):  
Powdery Mildew ◽  
Disease Susceptibility ◽  
Production Systems ◽  
Fruit Rot ◽  
Black Rot ◽  
Moderate Disease ◽  
Bunch Rot ◽  
Cold Hardy ◽  
Cultivar Susceptibility ◽  
Grape Cultivars

Susceptibility to economically-important diseases of grapes is critical to the evaluation of germplasm recommended for commercial production and for development of sustainable production systems. In 2018-2019, nine cold-hardy grape cultivars including ‘Brianna’, ‘Crimson Pearl’, ‘Itasca’, ‘Louise Swenson’, ‘Marechal Foch’, ‘Marquette’ ‘Petite Pearl’, ‘St. Pepin’, and ‘Verona’ were evaluated on non-treated vines for susceptibility to downy mildew, powdery mildew, black rot, anthracnose, Phomopsis leaf spot and fruit rot, and Botrytis bunch rot. No cultivars were consistently disease-free, and all exhibited some degree of black rot and powdery mildew infection. Relative susceptibility to disease was not consistent across both years, but ‘Brianna’ had greater incidence of black rot and ‘Louise Swenson’ showed lower incidence of powdery mildew in both years. The relatively new cultivars ‘Crimson Pearl’ and ‘Verona’ exhibited comparatively moderate disease susceptibility overall. Growers typically manage diseases with fungicides on commercial farms, so cultivar susceptibility is just one component of a sustainable pest management and production system.

scholarly journals Susceptibility of Cold-Climate Wine Grape Cultivars to Downy Mildew, Powdery Mildew, and Black Rot

Plant Disease ◽  
2017 ◽  
Vol 101 (7) ◽  
pp. 1077-1085 ◽  
Author(s):  
David S. Jones ◽  
Patricia S. McManus
Keyword(s):  
Powdery Mildew ◽  
Downy Mildew ◽  
Management Strategies ◽  
Plasmopara Viticola ◽  
Cold Climate ◽  
Black Rot ◽  
Wine Grape ◽  
Plant Host ◽  
Northern United States ◽  
Grape Cultivars

Lack of knowledge regarding the susceptibility of cold-climate hybrid wine grape cultivars may be leading to the overuse of fungicides and underutilization of plant host resistance to combat disease in the northern United States. To provide new insights on diseases of cold-climate cultivars and to update management recommendations, disease was evaluated in three vineyards containing eight cultivars that were not sprayed with fungicides in 2015 and 2016. Disease severity or incidence of downy mildew (Plasmopara viticola), powdery mildew (Erysiphe necator), and black rot (Guignardia bidwellii) were measured from bud break until 2 weeks after harvest. Cold-climate cultivars ranged widely in susceptibility to different diseases and, although several cultivars were relatively resistant to two diseases, no cultivar was highly resistant to all three diseases. Additionally, a difference between foliar and fruit susceptibility for all three diseases was noted in several cultivars. These data provide a foundation for developing low-spray and certified organic disease management strategies for cold-climate wine grape cultivars based on susceptibility to disease.

scholarly journals Mini munchers to control powdery mildew and botrytis bunch rot in grapes

2010 ◽  
Vol 63 ◽  
pp. 279-279
Author(s):  
K.S.H. Boyd-Wilson ◽  
S. Read ◽  
D.C. Mundy
Keyword(s):  
New Zealand ◽  
Disease Management ◽  
Powdery Mildew ◽  
Production Systems ◽  
Growing Season ◽  
Wine Industry ◽  
Wine Production ◽  
Apple Leaves ◽  
Bunch Rot ◽  
Organic Wine

The use of mycophagous (fungal feeding) invertebrates has potential to contribute to disease management in both organic and conventional wine production systems in New Zealand The New Zealand wine industry is actively working towards producing ultralow residue wines This involves removing all late season botrytis fungicide sprays from the vineyard spray programme In organic wine production systems in New Zealand the only products available to control powdery mildew and botrytis bunch rot are protectants In both these systems when fungicides are not available mycophagous invertebrates may reduce the amount of inoculum available to cause disease A survey of leaf material in 19 vineyards in Canterbury and Marlborough over the 20082009 growing season identified populations of beetles in two vineyards in sufficient numbers to justify further research In the laboratory fieldcollected beetles that were starved for 2 days fed on spores of Botrytis cinerea (botrytis bunch rot) growing on blackcurrant flowers Podosphaerea leucotricha (apple powdery mildew) on apple leaves and Erysiphe necator (grape powdery mildew) on grape leaves Beetles were identified as Aridius bifaciatus (Reitter) A nodifer (Westwood) and Cortinicara hirtalis (Broun)

scholarly journals Comparison of Epidemics of Botrytis Fruit Rot and Powdery Mildew of Strawberry in Large Plastic Tunnel and Field Production Systems

Plant Disease ◽  
2001 ◽  
Vol 85 (8) ◽  
pp. 901-909 ◽  
Author(s):  
C. L. Xiao ◽  
C. K. Chandler ◽  
J. F. Price ◽  
J. R. Duval ◽  
J. C. Mertely ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Production Systems ◽  
Fruit Rot ◽  
Leaf Wetness ◽  
Susceptible Cultivar ◽  
The Mean ◽  
Sphaerotheca Macularis ◽  
Field Plots ◽  
Field Production ◽  
Plot Design

Epidemics of Botrytis fruit rot (Botrytis cinerea) and powdery mildew (Sphaerotheca macularis f. sp. fragariae) in annual strawberry were compared in large plastic tunnel and field production systems during the 1998-99 and 1999-2000 seasons. Treatments were factorial combinations of two main plots (field and tunnel) and four subplots, including combinations of two cultivars (Camarosa and Sweet Charlie) and two captan schedules arranged in a split-plot design with three replications. The mean incidence of Botrytis fruit rot was 88 to 94% lower in tunnels than in the field. The incidence of Botrytis fruit rot for the untreated control in tunnels was less than 2%, which was 89% lower than that of the 7-day captan schedule in the field. This indicates that Botrytis fruit rot can be controlled effectively without fungicides in a tunnel cultural system. Powdery mildew was severe on susceptible cultivar Camarosa in tunnels. Early season yields of cultivar Sweet Charlie were significantly higher in tunnels than in the field. Shorter periods of leaf wetness and higher temperatures in tunnels may have contributed to a lower incidence of Botrytis fruit rot and a higher incidence of powdery mildew on fruit in tunnels compared with open field plots.

scholarly journals Effect of Compost Amendments on Disease Severity and Yield of Tomato in Conventional and Organic Production Systems

Plant Disease ◽  
2002 ◽  
Vol 86 (2) ◽  
pp. 156-161 ◽  
Author(s):  
P. A. Abbasi ◽  
J. Al-Dahmani ◽  
F. Sahin ◽  
H. A. J. Hoitink ◽  
S. A. Miller
Keyword(s):  
Disease Severity ◽  
Production Systems ◽  
Disease Incidence ◽  
Organic Production ◽  
Fruit Rot ◽  
High Rate ◽  
Bacterial Spot ◽  
Marketable Yield ◽  
Tomato Production ◽  
Compost Amendments

Field trials were conducted over 2 years to assess the effects of compost amendments on disease development in organic and conventional processing tomato (Lycopersicon esculentum L.) production systems. The incidence of anthracnose fruit rot was reduced in organic tomato plots amended with a high rate of composted cannery wastes compared with the incidence in nonamended control plots in 1998 when disease incidence was high. Marketable yield was increased by 33% in compost-amended organic plots. Plots amended with a high compost rate had more ripe fruit than the nonamended control. The incidence of anthracnose and of total disease on fruit was less on the cultivar OH 8245 than on Peto 696. Total fruit yield of OH 8245 but not Peto 696 in organic plots was increased by amendment with composted cannery wastes. In conventional tomato production, composted yard wastes increased disease severity on foliage both years but reduced bacterial spot incidence on fruit in 1997, when disease pressure was high. The incidence of anthracnose was not affected by composted yard wastes. Marketable and total fruit yields of Peto 696 were not increased in compost-amended conventional plots. The plant activator Actigard reduced foliar disease severity and the incidence of bacterial spot and anthracnose on fruit, while increasing yield of marketable fruit.

scholarly journals Novel management strategy to minimize the growing threat of fruit rot and powdery mildew diseases of chilli (Capsicum annuum) in India

2020 ◽  
Vol 9 (6) ◽  
pp. 2250-2255
Author(s):  
Abdul Kareem M ◽  
TB Allolli ◽  
Krishna Kurubetta ◽  
PS Ajjapalavar ◽  
MH Tatagar ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Capsicum Annuum ◽  
Management Strategy ◽  
Fruit Rot

scholarly journals Effect of Fungicide Applications Scheduled to Control Gummy Stem Blight on Yield and Quality of Watermelon Fruit

Plant Disease ◽  
2001 ◽  
Vol 85 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Anthony P. Keinath
Keyword(s):  
Disease Severity ◽  
Fruit Weight ◽  
Fruit Rot ◽  
Soluble Solids ◽  
Black Rot ◽  
Soluble Solids Content ◽  
Stem Blight ◽  
Gummy Stem Blight ◽  
Yield And Quality ◽  
Solids Content

Yield and quality reductions in watermelon infected with Didymella bryoniae may be attributed to reduced number or weight of fruit, sunburned fruit, fruit rot, or low sugar content due to gummy stem blight on foliage and black rot on fruit. Number, weight, soluble solids content, and external appearance of fruit were determined in four experiments conducted in fall 1996 and 1997 and spring 1997 and 1998. Severity of gummy stem blight was varied by applying no fungicide, mancozeb, or chlorothalonil according to different schedules. In the fall, when disease severity was high, total fruit weight, percent marketable fruit, and soluble solids content were lower and percent fruit with black rot was higher in nonsprayed than in sprayed treatments. Fungicide applications did not affect total fruit weight, soluble solids content, or black rot in the spring, when disease severity was moderate to low. Percent sunburned fruit was greater in treatments sprayed every 14 days than in those sprayed weekly. In fall experiments, the number of healthy, unblemished fruit increased linearly as the number of fungicide applications was increased from zero to nine per season. Yield losses in watermelon to gummy stem blight and black rot resulted primarily from a reduction in total fruit weight and an increase in number of diseased and sunburned fruit.

scholarly journals Fungicides for control of black spot and powdery mildew in organic apple production systems

1991 ◽  
Vol 44 ◽  
pp. 86-90 ◽  
Author(s):  
R.M. Beresford ◽  
P.A.G. Elmer ◽  
M. Spink ◽  
R.T. Alexander ◽  
M.J. Daly
Keyword(s):  
Powdery Mildew ◽  
Production Systems ◽  
Black Spot ◽  
Apple Production

scholarly journals Relative Susceptibility of Selected Apple Cultivars to Fruit Rot Caused by Botryosphaeria obtusa

HortScience ◽  
2004 ◽  
Vol 39 (2) ◽  
pp. 303-306 ◽  
Author(s):  
Alan R. Biggs ◽  
Stephen S. Miller
Keyword(s):  
Field Data ◽  
Fruit Rot ◽  
Black Rot ◽  
Current Standard ◽  
Relative Susceptibility ◽  
Growing Seasons ◽  
Golden Delicious ◽  
Botryosphaeria Obtusa ◽  
Apple Cultivars ◽  
Lesion Growth

Twenty-three apple (Malus ×domestica) cultivars were tested in the field and laboratory for their relative susceptibility to the black rot pathogen, Botryosphaeria obtusa. Wounded fruit were inoculated in the field at 2 to 3 weeks preharvest with mycelium from 14- to 21-day-old cultures. In the laboratory, detached fruit were inoculated similarly. Fruit were rated for relative susceptibility to the fungus by determining disease severity of attached fruit in the field based on lesion growth (mm/degree-day) and detached fruit in laboratory inoculations of wounded fruit (mean lesion diameter after 4 days). Based on the laboratory and field data from two growing seasons, cultivars were classified into three relative susceptibility groups—most susceptible: `Orin', `Pristine', and Sunrise'; moderately susceptible: `Suncrisp', `Ginger Gold', `Senshu', `Honeycrisp', `PioneerMac', `Fortune', NY75414, `Arlet', `Golden Supreme', `Shizuka', `Cameo', `Sansa', and `Yataka'; and least susceptible: `Creston', `Golden Delicious', `Enterprise', `Gala Supreme', `Braeburn', `GoldRush', and `Fuji'. Compared to previous cultivar rankings, the results of the present study indicate that no new apple cultivars from the first NE-183 planting show greater resistance to Botryosphaeria obtusa than current standard cultivars.

Sign in / Sign up

Export Citation Format

Share Document