The Control of Bacterial Canker and Leaf-Spot in Sweet Cherry

1945 ◽  
Vol 21 (1) ◽  
pp. 155-163 ◽  
Author(s):  
H. B. S. Montgomery ◽  
M. H. Moore
Keyword(s):  
Leaf Spot ◽  
Sweet Cherry ◽  
Bacterial Canker

scholarly journals Genetic diversity of Pseudomonas syringae pv. syringae isolated from sweet cherry in southern and northern regions in Serbia

Genetika ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 247-262
Author(s):  
Renata Ilicic ◽  
Tatjana Popovic ◽  
Sanja Markovic ◽  
Aleksandra Jelusic ◽  
Ferenc Bagi ◽  
...  
Keyword(s):  
Pseudomonas Syringae ◽  
Leaf Spot ◽  
Sweet Cherry ◽  
Sour Cherry ◽  
Housekeeping Genes ◽  
Northern Region ◽  
Bacterial Canker ◽  
Fluorescent Pseudomonas ◽  
Planting Material ◽  
Northern Regions

Bacterial canker and leaf spot caused by plant pathogenic bacterium Pseudomonas is among the most destructive cherry diseases worldwide. Nowadays in Serbia, sweet cherry production significantly increased and the new plantations, mainly grown from imported planting material are being raised every year. During spring, 2018 and 2019, occurrence of bacterial canker and leaf spot symptoms was observed on a newly planted sweet cherry plantations in two localities, Zitoradja (Southern region) and Karavukovo (Northern region-Vojvodina). Typical P. syringae colonies were isolated on Nutrient Sucrose Agar supplemented with 5% sucrose (NSA). A total of fifteen isolates were selected and identified. Results of the LOPAT test (+---+) determined them to belong to fluorescent Pseudomonas Group Ia, while results of G+A+T-Ta- tests indicate presence of Pseudomonas syringae pv. syringae. Pathogenicity was confirmed on immature sweet and sour cherry fruitlets by forming of black, sunken lesions for all tested isolates. Genes syrB and syrD were successfully detected in all tested isolates. DNA sequencing using gapA, gltA, gyrB and rpoD housekeeping genes determined tested isolates to belong to P. s. pv. syringae using the National Center for Biotechnology Information (NCBI) nucleotide BLAST. The Serbian isolates shared 99.47% to 100% (Zitoradja) and 99.38% to 100% (Karavukovo) identity with bacterium P. s. pv. syringae. Phylogenetic analysis grouped isolates from Zitoradja in one tree cluster, separate from the Karavukovo isolates, indicating presence of two genetically diverse groups of causal pathogen P. s. pv. syringae, obtained from two geographically distinct localities in Serbia. Phylogeographic analysis grouped isolates from Zitoradja in multilocus haplotype coded as REz and isolates originated from Karavukovo in multilocus haplotype coded as REk. Considering that during last few years P. syringae continuously occurs mainly in young sweet cherry plantations, where imported material is used for raising, health status check is recommended to be included as obligatory measure when nursery material is used from import.

BACTERIAL CANKER OF SWEET CHERRY IN THE NIAGARA PENINSULA OF ONTARIO: PSEUDOMONAS SPECIES INVOLVED AND CULTIVAR SUSCEPTIBILITIES

1978 ◽  
Vol 58 (2) ◽  
pp. 363-369 ◽  
Author(s):  
WAYNE R. ALLEN ◽  
VICTOR A. DIRKS
Keyword(s):  
Sweet Cherry ◽  
Bacterial Species ◽  
Bacterial Canker ◽  
Biochemical Tests ◽  
Comparative Tests ◽  
Breeding For Resistance ◽  
Sweet Cherries ◽  
Pseudomonas Species ◽  
Pathogenicity Tests ◽  
Sweet Cherry Cultivars

Bacterial canker of sweet cherries in the Niagara Peninsula of Ontario is caused by at least two species or physiotypes of Pseudomonas bacteria. Biochemical tests indicated that the species are similar to English isolates of P. morsprunorum Wormald and P. syringae van Hall. Pathogenicity tests on nine sweet cherry cultivars and on seedlings of apple, pear, peach and mahaleb and mazzard cherry indicated that Ontario P. morsprunorum and P. syringae isolates are pathogenically distinct. Comparative tests with English and Ontario isolates indicated close pathogenic similarities among isolates of P. morsprunorum, whereas isolates of P. syringae appeared to be distinct races. Susceptibility trials with sweet cherry indicated that Ontario grown cultivars are sufficiently sensitive to both bacterial species to consider the disease a serious problem in cherry production. Moreover, the existence of at least two pseudomonas species in Ontario with distinct pathogenicity patterns in sweet cherry indicates that breeding for resistance will be a difficult task.

scholarly journals Bacterial Canker of Sweet Cherry (Prunus avium L.) Caused by Pseudomonas syringae pv. morsprunorum

2005 ◽  
Vol 11 (1) ◽  
pp. 80-84
Author(s):  
Gyoung-Hee Kim ◽  
Ill-Sup Nou ◽  
Jae-Seoun Hur ◽  
Seung-Don Lee ◽  
Young-Jin Koh
Keyword(s):  
Pseudomonas Syringae ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Bacterial Canker ◽  
Prunus Avium L

scholarly journals Evaluation of bacteriophages in the biocontrol of Pseudomonas syringae pv. syringae isolated from cankers on sweet cherry (Prunus avium L.) in Turkey

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Mustafa Akbaba ◽  
Hatice Ozaktan
Keyword(s):  
Pseudomonas Syringae ◽  
Pathogenic Bacteria ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Bacterial Canker ◽  
Productivity Losses ◽  
Pathogenicity Tests ◽  
Phenotypic Tests

Abstract Background Bacterial canker and subsequent gummosis are caused by multiple pathogens and lead to significant yield and productivity losses in sweet cherry cultivation in Turkey. This study identified that Pseudomonas syringae pathovars were responsible for bacterial canker on sweet cherry orchards by using classical and molecular methods and evaluated the biocontrol effects of bacteriophages against P. syringae pv. syringae. Results Pathogenic bacteria were isolated from samples taken from plants showing symptoms of bacterial canker in cherry orchards located in İzmir and Manisa provinces. Specific pathogens were identified using pathogenicity, phenotypic tests, and simplex PCR. Bacteriophages effective against P. syringae strains were isolated from soil contaminated with pathogens identified in the diseased orchards using an optimized isolation protocol. The biocontrol activity of bacteriophage isolates against P. syringae pv. syringae was tested in vitro and in vivo. The results of pathogenicity tests on immature sweet cherry fruits and micropropagated cherry plantlets revealed 10 pathogenic bacteria isolates from 44 plant samples taken from sweet cherry orchards showing symptoms of bacterial canker. Conclusions Ten isolates were identified as Pseudomonas syringae pv. syringae. Nine different pure bacteriophage isolates were effective. The results indicated that bacteriophage isolates may demonstrate variable reactivity against P. syringae pathovars.

Aetiology of peach and sweet cherry leaf spot and twig canker in Montenegro

2021 ◽  
pp. 319-326
Author(s):  
T. Popović ◽  
J. Menković ◽  
A. Prokić ◽  
A. Obradović
Keyword(s):  
Leaf Spot ◽  
Sweet Cherry ◽  
Cherry Leaf Spot

THE USE OF RAPESEED OIL TO REDUCE PREMATURE DEFOLIATION IN SWEET CHERRY SPRAYED WITH BORDEAUX MIXTURE FOR CONTROL OF BACTERIAL CANKER

1979 ◽  
Vol 59 (2) ◽  
pp. 487-489 ◽  
Author(s):  
WAYNE R. ALLEN ◽  
V. A. DIRKS
Keyword(s):  
Vegetable Oils ◽  
Rapeseed Oil ◽  
Sweet Cherry ◽  
Bordeaux Mixture ◽  
Bacterial Canker ◽  
Long Term Effects ◽  
Leaf Drop ◽  
Cherry Trees

Premature defoliation in sweet cherry trees sprayed with Bordeaux mixture for bacterial canker control was reduced by amending sprays with rapeseed oil. The time of 50% leaf drop was delayed with amended sprays by 10–14 days on the cultivars Venus, Vista, and Hedelfingen. Vegetable oils similar to rapeseed oil are recommended for use with Bordeaux mixture to prevent possible long-term effects on growth and winter injury resistance due to premature defoliation.

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