Combinations of treatments to replace the use of conventional fungicides for the commercial control of postharvest diseases of citrus fruit

2010 ◽  
Vol 6 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Nancy M Cunningham
Keyword(s):  
Citrus Fruit ◽  
Postharvest Diseases

scholarly journals Identification of Lasiodiplodia pseudotheobromae Causing Fruit Rot of Citrus in China

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 202
Author(s):  
Jianghua Chen ◽  
Zihang Zhu ◽  
Yanping Fu ◽  
Jiasen Cheng ◽  
Jiatao Xie ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Elongation Factor ◽  
Morphological Characteristics ◽  
Citrus Fruit ◽  
Economic Loss ◽  
Fruit Rot ◽  
Post Inoculation ◽  
Citrus Reticulata ◽  
Postharvest Diseases ◽  
Citrus Reticulata Blanco

Considering the huge economic loss caused by postharvest diseases, the identification and prevention of citrus postharvest diseases is vital to the citrus industry. In 2018, 16 decayed citrus fruit from four citrus varieties—Satsuma mandarin (Citrus unshiu), Ponkan (Citrus reticulata Blanco cv. Ponkan), Nanfeng mandarin (Citrus reticulata cv. nanfengmiju), and Sugar orange (Citrus reticulata Blanco)—showing soft rot and sogginess on their surfaces and covered with white mycelia were collected from storage rooms in seven provinces. The pathogens were isolated and the pathogenicity of the isolates was tested. The fungal strains were identified as Lasiodiplodia pseudotheobromae based on their morphological characteristics and phylogenetic analyses using the internal transcribed spacer regions (ITS), translation elongation factor 1-α gene (TEF), and beta-tubulin (TUB) gene sequences. The strains could infect wounded citrus fruit and cause decay within two days post inoculation, but could not infect unwounded fruit. To our knowledge, this is the first report of citrus fruit decay caused by L. pseudotheobromae in China.

Control of postharvest diseases on citrus fruit by preharvest application of the biocontrol agent Pantoea agglomerans CPA-2

2008 ◽  
Vol 49 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Teresa Paula Cañamás ◽  
Immaculada Viñas ◽  
Josep Usall ◽  
Carla Casals ◽  
Cristina Solsona ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Citrus Fruit ◽  
Pantoea Agglomerans ◽  
Postharvest Diseases

Pilot Testing of Pichia guilliermondii: A Biocontrol Agent of Postharvest Diseases of Citrus Fruit

1993 ◽  
Vol 3 (1) ◽  
pp. 47-52 ◽  
Author(s):  
S. Droby ◽  
R. Hofstein ◽  
C.L. Wilson ◽  
M. Wisniewski ◽  
B. Fridlender ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Citrus Fruit ◽  
Postharvest Diseases ◽  
Pichia Guilliermondii ◽  
Pilot Testing

scholarly journals Application of Candida saitoana and Glycolchitosan for the Control of Postharvest Diseases of Apple and Citrus Fruit Under Semi-Commercial Conditions

Plant Disease ◽  
2000 ◽  
Vol 84 (3) ◽  
pp. 243-248 ◽  
Author(s):  
Ahmed El-Ghaouth ◽  
Joseph L. Smilanick ◽  
G. Eldon Brown ◽  
Antonio Ippolito ◽  
Michael Wisniewski ◽  
...  
Keyword(s):  
Control Level ◽  
Citrus Fruit ◽  
Apple Cultivar ◽  
Postharvest Diseases ◽  
Early Season ◽  
Bioactive Coating ◽  
Washington Navel ◽  
Golden Delicious

The efficacy of the combination of Candida saitoana with 0.2% glycolchitosan (the bioactive coating) as a biocontrol treatment of postharvest diseases of apple and citrus fruit was evaluated in tests with natural inoculations that simulated commercial packinghouse conditions. The growth of C. saitoana in apple wounds and on fruit surfaces was not affected by glycolchitosan. The bioactive coating was more effective in controlling decay of several cultivars of apples (Red Delicious, Rome, Golden Delicious, and Empire) than either C. saitoana or 0.2% glycolchitosan alone. Depending on the apple cultivar used, the bioactive coating was comparable or superior to thiabendazole in reducing decay. The bioactive coating was also superior to C. saitoana in controlling decay of oranges (cvs. Washington navel, Valencia, Pineapple, and Hamlin) and cv. Eureka lemons, and the control level was equivalent to that with imazalil. The bioactive coating and imazalil treatments offered consistent control of decay on Washington navel oranges and Eureka lemons in early and late seasons, while C. saitoana or 0.2% glycolchitosan were most effective on early-season fruit. The combination of C. saitoana with 0.2% glycolchitosan also reduced the incidence of stem-end rot of cv. Valencia oranges, but control was less effective than treatment with imazalil.

Pre- and postharvest applications of a pomegranate peel extract to control citrus fruit decay during storage and shelf life

Plant Disease ◽  
2020 ◽  
Author(s):  
Sonia Pangallo ◽  
Maria Giulia Li Destri Nicosia ◽  
Silvia Scibetta ◽  
Maria Concetta Strano ◽  
Santa Olga Cacciola ◽  
...  
Keyword(s):  
Shelf Life ◽  
Citrus Fruit ◽  
Alternative Methods ◽  
Postharvest Diseases ◽  
Pomegranate Peel ◽  
Fruit Species ◽  
Postharvest Rot ◽  
Pomegranate Peel Extract ◽  
High Level ◽  
Peel Extract

Green and blue molds are the most important postharvest diseases affecting citrus in storage. These diseases are commonly controlled with fungicides, but legislative restrictions, consumer concerns and the development of resistant strains of the pathogens have increasingly led to the search for alternative methods of control. A pomegranate peel extract (PGE) was very effective in controlling Valencia orange and clementine postharvest rot under commercial conditions. After cold storage and 7 days of shelf life, the incidence of decay on oranges sprayed before harvest with PGE at 12, 6, and 3 g/l was reduced by 78.9, 76.0, and 64.6%, respectively. Similarly, postharvest dipping treatments with PGE reduced rot by 90.2, 84.3, and 77.6%, respectively. Comparable levels of protection were also achieved on clementines. On both, oranges and clementines, the extract provided a significantly higher level of protection compared to Imazalil (IMZ), a fungicide commonly used for postharvest treatments. The high level of efficacy and the consistence of results on different fruit species (clementines and oranges) and with different application methods (pre- and postharvest) was evidence of reliability and flexibility. PGE also showed a strong antimicrobial activity against fungi and bacteria, suggesting its possible use as sanitizers to reduce the microbial contamination of recirculated water in packinghouses. The results of the present study encourage the integration of conventional chemical fungicides and sanitizers with PGE to control citrus postharvest rot.

Control of postharvest diseases on citrus fruit by preharvest applications of biocontrol agent Pantoea agglomerans CPA-2

2008 ◽  
Vol 49 (1) ◽  
pp. 96-106 ◽  
Author(s):  
Teresa P. Cañamás ◽  
Immaculada Viñas ◽  
Josep Usall ◽  
Rosario Torres ◽  
Marina Anguera ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Citrus Fruit ◽  
Pantoea Agglomerans ◽  
Postharvest Diseases

Activity of salts incorporated in wax in controlling postharvest diseases of citrus fruit

2012 ◽  
Vol 65 ◽  
pp. 39-43 ◽  
Author(s):  
Khamis Youssef ◽  
Angela Ligorio ◽  
Franco Nigro ◽  
Antonio Ippolito
Keyword(s):  
Citrus Fruit ◽  
Postharvest Diseases

scholarly journals Assessing the Efficacy of Preharvest Fungicide Applications to Control Postharvest Diseases of Florida Citrus

2004 ◽  
Vol 14 (1) ◽  
pp. 58-62 ◽  
Author(s):  
Mark A. Ritenour ◽  
Robert R. Pelosi ◽  
Michael S. Burton ◽  
Eddie W. Stover ◽  
Huating Dou ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Colletotrichum Gloeosporioides ◽  
Citrus Fruit ◽  
Phosphorous Acid ◽  
Postharvest Diseases ◽  
Mature Fruit ◽  
Thiophanate Methyl ◽  
Postharvest Decay ◽  
Florida Citrus

Studies were conducted between November 1999 and April 2003 to evaluate the effectiveness of compounds applied preharvest for reducing postharvest decay on many types of fresh citrus (Citrus spp.) fruit. Commercially mature fruit were harvested two different times after the compounds were applied, degreened when necessary, washed, waxed (without fungicide), and then stored at 50 °F (10.0 °C) with 90% relative humidity. Compared to control (unsprayed) fruit, preharvest application of benomyl or thiophanate-methyl resulted in significantly (P < 0.05) less decay of citrus fruit after storage in nine out of ten experiments, often reducing decay by about half. In one experiment, pyraclostrobin and phosphorous acid also significantly decreased total decay by 29% and 36%, respectively, after storage compared to the control. Only benomyl and thiophanate-methyl significantly reduced stem-end rot (SER; primarily Diplodia natalensis or Phomopsis citri) after storage, with an average of 65% less decay compared to the control. Though benomyl significantly reduced anthracnose (Colletotrichum gloeosporioides) in two of four tests with substantial (>20%) infection and phosphorous acid significantly reduced it once, thiophanate-methyl did not significantly reduce the incidence of anthracnose postharvest. The data suggests that preharvest application of thiophanate-methyl may reduce postharvest SER and total decay similar to preharvest benomyl treatments.

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