Role of organosilicone surfactant in apple scab control under scab conducive weather conditions
Fungicides of integrated fruit production (dithianon, captan, and diclofluanid) and an organosilicone surfactant were compared in spray schedules from green tip until summer in order to control apple scab caused by Venturia inaequalis and to evaluate their phytotoxicity on fruit. Sixteen sprays of 1...
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| Format: | Article |
| Language: | English |
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University of Debrecen
2008-05-01
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| Series: | International Journal of Horticultural Science |
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| Online Access: | https://ojs.lib.unideb.hu/IJHS/article/view/797 |
| _version_ | 1818824930580496384 |
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| author | I. J. Holb |
| author_facet | I. J. Holb |
| author_sort | I. J. Holb |
| collection | DOAJ |
| description | Fungicides of integrated fruit production (dithianon, captan, and diclofluanid) and an organosilicone surfactant were compared in spray schedules from green tip until summer in order to control apple scab caused by Venturia inaequalis and to evaluate their phytotoxicity on fruit. Sixteen sprays of 1.8 kg ha-1captan, 0.41 ha-1 dithianon, and 1.8 kg ha-1 diclolfluanid significantly (P=0.05) reduced the incidence of leaf or fruit scab compared to unsprayed products. All fungicides applied with organosilicone at 0.1% resulted in lower incidence of scab on young and older leaves as well as on harvested fruit, but these were not statistically always better than fungicides applied alone. In case of diclofluanid, the fungicide applied with organosilicone at 0.1% resulted in significantly lower (P = 0.001) incidence of scab on young and older leaves. Diclofluanid applied with organosilicone at 0.1% gave the best scab control on leaf and fruit. Treatments applied with fungicides alone had no significant effect on plant phytotoxicity compared to untreated control. All fungicides applied with organosilicone at 0.1% increased (P = 0.05) fruit damage compared to untreated control or fungicide applied alone, though these were not always significantly different. In case of percentage of fruit russet, treatment of dithianon 0.4 1/ha + 0.1% organosilicone significantly increased fruit russet, while fruit russet index significantly increased in the treatment of diclofluanid 1.8 kg/ha + 0.1% organosilicone compared to untreated control. In sum, application of surfactants can help to increase efficacy of scab fungicides; and consequently, to reduce the risk of fungus infection under high scab disease pressure. This fact may also be helpful in fungicide resistance management and reduced-spray programs with accurate scab warning systems. |
| first_indexed | 2024-12-19T00:03:42Z |
| format | Article |
| id | doaj.art-817da81b9f974e47bcbddbb087fb9b44 |
| institution | Directory Open Access Journal |
| issn | 1585-0404 2676-931X |
| language | English |
| last_indexed | 2024-12-19T00:03:42Z |
| publishDate | 2008-05-01 |
| publisher | University of Debrecen |
| record_format | Article |
| series | International Journal of Horticultural Science |
| spelling | doaj.art-817da81b9f974e47bcbddbb087fb9b442022-12-21T20:46:21ZengUniversity of DebrecenInternational Journal of Horticultural Science1585-04042676-931X2008-05-0114310.31421/IJHS/14/3/797Role of organosilicone surfactant in apple scab control under scab conducive weather conditionsI. J. Holb0apple scab, fruit russet, surfactant, organosilicone, integrated fruit production, phytotoxictyFungicides of integrated fruit production (dithianon, captan, and diclofluanid) and an organosilicone surfactant were compared in spray schedules from green tip until summer in order to control apple scab caused by Venturia inaequalis and to evaluate their phytotoxicity on fruit. Sixteen sprays of 1.8 kg ha-1captan, 0.41 ha-1 dithianon, and 1.8 kg ha-1 diclolfluanid significantly (P=0.05) reduced the incidence of leaf or fruit scab compared to unsprayed products. All fungicides applied with organosilicone at 0.1% resulted in lower incidence of scab on young and older leaves as well as on harvested fruit, but these were not statistically always better than fungicides applied alone. In case of diclofluanid, the fungicide applied with organosilicone at 0.1% resulted in significantly lower (P = 0.001) incidence of scab on young and older leaves. Diclofluanid applied with organosilicone at 0.1% gave the best scab control on leaf and fruit. Treatments applied with fungicides alone had no significant effect on plant phytotoxicity compared to untreated control. All fungicides applied with organosilicone at 0.1% increased (P = 0.05) fruit damage compared to untreated control or fungicide applied alone, though these were not always significantly different. In case of percentage of fruit russet, treatment of dithianon 0.4 1/ha + 0.1% organosilicone significantly increased fruit russet, while fruit russet index significantly increased in the treatment of diclofluanid 1.8 kg/ha + 0.1% organosilicone compared to untreated control. In sum, application of surfactants can help to increase efficacy of scab fungicides; and consequently, to reduce the risk of fungus infection under high scab disease pressure. This fact may also be helpful in fungicide resistance management and reduced-spray programs with accurate scab warning systems.https://ojs.lib.unideb.hu/IJHS/article/view/797apple scabfruit russetsurfactantorganosiliconeintegrated fruit productionphytotoxicty |
| spellingShingle | I. J. Holb Role of organosilicone surfactant in apple scab control under scab conducive weather conditions International Journal of Horticultural Science apple scab fruit russet surfactant organosilicone integrated fruit production phytotoxicty |
| title | Role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| title_full | Role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| title_fullStr | Role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| title_full_unstemmed | Role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| title_short | Role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| title_sort | role of organosilicone surfactant in apple scab control under scab conducive weather conditions |
| topic | apple scab fruit russet surfactant organosilicone integrated fruit production phytotoxicty |
| url | https://ojs.lib.unideb.hu/IJHS/article/view/797 |
| work_keys_str_mv | AT ijholb roleoforganosiliconesurfactantinapplescabcontrolunderscabconduciveweatherconditions |