Research Articles (Plant Pathology)
Recent Submissions
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Assessing genotype-by-environment interactions in aspergillus ear rot and pre-harvest aflatoxin accumulation in maize inbred lines
(MDPI, 2017)Aspergillus flavus, causal agent of the Aspergillus ear rot (AER) of maize, also produces aflatoxins that cause aflatoxicosis in humans and livestock. Ten maize inbred lines were evaluated in replicated trials in two ... -
The distribution and host range of the banana fusarium wilt fungus, fusarium oxysporum f. sp. cubense , in Asia
(Public Library of Science, 2017)Fusarium oxysporum formae specialis cubense (Foc) is a soil-borne fungus that causes Fusarium wilt, which is considered to be the most destructive disease of bananas. The fungus is believed to have evolved with its host ... -
Use of gamma irradiation for control of postharvest botrytis cinerea bunch rot of table grapes in cold storage
(South African Society for Enology and Viticulture, 1991)The feasibility of employing gamma irradiation for the control of postharvest Botrytis bunch rot of table grapes in cold storage was studied. Table grape cultivars from commercial vineyards in the Paarl and Hex River Valley ... -
Application of fungicides against postharvest botrytis bunch rot of table grapes in the Western Cape
(South African Society for Enology and Viticulture, 1994)Fungicide programmes for the control of postharvest Botrytis bunch rot on table grapes were evaluated in six trials from 1984/85 to 1991/92 in the Western Cape. The study demonstrated the ineffectiveness of dicarboximide ... -
Colonization of table grape bunches by alternaria alternata and rot of cold-stored grapes
(South African Society for Enology and Viticulture, 1994)Assessment of latent Alternaria alternata infections in table grapes indicated that infections occurred in commercial vineyards during the entire period of bunch development. Mature bunches were asymptomatic despite high ... -
Infection of table grape bunches by alternaria alternata
(South African Society for Enology and Viticulture, 1995)Infection of table grape bunches by Alternaria alternaJa was investigated by light, fluorescence and scanning electron microscopy. Conidia in 20-μ1 drops of spore suspension germinated readily on the fruit surface and ... -
Frequency of dicarboximide resistant strains of botrytis cinerea in South African table grape vineyards and influence of spray schedules on resistant sub-populations
(South African Society for Enology and Viticulture, 1998)Between 1993 and 1995, 1139 isolates of Botrytis cinerea were collected from table grape vineyards in the Western and Northern Cape provinces and tested for sensitivity to dicarboximides (vinclozolin) and benzimidazoles ... -
In vitro screening of fungicides against phomopsis viticola and diaporthe perjuncta
(South African Society for Enology and Viticulture, 2000)Phomopsis viticola is the cause of Phomopsis cane and leaf spot disease of grapevines, while Diaporthe perjuncta is associated with bud mortality. The efficacy of nine fungicides (azoxystrobin, flusilazole, folpet, fosetyl-Al ... -
Fungicide sensitivity of phaeomoniella chlamydospora, the causal organism of petri grapevine decline
(South African Society for Enology and Viticulture, 2000)Twelve fungicides, benomyl, chlorothalonil, fenarimol, fosetyl-Al, iprodione, kresoxim-methyl, mancozeb, metalaxyl, prochloraz manganese chloride, quintozene, tebuconazole and thiram were screened in vitro for their ability ... -
Incomplete cross-resistance to folpet and iprodione in botrytis cinerea from grapevine in South Africa
(South African Society for Enology and Viticulture, 2001)The sensitivity to folpet of Botrytis cinerea isolates obtained from table grape vineyards in the Western Cape province of South Africa with a known history of dicarboximide (DC) resistance and high-schedule DC and folpet ... -
Resistance in uncinula necator to triazole fungicides in South African grapevines
(South African Society for Enology and Viticulture, 2000)The distribution of Uncinula necator variants resistant to triadimenol, penconazole and flusilazole were determined in vineyards with suspected resistance in the regions Tulbagh, Franschhoek, Stellenbosch, De Dooms, Riebeeck ... -
Cleistothecia and flag shoots : sources of primary inoculum for grape powdery mildew in the Western Cape Province, South Africa
(South African Society for Enology and Viticulture, 2000)Little is known about the mode of survival and sources of primary inoculum of Uncinula necator, the causal pathogen of grapevine powdery mildew, in vineyards in the Western Cape province. A study was therefore undertaken ... -
An overview of the biology, epidemiology and control of uncinula necator (powdery mildew) on grapevine, with reference to South Africa
(South African Society for Enology and Viticulture, 2001)Grape powdery mildew, caused by Uncinula necator, is the most widespread and destructive disease of grapevine. The disease can be found in most grape-growing areas of the world, including the tropics. In South Africa, ... -
Epidemiology of botrytis cinerea on grape : wound infection by dry, airborne conidia
(South African Society for Enology and Viticulture, 2002)This study describes the infection of fresh wounds on berries exposed to freshly deposited airborne Botrytis cinerea conidia, and on berries carrying previously deposited conidia and germlings (latent infections). Grapes ... -
Fungicide efficacy against botrytis cinerea at different positions on grape shoots
(South African Society for Enology and Viticulture, 2003)Fungicide efficacy at different positions on grape shoots was determined on vinelets inoculated with Botrytis cinerea. To ensure proper fungicide coverage, vinelets (table grape cultivar Dauphine, wine grape cultivar Merlot ... -
Fitness on grape berries of botrytis cinerea isolates belonging to different dicarboximide sensitivity classes
(South African Society for Enology and Viticulture, 2003)Seasonal fluctuations in the frequency of dicarboximide-resistant Botrytis cinerea isolates in Western Cape vineyards suggest a reduced fitness of these isolates. In this study fitness of sensitive, ultra-low-level and ... -
Occurrence of fruit-decaying fungi on adult male Mediterranean fruit flies (ceratitis capitata) captured in orchards and adjacent vineyards
(South African Journal of Enology & Viticulture, 2004)The occurrence of adult male Ceratitis fruit flies and their potential to transmit fungi associated with pre- and postharvest decay of fruit in natura were investigated. Sensus fruit-fly traps were installed in orchards ... -
Development of a hydrolysis probe-based real-time assay for the detection of tropical strains of Fusarium oxysporum f. sp. cubense race 4
(Public Library of Science, 2017-02-08)Fusarium oxysporum f. sp. cubense (Foc) is one of the most important threats to global banana production. Strategies to control the pathogen are lacking, with plant resistance offering the only long-term solution, if sources ... -
An integrated strategy for the proactive management of grapevine trunk disease pathogen infections in grapevine nurseries
(South African Society for Enology and Viticulture, 2016)The aim of this study was to compare 11 treatment regimes (TR) in grapevine nurseries in order to eradicate trunk pathogens. Grapevine propagation material was subjected to treatments before cold storage, before and after ... -
Spray deposition and control of botrytis cinerea on grape leaves and bunches : part 1 (table grapes)
(South African Society for Enology and Viticulture, 2016)Insufficient quantity but also quality of spray deposition on susceptible grapevine tissue (i.e. target sites) and favourable conditions for pathogens could lead to control failure during high disease pressure situations. To ...
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