Grapevine leaf application of steinernema yirgalemense to control planococcus ficus in semi-field conditions

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dc.contributor.authorPlatt, T.en_ZA
dc.contributor.authorStokwe, N. F.en_ZA
dc.contributor.authorMalan, A. P.en_ZA
dc.date.accessioned2021-03-19T12:18:06Z
dc.date.available2021-03-19T12:18:06Z
dc.date.issued2019
dc.descriptionCITATION: Platt, T., Stokwe, N. F. & Malan, A. P. Grapevine leaf application of steinernema yirgalemense to control planococcus ficus in semi-field conditions. South African Journal of Enology and Viticulture, 40(1):1-9, doi:10.21548/40-1-3141.
dc.descriptionThe original publication is available at http://www.journals.ac.za/index.php/sajev
dc.description.abstractThe vine mealybug, Planococcus ficus Signoret (Hemiptera: Pseudococcidae), is a key insect pest of South African grapevine. The ability of mealybugs to avoid or resist the action of chemical pesticides has led to the investigation of alternative control methods, such as the application of entomopathogenic nematodes (EPNs). However, EPN application faces challenges, due to the maladaptation of EPN species to aboveground conditions. In this study, the ability of adjuvants to improve the control of P. ficus in grapevine using an indigenous nematode species, Steinernema yirgalemense, was investigated. A trial was performed to assess EPN survival on grapevine foliage, when applied in the morning (high humidity / low temperature) compared with in the afternoon (high temperature / low humidity). In a semi-field trial, the combination ofadjuvants Zeba® and Nu-Film-P® resulted in 66% control of P. ficus after 48 h, compared to the use of Zeba® alone (43%), and EPNs alone (28%). Additionally, lower concentrations of EPNs showed predictably lower mortality rates of P. ficus. Significantly, higher EPN survival was recorded at each time interval in the morning, compared with the corresponding interval in the afternoon. This study demonstrates the ability of S. yirgalemense, when applied with adjuvants and at an appropriate time of day, to control P. ficus on grapevine, under semi-field conditions.en_ZA
dc.description.urihttps://www.journals.ac.za/index.php/sajev/article/view/3141
dc.description.versionPublisher's version
dc.format.extent9 pages
dc.identifier.citationPlatt, T., Stokwe, N. F. & Malan, A. P. Grapevine leaf application of steinernema yirgalemense to control planococcus ficus in semi-field conditions. South African Journal of Enology and Viticulture, 40(1):1-9, doi:10.21548/40-1-3141
dc.identifier.issn2224-7904 (online)
dc.identifier.issn0253-939X (print)
dc.identifier.otherdoi:10.21548/40-1-3141
dc.identifier.urihttp://hdl.handle.net/10019.1/109689
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Enology and Viticulture
dc.rights.holderSouth African Society for Enology and Viticulture
dc.subjectGrapevinesen_ZA
dc.subjectPlanococcus ficusen_ZA
dc.subjectMealybugs -- Biological control -- South Africaen_ZA
dc.subjectGrapes -- Diseases and pestsen_ZA
dc.subjectSteinernema yirgalemenseen_ZA
dc.subjectGrapes -- Effect of climatic changes onen_ZA
dc.subjectGrapevine leafroll virusen_ZA
dc.titleGrapevine leaf application of steinernema yirgalemense to control planococcus ficus in semi-field conditionsen_ZA
dc.typeArticleen_ZA
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