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1. Padil Species Factsheet Scientific Name: Common Name Image Library Partners for New Zealand Biosecurity Image Library

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1. Padil Species Factsheet Scientific Name: Common Name Image Library Partners for New Zealand Biosecurity Image Library 1. PaDIL Species Factsheet Scientific Name: Leveillula taurica (Lév.) G. Arnaud (Ascomycota: Leotiomycetes: Erysiphales: Erysiphaceae) Common Name Leveillula taurica Live link: http://www.padil.gov.au/maf-border/Pest/Main/143035 Image Library New Zealand Biosecurity Live link: http://www.padil.gov.au/maf-border/ Partners for New Zealand Biosecurity image library Landcare Research — Manaaki Whenua http://www.landcareresearch.co.nz/ MPI (Ministry for Primary Industries) http://www.biosecurity.govt.nz/ 2. Species Information 2.1. Details Specimen Contact: Eric McKenzie - [email protected] Author: McKenzie, E. Citation: McKenzie, E. (2013) Leveillula taurica(Leveillula taurica)Updated on 4/10/2014 Available online: PaDIL - http://www.padil.gov.au Image Use: Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY- NC 4.0) 2.2. URL Live link: http://www.padil.gov.au/maf-border/Pest/Main/143035 2.3. Facets Commodity Overview: Field Crops and Pastures, Horticulture Commodity Type: Capsicum & Chilli pepper Distribution: Oceania Groups: Fungi & Mushrooms Host Family: Euphorbiaceae, Solanaceae Pest Status: 1 NZ - Non-regulated species Status: NZ - Exotic 2.4. Other Names Erysiphe taurica Lév. Oidiopsis sicula Scalia 2.5. Diagnostic Notes **Disease** Powdery mildew of peppers. White growth of mycelium and conidia form colonies on underside of leaves, distorting the leaves to some extent. Sometimes somewhat restricted by main leaf veins. Corresponding upper surface may show some discolouration. Unlike other powdery mildews, little superficial mycelium is formed and conidiophores grow out through stomata, mostly on under surface of leaves. **Morphology** _Colonies_ on both surfaces of leaves although mostly on under surface, white or becoming dull yellow in places. _Conidiophores_ unbranched, hyaline. _Conidia_ borne singly, hyaline, non-septate, of two distinct shapes; first formed conidia lanceolate, usually pointed towards the apex, 50–80 × (9–)12–16(–20) µm, length/width ratio 3.5–5.5; later-formed conidia ellipsoid to cylindric, (55–)50–75(–80) × 11–16(–20) µm. 2.6. References - Braun, U. (1987). _A Monograph of the Erysiphales (powdery mildews)_. J. Cramer, Berlin-Stuttgart, Germany, pp. 558–562. - Braun, U. & Cook, R.T.A. (2012). Taxonomic manual of the Erysiphales (powdery mildews). _CBS Biodiversity Series 11_, pp. 206–208. - Ellis, M.B. & Ellis, J.P. (1985). _Microfungi on Land Plants. An Identification Handbook_. Macmillan Publishing Company, p. 367, plate 146. - Mukerji, K.G. (1968). _Leveillula taurica. CMI Descriptions of Pathogenic Fungi and Bacteria 182_, 1–2. 3. Diagnostic Images Leveillula taurica conidia Leveillula taurica conidiophores and conidia Conidia: Glawe, D., Grove, G. & Nelson, M. Conidiophores: Glawe, D., Grove, G. & Plant Management Network Nelson, M. Plant Management Network Leveillula taurica symptoms on capsicum Leveillula taurica symptoms on capsicum leaves leaves In Life: E. McKenzie Landcare Research In Life: E. McKenzie Landcare Research Results Generated: Friday, September 24, 2021 .
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