Le Roux, P.M.2013-09-062007-01-182013-09-062000-01-0119632007-01-18Kotze, J 1963, Studies on the black spot disease of citrus caused by Guignardia Citricarpa Kiely with particular reference to its epiphytology and control at Letaba, DSc thesis, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/23891 >http://hdl.handle.net/2263/23891Thesis (DSc (Agriculture))--University of Pretoria, 1963.Please read the Summary and Conclusions(04chapter4) on pages 141-143© 2000, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.Black spot disease on citrusGuignardia citricarpa kielyUCTDThesishttp://upetd.up.ac.za/thesis/available/etd-01182007-173900/