Spatial dispersion statistics and sequential sampling plan for leaf spot disease caused by Colletotrichum lindemuthianum in French bean


Abstract views: 56

Authors

  • G.K.N. CHHETRY, R.R. MISHRA and G.D. SHARMA Department of Botany, North-Eastern Hill University, Shillong 793 014

Keywords:

Action level, economic threshold, mean crowding, leaf spot

Abstract

Iwao's patchiness regression technique was used to study the spatial distribution of Colletotrichum lindemuthianum infecting French bean leaves. The dispersion statistics indicates that the basic components of the disease lesion population aggregates and is contagiously distributed in French bean. Fungicides spray did not alter this distribution. The dispersion statistics worked out enabled to arrive at sequential sampling plan that requires a maximum of 54 leaves 'sample to assess distribution pattern. A preliminary economic threshold of one lesion per leaf was used to prepare the sampling plan.

Issue

Vol. 46 No. 1 (1993): Indian Phytopathology

Section

Research Articles

License

For Authors

As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.

For Readers

While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.

All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.

How to Cite

and G.D. SHARMA, G. C. R. M. (2002). Spatial dispersion statistics and sequential sampling plan for leaf spot disease caused by Colletotrichum lindemuthianum in French bean. Indian Phytopathology, 46(1), 64-68. https://epubs.icar.org.in/index.php/IPPJ/article/view/21406