Relationship of age of sunflower seedlings to infection by Plasmopara halstedii

Print
Parent Category: 1989

S. Sadaqat Mehdi and M. L. Carson

Abstract

The relationship of age of seedlings to infection by Plasmopara halstedii was studied by inoculating 3-day-old to 15-day--old sunflower seedlings. There appears to be a negative and significant correlation (r = -0.91**) between sunflower seedling age and percentage of seedling infection of downy mildew. Over 83% of the seedlings up to 8 days of age were susceptible to this pathogen. However, the l5-day-old plants showed some resistance. The percentage infection decreased with increase in age of plants.

Full Text (181 KB)

Download Joomla Free Templates for your success.
Journal of Tropical Agriculture and Food Science (JTAFS)
Publication and Knowledge Management Programme, Corporate Communication and Quality Centre,MARDI Headquarters, Serdang Persiaran MARDI-UPM, 43400 Serdang, Selangor Malaysia
Telephone: +603- 8953 7201 | Fax: +603- 8953 7232
Copyright © 2024 JTAFS. All Rights Reserved.
Joomla Business Templates by template joomla