ePrints

Effects of nitrogen availability and spore concentration on the biocontrol activity of Ascochyta caulina in common lambsquarters (Chenopodium album)

Lookup NU author(s): Dr Reza Ghorbani, Professor Carlo Leifert

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.

Abstract

Common lambsquarters is an annual weed of many important crops. Ascochyta caulina is a plant pathogenic fungus that causes necrotic lesions on the leaves and stems of common lambsquarters. The objective of the present study was to estimate the effect of plant N supply on the biocontrol activity of A. caulina isolates against common lambsquarters. In greenhouse experiments replicated groups of common lambsquarters plants raised with different N supplies were sprayed with various isolates and concentrations of A. caulina 3 wk after planting. Height, number of leaves, total leaf area, fresh and dry weight, and tissue N concentration of common lambsquarters 4 wk after emergence increased significantly with increasing N supply. Disease development was positively related to increasing plant tissue N and also to increasing spore concentration. Fungal spore concentration also had a positive effect on the plant tissue N percentage. Ascochyta caulina isolate W90-1 caused a greater dry weight reduction in common lambsquarters than isolates I-001 and NW-6 did.

Publication metadata

Author(s): Ghorbani R, Scheepens PC, Zweerde WVD, Leifert C, McDonald AJS, Seel W

Publication type: Article

Publication status: Published

Journal: Weed Science

Year: 2002

Volume: 50

Issue: 5

Pages: 628-633

Print publication date: 01/01/2002

ISSN (print): 0043-1745

ISSN (electronic): 1550-2759

Publisher: Weed Science Society of America

URL: http://dx.doi.org/10.1614/0043-1745(2002)050[0628:EONAAS]2.0.CO;2

DOI: 10.1614/0043-1745(2002)050[0628:EONAAS]2.0.CO;2

Altmetrics

Share