Effects of Fusarium culmorum and water stress on durum wheat in Tunisia

被引:46
作者
Chekali, Samira [2 ]
Gargouri, Samia [3 ]
Paulitz, Timothy [1 ]
Nicol, Julie M. [4 ]
Rezgui, Mohsen [5 ]
Nasraoui, Bouzid [2 ]
机构
[1] Washington State Univ, USDA ARS, Root Dis & Biol Control Unit, Pullman, WA 99164 USA
[2] Ecole Super Agr Kef, Le Kef 7119, Tunisia
[3] Inst Natl Rech Agron Tunisie, Lab Protect Vegetaux, Agron, Tunisia
[4] CIMMYT Int, ICARDA CIMMYT Wheat Improvement Program, TR-06511 Ankara, Turkey
[5] Inst Natl Rech Agron Tunisie, Le Kef 7119, Tunisia
关键词
Fusarium culmorum; Fusarium crown and foot rot; water stress; Durum wheat; Triticum durum; CROWN ROT; WINTER-WHEAT; FOOT ROT; MANAGEMENT; INFECTION; NORTHWEST; BARLEY; ROOT;
D O I
10.1016/j.cropro.2011.01.007
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The effects of water stress on Fusarium foot and root rot in durum wheat were investigated in growth chamber, greenhouse and field tests in Tunisia. In the seedling stage, emergence of six durum wheat cultivars in the growth chamber was significantly reduced by inoculation with Fusarium culmorum and water stress (P < 0.0001), with more disease under drier conditions. Additionally, the tiller number per mature plant, the 1000 grain weight and disease severity in mature stage were reduced by inoculation in greenhouse studies. In a field test, inoculation with E culmorum significantly reduced the yield (P < 0.001), by more than 17% for Om Rabiaa and 38% for Karim, the two cultivars tested. Yield was also significantly affected by precipitation and irrigation levels. The severity of the disease, estimated by the percentage of white heads, was separately affected by the cultivar (P < 0.001) and inoculation (P = 0.0004). Percentage of white heads was 1.5 and 2 x higher in inoculated plants than non-inoculated for Om Rabiaa and Karim cultivars, respectively. Disease severity was highest in treatments with the greatest water stress. This is the first detailed study of water stress and E culmorum on durum wheat in Tunisia, and indicates that cultivar resistance and irrigation management may be important in the management of Fusarium foot rot. Published by Elsevier Ltd.
引用
收藏
页码:718 / 725
页数:8
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