Al-Zyoud, F.; D. Hassawi and I. Ghabeish

2015

Oxalic acid as an alienate factor for wheat and barley resistance to cereal leafminer Syringopais temperatella (Lederer, 1855) (Lepidoptera: Scythrididae).

SHILAP Revista De Lepidopterologia 43: 113-123.

The cereal leafminer, Syringopais temperatella Led. (Lep., Scythrididae) is a major pest of wheat and barley leading to a sharp decline in their production. Identification of plant cultivars with resistance to S. temperatella as a part of integrated pest management is effective, economic, durable and environmentally safe. In this work, percentage of infestation, oxalic acid and moisture content of the leaves were determined to understand the precise correlation for the resistance to S. temperatella using thirty four wheat and barley accessions during the 2011/12 and 2012/13 cropping seasons. The results indicated that wheat and barley accessions' effects were statistically significant for infestation percentages and leaf's oxalic acid level. The accessions revealed significant inverse correlation of oxalic acid content with infestation percentage in wheat (r = -0.445, P = 0.026, y = -0.10×34.20), and barley (r = -0.263, P = 0.494, y = -0.07×33.77). There was positive correlation between leaf moisture content and infestation percentage in wheat (r = 0.190, P = 0.362, y = 0.09×16.58), and barley (r = 0.733, P = 0.016, y = 0.40×03.53). In conclusion, oxalic acid exuding from leaf has been shown to contribute to the pest resistance. The accessions, Acsad 1273 and 1614 may be used as resistant donors in the genetically crossing program to evolve leafminer tolerant accessions of barley and wheat, respectively