Hamal A, Benbella M, Rzozi S B, Bouhache M, Msatef Y
Laboratoire de Malherbologie, INRA, CRRA. Saïs et Moyen Atlas, BP. 578, Meknès, Maroc.
Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet. 2001;66(2b):761-8.
Bromus spp is causing serious problems in wheat in the Sais area. However, the damage of this weed varies from one region to another according to the agro-climatic conditions and crop systems. The characterization of the infestation level in each situation is a prerequisite to develop a control strategy adapted to each environment. This study was undertaken in order to determine the infestation level and geographical spread of the weedy brome (Bromus spp) on wheat in Sais following crop systems and pedo-climatic conditions. The results obtained during two consecutive years (1998-99 and 1999-2000) revealed that ripgut brome (Bromus rigidus Roth.) was the most dominant species in wheat fields in the surveyed regions, followed by B. rubens L., B. sterilis L., B. madritensis L. and B. mollus L. Among, 18 regions and 100 infested wheat fields, 16.67% of fields were slightly infested (Plant density of Bromus (Dbr < 90 plants/m2, 61.11% were moderately infested (90 < Dbr < 290 plants/m2) and 22.22% were highly infested (Dbr > 400 plants/m2). The maximum relative frequency was obtained with Bromus rigidus (47.15%) and the coverage was 40.43%. But, for B.rubens, B. madritensis and B. sterilis, the relative frequencies were respectively 31.42; 26 and 15% and their coverages were respectively 28.9, 20.4 and 12.5%.
雀麦属植物在塞伊斯地区给小麦造成了严重问题。然而，这种杂草的危害程度因农业气候条件和作物种植系统的不同而在不同地区有所差异。确定每种情况下的侵染水平是制定适合每种环境的防治策略的前提条件。本研究旨在根据作物种植系统和土壤气候条件，确定塞伊斯地区小麦田杂草雀麦（雀麦属植物）的侵染水平和地理分布。连续两年（1998 - 1999年和1999 - 2000年）获得的结果表明，粗硬雀麦（Bromus rigidus Roth.）是被调查地区麦田中最主要的物种，其次是鲁冰雀麦（B. rubens L.）、不育雀麦（B. sterilis L.）、马德里特雀麦（B. madritensis L.）和软雀麦（B. mollus L.）。在18个地区和100块受侵染的麦田中，16.67%的田地轻度侵染（雀麦植株密度（Dbr）< 90株/平方米），61.11%中度侵染（90 < Dbr < 290株/平方米），22.22%重度侵染（Dbr > 400株/平方米）。粗硬雀麦的相对频率最高（47.15%），覆盖度为40.43%。但是，对于鲁冰雀麦、马德里特雀麦和不育雀麦，相对频率分别为31.42%、26%和15%，它们的覆盖度分别为28.9%、20.4%和12.5%。
