Studies On some Legume Weeds Associated With Cereal Crops Under African Environmental Conditions

Abstract

Worldwide, wheat is the most important cereal crop, acco• unting for about one - third of the total world cereal production. Wheat is the major grain used for human consumption in the temperate region. During the last two decades there has been a very great increase in the consumption of wheat bread among the higher income groups in developing tropical countries in Africa and elsewhere; it has become almost status symbol, and its use is likely to increase. Wheat is essentially a temperate crop, but it is grown at higher altitudes in the tropics ( the approximate lapse rate is 0.7C/100m), and also extends into the tropical low lands through irrigation projects.

This study included three experiments as follows:- One experiment in the field and two experiments in pots.

1. The field experiment was conducted for studying the effect I of some herbicides on the growth of weeds associated with wheat (Triticum aestivum L.).

This experiment was perfonned in the Agricultural Experi• mental Station of the Faculty of Agriculture, Cairo Univer• sity at Giza, A.R.E, during two successive growing seasons 1991/92 and 1992/93.

Randomised complete block design with four replications was used in the two experimental seasons. Plot size was 3.0 x 3.5 m (1/400 fed.).

Data Recorded:- A. Weed characteristic :- Two weed samples from one square meter randomly taken