Influence of Sorghum bicolor and Cynodon dactylon extracts and glyphosate herbicide on the control of Cuscuta campestris in Trifoluim alexandrinum

Two field experiments were worked out in the farm of Agricultural Research Station in Sakha district, Kafr El-Sheikh governorate, through 2022/2023 and 2023/2024 winter seasons. The aimed to study the performance of the water extracts of two weeds each alone and or mixed with glyphosate herbicide on controlling the dodder as a holoprasite weed in its host of Egyptian clover. Results indicated that the water extracts of Sorghum bicolor at 5, 10, and 15% conc. and S. bicolor at 10% and /or plus glyphosate 48% at 50 cm3/fed are promising treatments to control dodder stems infested the Egyptian clover accompanied with increasing the foliage characteristics of clover plants. While, the water extracts of Cynodon dactylon at 5, 10 and 15% conc. and / or plus glyphosate 48% at 50 cm3/fed were not satisfactory on controlling dodder stem with some increasing on the foliage characteristics of clover plants. Furthermore, glyphosate herbicides 48% at 100 and 150 cm3 /fed gave good effect of dodder stems control with little reduction of the foliage characteristics of the clover plants.This study explores the use of allelochemicals as sources for new mechanisms of herbicidal action and sustainable weed management alongside recommended herbicides.