Evaluation of different amounts of Glyphosate herbicide in the stages of vegetative-reproductive growth and yield of Tomato (Lycopersicum esculentum), Cucumber (Cucumis melo var. flexuosus) and Bean (Vicia faba) plants.
In this research, different amounts of glyphosate herbicide were applied at different times of plant growth. It has been used as a non-selective herbicide in agriculture in the past and present decades due to the development of resistant and resistant weeds. This scientific research was carried out in Shushtar city with the use of different amounts of glyphosate herbicide to evaluate the damage and performance of Tomato, Cucumber and Bean. Glyphosate herbicide was applied in the amounts of 1.51, 2.51, 4.56, 6.55, 8.50 grams of effective substance per hectare. Glyphosate was used in early vegetative and early reproductive stages. The results showed that there was minimal to no damage, reduction in growth and yield for the local cucumber plant of Chambar with the use of herbicides. 14 days after applying the treatment with the amount of 6.55 and 8.50 g/ha, tomato damage was observed with 28-42%. With the application of 8.50 grams per hectare, a 68% decrease in commercial yield was observed. Tomato also showed more sensitivity when exposed to this herbicide in the reproductive stage than in the vegetative stage. Beans were the most sensitive product investigated in this experiment. Damage 14 days after application of treatment after using herbicide with application rates for beans was more in the vegetative growth stage compared to reproductive stage. Also, reduction of plant height and accumulation of biomass occurred for beans. On the other hand, with the application of 8.50 grams per hectare, 13% of the relative commercial yield of beans was observed
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