International audienceAn experiment was carried out under greenhouse conditions in order to evaluate the effects of soil applications of bentazone, isoproturon, fluchloralin and 2,4-D on plant vitality, chlorophyll content, N and protein content, nodulation and seed production in chickpea, inoculated with Mesorhizobium ciceri. Applying ten times the recommended rates of all herbicides adversely affected the plant vigor, total chlorophyll content and nitrogen (N) content in shoot and seed production. Fluchloralin and 2,4-D gave the highest adverse effects on seed production in chickpea while protein content in seeds increased significantly following herbicide applications but decreased with an increase in application rates. The ten times the recommended rates of bentazone and 2,4-D completely decreased nodulation. Nodule occupancy determined by immunoblot assay ranged between 72 and 89 percent, while each rate of the four herbicides except the normal dose of bentazone showed an adverse effect on rhizobial populations within single nodules of the chickpea plant

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The effects of carbendazim, captan, thiram, and mancozeb, on plant vitality, chlorophyll content, N uptake, protein content, nodulation, and seed yield in chickpea (Cicer arietinun) were assessed in a controlled environment. Seeds treated with fungicides at 1 and 1.5 g.a.i. kg seed had no significant adverse effect on plant vigor, seed yield, and N and protein contents. In contrast, fungicides applied at 2 g.a.i./kg of captan, thiram and mancozeb, significantly reduced the measured parameters. In general, the toxicity of fungicides in terms of seed yield increased in the following order: Control=carbendazim > thiram > captan > mancozeb. Total chlorophyll content in foliage declined consistently with fungicides dose rates and application days. Seeds treated with lower rates of fungicides significantly increased nodulation (nodule number per plant and its dry mass) and were compatible with chickpea inoculum used in this study. Although carbendazim at 2 g.a.i. kg seed had no phytotoxic effect assessed under greenhouse conditions, it significantly reduced the chlorophyll content, nodulation (60d) and N content in shoots.

The effects of carbendazim, captan, thiram, and mancozeb, on plant vitality, chlorophyll content, N uptake, protein content, nodulation, and seed yield in chickpea (Cicer arietinun) were assessed in a controlled environment. Seeds treated with fungicides at 1 and 1.5 g.a.i. kg seed had no significant adverse effect on plant vigor, seed yield, and N and protein contents. In contrast, fungicides applied at 2 g.a.i./kg of captan, thiram and mancozeb, significantly reduced the measured parameters. In general, the toxicity of fungicides in terms of seed yield increased in the following order: Control=carbendazim > thiram > captan > mancozeb. Total chlorophyll content in foliage declined consistently with fungicides dose rates and application days. Seeds treated with lower rates of fungicides significantly increased nodulation (nodule number per plant and its dry mass) and were compatible with chickpea inoculum used in this study. Although carbendazim at 2 g.a.i. kg seed had no phytotoxic effect assessed under greenhouse conditions, it significantly reduced the chlorophyll content, nodulation (60d) and N content in shoots.