Effect of Fungicide Seed Dress on the Introduced Microbial Population and Plant Health in Cotton (Gossypium hirsutum L.)
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초록
Experiments were carried out to study the effect of fungicide seed dress on Fusarium wilt, introduced microflora and associate plant and soil characteristics in the cotton cultivar LRA 5166. Commercially available Carbendazim, which is a systemic broad spectrum fungicide, used against Fusarium wilt was used as the seed dress. Trichoderma spp. And arbuscular mycorrhizal fungal (AMF) species were used as introduced biocontrol agents. Disease severity was assessed by manual evaluation. Plant responses were measured in terms of tissue Nitrogen, Phosphorus, Potassium, tissue dry weights and biochemical studies. Soil quality was assessed by measuring available Nitrogen, Phosphorus, Potassium and organic carbon content in the soil. Plants inoculated with AMF and Trichoderma with fungicide application reduced the disease severity and reduced the damage of soil quality due to the application of fungicide. Soil microbial activity was reinstated by the application of AMF and biocontrol agents along with the fungicides. Inoculation of cotton plants with a combination of AMF and Trichoderma along with fungicide application was found to improve soil quality, rather than the application of fungicide alone. The experiment shows that the detrimental effects of the fungicides can be nullified by the application of selective microflora into the soil.
Abstract
Experiments were carried out to study the effect of fungicide seed dress on Fusarium wilt, introduced microflora and associate plant and soil characteristics in the cotton cultivar LRA 5166. Commercially available Carbendazim, which is a systemic broad spectrum fungicide, used against Fusarium wilt was used as the seed dress. Trichoderma spp. And arbuscular mycorrhizal fungal (AMF) species were used as introduced biocontrol agents. Disease severity was assessed by manual evaluation. Plant responses were measured in terms of tissue Nitrogen, Phosphorus, Potassium, tissue dry weights and biochemical studies. Soil quality was assessed by measuring available Nitrogen, Phosphorus, Potassium and organic carbon content in the soil. Plants inoculated with AMF and Trichoderma with fungicide application reduced the disease severity and reduced the damage of soil quality due to the application of fungicide. Soil microbial activity was reinstated by the application of AMF and biocontrol agents along with the fungicides. Inoculation of cotton plants with a combination of AMF and Trichoderma along with fungicide application was found to improve soil quality, rather than the application of fungicide alone. The experiment shows that the detrimental effects of the fungicides can be nullified by the application of selective microflora into the soil.
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